Abstract: The present invention provides a composite oxide that can achieve a high low-temperature output characteristic, a method for manufacturing the same, and a positive electrode active material in which the generation of soluble lithium is suppressed and a problem of gelation is not caused during the paste preparation. A positive electrode active material for non-aqueous electrolyte secondary batteries, including a lithium-metal composite oxide powder including a secondary particle configured by aggregating primary particles containing lithium, nickel, manganese, and cobalt, or a lithium-metal composite oxide powder including both the primary particles and the secondary particle, wherein the secondary particle has a hollow structure inside as a main inside structure, the slurry pH is 11.5 or less, the soluble lithium content rate is 0.5 [% by mass] or less, the specific surface area is 2.0 to 3.0 [m2/g], and the porosity is 20 to 50 [%].

Abstract: Embodiments described in this application relate generally to a system, an apparatus and/or methods for manufacturing electrodes by infusion electrolyte into compacted electrode materials. In some embodiments, a working electrode materials can be produced using an infusion mixing and manufacturing process. In some embodiments, a single-sided finished electrode can be produced directly from a dry powder mixture using an infusion mixing and manufacturing process. In some embodiments, a double-sided finished electrode can be produced directly from a dry powder mixture using an infusion mixing and manufacturing process. The electrodes produced by an infusion mixing and manufacturing process generally perform better than those produced by non-infusion processes.

Abstract: Disclosed herein are electrolytes and electrochemical devices. The electrochemical devices comprise cathodes that include nickel-rich layered lithium transition metal oxides, lithium-rich layered transition-metal oxides, lithium manganese-based spinel oxides, lithium polyanion-based compounds, and combinations thereof. The electrolytes include a lithium imide salt, an aprotic acyclic carbonate solvent, and an additive, wherein the additive comprises a metal salt, an aprotic solvent, or a combination thereof. The electrolyte can be stable at a voltage of 4.3 V or above vs. Li/Li+.

Abstract: A nonaqueous electrolyte for a lithium ion battery includes a lithium salt, a first nonaqueous solvent, and an additive mixture comprising a first operative additive of lithium difluorophosphate and a second operative additive of either fluoro ethylene carbonate or vinylene carbonate. A lithium-ion battery includes a negative electrode, a positive electrode comprising NMC with micrometer-scale grains, a nonaqueous electrolyte having lithium ions dissolved in a first nonaqueous solvent, and an additive mixture having a first operative additive of either fluoro ethylene carbonate or vinylene carbonate and a second operative additive of either 1,3,2-dioxathiolane-2,2-dioxide, another sulfur-containing additive, or lithium difluorophosphate.

Abstract: The application relates to a positive active material precursor including a transition metal composite oxide precursor. The transition metal composite oxide precursor exhibits a peak full width at half maximum of a (200) plane (2?=about 42° to about 44°) in X-ray diffraction analysis in a range of about 0.3° to about 0.5°. The application also relates to a positive active material using the precursor, a method of preparing the same, and a positive electrode and a rechargeable lithium battery including the same.

Abstract: A charging method of a non-aqueous electrolyte secondary battery involves a first charging step in which, defining x as the ratio of the capacity of a silicon compound to the rated capacity Q (0.1?x?0.5), charging is performed at a first fixed current value I1st that satisfies the expression below; and a high current charging step in which after completion of the first charging step, charging is performed at a fixed current value Imax higher than the first fixed current value I1st.

Abstract: A positive electrode active material in which a capacity decrease caused by charge and discharge cycles is suppressed is provided. Alternatively, a positive electrode active material having a crystal structure that is unlikely to be broken by repeated charging and discharging is provided. The positive electrode active material contains titanium, nickel, aluminum, magnesium, and fluorine, and includes a region where titanium is unevenly distributed, a region where nickel is unevenly distributed, and a region where magnesium is unevenly distributed in a projection on its surface. Aluminum is preferably unevenly distributed in a surface portion, not in the projection, of the positive electrode active material.

Abstract: A more efficient and lower cost method for producing electrochemically stable, and thus safe from thermal runaway, high electrochemical capacity coated lithium nickelate is disclosed. The coated nickelate hydroxide particles are formed from a mixed metal sulfate solution (MMS) serving as the starting material that is obtained from recycled lithium ion and/or nickel metal hydride batteries. The coating of the particles includes a relatively small amount of cobalt/manganese oxide forming the surface of the nickelate particles, while the core of the particles includes a relatively large amount of nickel in relation to the weight of the coating. Battery cathode electrodes may be manufactured by using the obtained coated lithium nickelate particles as the cathode active material (CAM) in forming the battery cathodes.

Abstract: The present disclosure relates to an anode for a lithium secondary battery, wherein an anode material layer is formed on at least one surface of an anode current collector, and the anode material layer includes large-particle graphite, a small-particle silicon-based material, and fine-particle graphite, and satisfies the following conditions 1 to 3: [Condition 1] Average diameter D50 of the large-particle graphite (D1): 1 to 50 ?m [Condition 2] Average diameter D50 of the small-particle silicon-based material (D2): 0.155D1 to 0.414D1 [Condition 3] Average diameter D50 of the fine-particle graphite (D3): 0.155D1 to 0.414D1, or 0.155D2 to 0.414D2.

Abstract: A lithium manganate positive electrode active material, comprising a lithium manganate matrix and a cladding layer as a “barrier layer” and a “functional layer” are described. The cladding layer can not only “prevent” the transition metal ions which have been produced by the lithium manganate matrix from directly “running” into the electrolyte solution, but also “prevent” the hydrofluoric acid in the electrolyte solution from directly contacting with the lithium manganate substrate, and then prevent the lithium manganate matrix from dissolving out more transition metal manganese ions; as a “functional layer”, the cladding layer contains various effective ingredients inside, which can reduce the transition metal manganese ions already present inside the battery through chemical reactions or adsorption effects, thus slowing down the generation of transition metal manganese and the decomposition of the SEI film (solid electrolyte interphase film) catalyzed by the transition metal manganese.

Abstract: An electrode catalyst for an Oxygen Reduction Reaction (ORR) is provided that includes a transition metal nitride layer on a substrate, an ORR surface oxide layer deposited on the transition metal nitride layer, where the ORR surface oxide layer includes from sub-monolayer to 20 surface oxide monolayers.

Abstract: A positive electrode active material according to the present disclosure includes a lithium composite oxide that contains first particles having a crystal structure belonging to space group R-3m and second particles having a crystal structure belonging to space group C2/m. The crystal structure of the second particles has a larger amount of cation mixing than the crystal structure of the first particles. The second particles have a smaller particle size than the first particles. Mathematical Formula 0.05?integrated intensity ratio I(18°-20°)/I(43°-46°)?0.99 is satisfied. The integrated intensity ratio I(18°-20°)/I(43°-46°) is a ratio of the integrated intensity I(18°-20°) to the integrated intensity I(43°-46°). The integrated intensity I(A°-B°) is the integrated intensity of a maximum peak present in the range of angle of diffraction 2? greater than or equal to A° and less than or equal to B° in the X-ray diffraction pattern of the lithium composite oxide.

Abstract: A positive electrode active material for a secondary battery which includes a nickel-based lithium composite transition metal oxide including nickel (Ni), wherein the lithium composite transition metal oxide satisfies Equation 1 and Equation 2 below 80 nm?crystallite sizeFWHM?150 nm??[Equation 1] ?size(|crystallite sizeIB?crystallite sizeFWHM|)?20??[Equation 2] wherein, in Equation 1 and Equation 2, crystallite sizeFWHM is a crystallite size obtained by calculating from X-ray diffraction (XRD) data using a full width at half maximum (FWHM) method, and crystallite sizeIB is a crystallite size obtained by calculating from XRD data using an integral breadth (IB) method.

Abstract: A charging method of a non-aqueous electrolyte secondary battery involves a first charging step in which, defining x as the ratio of the capacity of a silicon compound to the rated capacity Q (0.1?x?0.5), charging is performed at a first fixed current value I1st that satisfies the expression below; and a high current charging step in which after completion of the first charging step, charging is performed at a fixed current value Imax higher than the first fixed current value I1st.

Abstract: In some embodiments, an electrode can include a current collector, a composite material in electrical communication with the current collector, and at least one phase configured to adhere the composite material to the current collector. The current collector can include one or more layers of metal, and the composite material can include electrochemically active material. The at least one phase can include a compound of the metal and the electrochemically active material. In some embodiments, a composite material can include electrochemically active material. The composite material can also include at least one phase configured to bind electrochemically active particles of the electrochemically active material together. The at least one phase can include a compound of metal and the electrochemically active material.

Abstract: A lithium-ion secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The electrolytic solution includes a solvent, an electrolyte salt, and an aminoanthraquinone polymer compound. The aminoanthraquinone polymer compound includes a divalent maleic anhydride part and a divalent aminoanthraquinone derivative part.

Abstract: A battery module, a battery pack, and an electric apparatus are provided. In some embodiments, the battery module includes a first type of cell and a second type of cell that are cells of different chemical systems, where the first type of cell includes n first cells, the second type of cell includes m second cells, n and m each are selected from an integer greater than 1, at least one of the first cells and at least one of the second cells are electrically connected in series, and the first cell and the second cell satisfy at least the following relationships: 0.08??RB/?RA?3.50, and 0.10 m?/100 cycles??RA?0.40 m?/100 cycles, where ?RA is a discharge resistance growth rate of the first cell, and ?RB is a discharge resistance growth rate of the second cell; and IMPB<IMPA, where IMPA is an alternating current impedance of the first cell, and IMPB is an alternating current impedance of the second cell.

Abstract: The invention is directed towards a battery. The battery includes a cathode, an anode, a separator between the cathode and the anode, and an electrolyte. The cathode includes a conductive additive and an electrochemically active cathode material. The electrochemically active cathode material includes a beta-delithiated layered nickel oxide. The beta-delithiated layered nickel oxide has a chemical formula. The chemical formula is LixAyNi1+a?zMzO2·nH2O where x is from about 0.02 to about 0.20; y is from about 0.03 to about 0.20; a is from about 0 to about 0.2; z is from about 0 to about 0.2; and n is from about 0 to about 1. Within the chemical formula, A is an alkali metal. The alkali metal includes potassium, rubidium, cesium, and any combination thereof. Within the chemical formula, M comprises an alkaline earth metal, a transition metal, a non-transition metal, and any combination thereof. The anode includes an electrochemically active anode material.

Abstract: In some embodiments, an electrode can include a first and second conductive layer. At least one of the first and second conductive layers can include porosity configured to allow electrolyte to flow therethrough. The electrode can also include an electrochemically active layer having electrochemically active material sandwiched between the first and second conductive layers. The electrochemically active layer can be in electrical communication with the first and second conductive layers.

Abstract: Provided are a cathode active material for a lithium secondary battery, a method for preparing the same, and a lithium secondary battery comprising the same. The cathode active material for a lithium secondary battery comprises: a lithium metal compound; and a lithium compound disposed on the surface of the lithium metal compound, wherein the content of lithium contained in the lithium compound is 0.25 parts by weight or less with respect to 100 parts by weight of the lithium metal compound, wherein the specific surface area of the lithium compound is between 0.5 m2/g and 2.0 m2/g, and the pH of the lithium compound is between 11.5 and 12.3.

Abstract: A method of producing a rechargeable lithium battery cell, the method comprising (a) preparing a liquid electrolyte solution comprising an ion-conducting polymer dispersed in a first liquid solvent and an optional lithium salt dissolved in the first liquid solvent; (b) impregnating the electrolyte solution into the cathode, the anode, a porous structure of the separator, or the battery cell; (c) removing the first liquid solvent; and (d) impregnating a second liquid solvent, comprising an optional lithium salt dissolved therein, into the cathode, the anode, the separator porous structure, or the battery cell; wherein the ion-conducting polymer comprises a polymer having an ion conductivity from 10?8 S/cm to 10?2 S/cm when measured at room temperature without the presence of a liquid solvent and the polymer does not occupy more than 25% by weight of the cathode, not counting a current collector weight.

Abstract: Disclosed are a secondary battery, an active material, a method for preparing the same, and a lithium secondary battery including the same. In an embodiment, provided is a secondary battery including a positive electrode, a negative electrode and an electrolyte, wherein the secondary battery further includes a reaction-inducing substance located in any one of the positive electrode, the negative electrode and the electrolyte, wherein the reaction-inducing substance forms a reaction product by consuming thermal energy when exposed to a predetermined temperature or higher in a use environment of the secondary battery, thereby improving thermal safety of the secondary battery.

Abstract: Provided are electrochemical cells, comprising water-retaining components, and methods of fabricating such electrochemical cells. A water-retaining component is configured to deliver water to the positive active material during the operation of the electrochemical cell. The water-retaining component may be a part of the positive active material layer, a part of the electrolyte layer, and/or a standalone component. In some examples, the water-retaining component comprises one or more crystal hydrates (e.g., MgSO4, MgCl2, Na2SO4, Na2HPO4, CuSO4, CaCl2, KAl(SO4)2, and Mg(NO3)2), one or more water-retaining polymers (e.g., sodium polyacrylate, potassium polyacrylate, ammonium polyacrylate, and a cellulose derivative), one or more inorganic compounds (e.g., fumed silica, precipitated silica). In some examples, a method of forming an electrochemical cell comprises printing a positive active material layer, a negative active material layer, and an electrolyte layer, e.g.

Abstract: A method for preparing a positive electrode active material for a secondary battery is provided. The method includes preparing a lithium composite transition metal oxide including nickel, cobalt, and manganese (Mn), wherein the content of the nickel in the total content of the transition metal is 60 mol % or greater. The lithium composite transition metal oxide, MgF2 as a fluorine (F) coating source, and a boron (B) coating source undergoes dry mixing and heat treatment to form a coating portion on the particle surface of the lithium composite transition metal oxide. In addition, a positive electrode active material prepared as described above, is also provided.

Abstract: Provided is an organic sulfur material comprising a sulfur-modified acrylic resin, wherein an acrylic resin is at least one polymer selected from the group consisting of (a) a polymer of at least one selected from the group consisting of acrylate compounds represented by CH2?C(R11)COOR12, wherein R11 is a hydrogen atom or a methyl group and R12 is an alkyl group, and (b) a polymer of at least one selected from the group consisting of acrylate compounds above and at least one selected from the group consisting of diacrylate compounds represented by CH2?C(R21)COO—Y—OCO(R22)C?CH2, wherein each of R21 and R22 is the same or different and is a methyl group, etc., Y is a hydrocarbylene group, etc., wherein the hydrocarbylene group may have a substituent selected from a hydroxyl group and an alkyl group.

Abstract: Process for modifying an electrode active material according to general formula Li1+xTM1?xO2, wherein TM contains a combination of Ni and at least one transition metal selected from Co and Mn, and, optionally, at least one metal selected from Al, Ba, and Mg and, optionally, one or more transition metals other than Ni, Co, and Mn, wherein at least 75 mole-% of TM is Ni, and x is in the range of from ?0.05 to 0.2, said process comprising the steps of (a) treating said Li1+xTM1?xO2 with an aqueous medium with a pH value of at least 5 and up to 14, (b) removing said aqueous medium from treated Li1+xTM1?xO2 by way of a solid-liquid separation, wherein steps (a) and (b) are commenced with a maximum time difference of 3 minutes. In addition, the present invention is directed towards Ni-rich electrode active materials.

Abstract: A process for making a cathode active material for a lithium ion battery is described. The process includes (a) a step of synthesizing a mixed oxide of formula Li1+xTM1?xO2 at a temperature ranging from 750 to 1000° C. in an oxidizing atmosphere, where TM is a combination of two or more transition metals of Mn, Co and Ni and, optionally, at least one more metal of Ba, Al, Ti, Zr, W, Fe, Cr, K, Mo, Nb, Mg, Na and V, and x is a number ranging from zero to 0.2, (b) a step of cooling down the material obtained from step (a) to a temperature ranging from 100 to 400° C., (c) a step of adding at least one reactant of BF3, SO2 and SO3 at the temperature of 100 to 400° C., and (d) a step of cooling down to a temperature of 50° C. or below.

Abstract: Methods for synthesizing single crystalline Ni-rich cathode materials are disclosed. The Ni-rich cathode material may have a formula LiNiXMnyMzCo1-x-y-zO2, where M represents one or more dopant metals, x?0.6, 0.01?y<0.2, 0?z?0.05, and x+y+z?1.0. The methods are cost-effective, and include methods for solid-state, molten-salt, and flash-sintering syntheses.

Abstract: Set forth herein are compositions comprising A·(LiBH4)·B·(LiX)·C·(LiNH2), wherein X is fluorine, bromine, chloride, iodine, or a combination thereof, and wherein 0.1?A?3, 0.1?13?4, and 0?C?9 that are suitable for use as solid electrolyte separators in lithium electrochemical devices. Also set forth herein are methods of making A·(LiBH4)·B·(LiX)·C·(LiNH2) compositions. Also disclosed herein are electrochemical devices which incorporate A·(LiBH4)·B·(LiX)·C·(LiNH2) compositions and other materials.

Abstract: Disclosed are a separator for secondary batteries with enhanced stability and a method of manufacturing the separator. The separator can prevent self-discharge which may occur when a porous non-woven fabric material is used for a separator; can perform a shutdown function at a high temperature of 200° C. or less; and can avoid even under harsh conditions of high temperatures, deterioration in stability caused by internal short-circuit of positive and negative electrodes. In particular, the separator for secondary batteries of the present invention includes a porous non-woven fabric material impregnated with a baroplastic polymer powder and pores of the porous non-woven fabric material are filled with the baroplastic polymer powder by pressing an assembly of the secondary battery.

Abstract: Provided is a nickel powder in which growth of the nickel hydroxide component into a plate-shaped crystal is suppressed in the oxide film, and the content of coarse particles containing plate-shaped nickel hydroxide is small, and provided is a method for manufacturing the nickel powder by a wet process in which the nickel powder can be produced further simply and easily. A nickel powder including: particles having a substantially spherical shape and a number average size of 0.03 ?m to 0.4 ?m; and an oxide film, on the particle surface, containing a basic salt of nickel hydroxide, wherein the content of coarse particles having a particle size of more than 0.8 ?m is 200 mass ppm or less, and the content of coarse particles having a particle size of more than 1.2 ?m is 100 mass ppm or less.

Abstract: A positive electrode active material precursor for a non-aqueous electrolyte secondary battery, including-nickel composite hydroxide particles, is provided, wherein a cross section of each nickel composite hydroxide particle includes voids, and an average value of a ratio of an area of the voids in an area of each of the plurality of regions partitioned by predetermined boundary lines, is greater than or equal to 0.5% and less than or equal to 5.0%, and a standard deviation of the ratio of the area of the voids in the area of each of the plurality of regions partitioned by the predetermined boundary lines, is less than or equal to 1.0.

Abstract: The present invention relates to a positive electrode active material having improved electrical characteristics by adjusting an aspect ratio gradient of primary particles included in a secondary particle, a positive electrode including the positive electrode active material, and a lithium secondary battery using the positive electrode.

Abstract: Stabilized layered lithium metal oxide cathode materials are described which include excess lithium, Ni, Mn, and at least one other metal ion. The materials comprise a layered LiMO2-type material in which M comprises a combination of Ni, Mn, and at least one other metal ion that includes less than about 6 mol % Co; and which has about 1 to 6 percent excess lithium. In one embodiment, the stabilized lithium metal oxide cathode material comprises a composition having the empirical formula xLi2MnO3·(1?x)LiNi0.5+?/2Mn0.5??Co?/2O2, wherein 0<x?0.1; and 0???0.2. In another embodiment, the stabilized lithium metal oxide cathode material comprises a composition having the empirical formula Li1+3y[NiaMnbM?c]1?yO2, wherein M? is one of more metal selected from the group consisting of Co, Al, Fe, Mg, and Ti; 0<y?0.02; 0.85?a?0.96; 0.03?b?0.1; and 0.01?c?0.1.

Abstract: A cathode configured for use within a fuel cell system is provided. The cathode includes a cathode substrate. The cathode further includes a coating disposed upon the cathode substrate and including a fluorocarbon polymer additive configured for sintering at a temperature of less than 200° C. The fluorocarbon polymer additive may be mixed with a catalyst ink coating or may be applied separately as a topcoat layer.

Abstract: Provided is a 5 V class spinel type lithium nickel manganese-containing composite oxide having an operating potential of 4.5 V or more with respect to a metal Li reference potential, wherein the composite oxide is able to improve cycle characteristics while suppressing the amount of gas generated under high temperature environments and, moreover, to improve output characteristics while suppressing a shoulder on discharge at around 4.1 V in a charge and discharge curve. The spinel type lithium nickel manganese-containing composite oxide is represented by a general formula [Li(LiaNiyMnxTibMgzM?)O4-?] (where 0<a, 0<b, 0.30?y<0.60, 0<z, 0??, x=2?a?b?y?z??<1.7, 3?b/a?8, 0.11<b+z+?, 0<z/b<1, 0???0.2, and M represents one or two or more elements selected from the group consisting of Fe, Co, Ba, Cr, W, Mo, Y, Zr, Nb, P, and Ce).

Abstract: According to an embodiment, a secondary battery system includes a secondary battery, a calculator, and a controller. The secondary battery includes a first electrode including a first and second active materials, and a second electrode including a third active material. The calculator calculates a current ratio of currents passing through the first and second active materials for each of different values of a charge amount of the first electrode, based on capacities and capacity-versus-potential properties of the first and second active materials. The controller, based on the capacities of the first and second active materials and the current ratio when the charge amount of the first electrode takes a first value, controls the current passing through the secondary battery when the charge amount indicates the first value.

Abstract: The present invention provides a lithium-nickel-manganese-cobalt composite oxide in which the reactivity between a lithium raw material and a metal composite hydroxide is improved so that a high low-temperature output characteristic can be achieved, a method for manufacturing the composite oxide, and a positive electrode active material and the like without causing a problem of gelation during the paste preparation. A positive electrode active material for non-aqueous electrolyte secondary batteries, including a lithium-metal composite oxide powder including a secondary particle configured by aggregating primary particles containing lithium, nickel, manganese, and cobalt, or a lithium-metal composite oxide powder including both the primary particles and the secondary particle. The secondary particle has a solid structure inside as a main inside structure, the slurry pH is 11.5 or less, the soluble lithium content rate is 0.5 [% by mass] or less, and the specific surface area is 1.0 to 2.0 [m2/g].

Abstract: A solid electrolyte of the present disclosure includes: a porous dielectric having a plurality of pores interconnected mutually; and an electrolyte including a metal salt and at least one selected from the group consisting of an ionic compound and a bipolar compound and at least partially filling an interior of the plurality of pores. Inner surfaces of the plurality of pores of the porous dielectric are at least partially modified by a functional group containing a halogen atom.

Abstract: Silicon particles for use in an electrode in an electrochemical cell are provided. The silicon particles may have outer regions extending about 20 nm deep from the surfaces, the outer regions comprising an amount of aluminum such that a bulk measurement of the aluminum comprises at least about 0.01% by weight of the silicon particles. The bulk measurement of the aluminum may provide the amount of aluminum present at least in the outer regions.

Abstract: Disclosed is a method of preparing a cathode active material useful in a sodium ion secondary battery having high reversible capacity and excellent cycle characteristics. The method for preparing a cathode active material composed of Zrw-doped NaxLiyMzOa includes the steps of (A) doping LiyMzOa with Zrw to provide Zrw-doped LiyMzOa; and (B) dissociating Li ion from the Zrw-doped LiyMzOa and inserting Na ion thereto to provide the Zrw-doped NaxLiyMzOa, wherein M is selected from Ti, V, Cr, Mn, Fe, Co, Ni, Mo, Ru, and combinations thereof, and wherein 0.005<w<0.05, 0.8?x?0.85, 0.09?y?0.11, 7?x/y?10, 0.7?z?0.95, and 1.95?a?2.05. When the cathode active material is used for manufacturing a cathode for a sodium ion secondary battery, the battery can substitute for a conventional, expensive lithium ion secondary battery.

Abstract: Discussed are a metal plate for resistance welding and a resistance welding method using the same, wherein the metal plate is for being resistance-welded to an electrode terminal of a cylindrical battery, and the metal plate includes a body; and a pair of protrusion units located spaced apart from each other by a predetermined distance, the pair of protrusion unit being provided at one side surface of the body, and a slit is formed between the pair of protrusion units.

Abstract: The present invention provides a positive electrode for a lithium secondary battery, including a first positive electrode active material including a lithium cobalt-based oxide, and a second positive electrode active material including a lithium composite transition metal oxide containing at least two selected from the group consisting of nickel (Ni), cobalt (Co), and manganese (Mn), wherein, when the state of charge (SOC) of the first positive electrode active material in which the voltage of the lithium secondary battery reaches a constant voltage (CV) at 1 C-rate is referred to as SOC1, and the state of charge (SOC) of the second positive electrode active material in which the voltage of the battery reaches a constant voltage (CV) at 1 C-rate is referred to as SOC2, the SOC1 and the SOC2 satisfy the relationship represented by Equation 1 below. SOC1<SOC2<1.

Abstract: A positive electrode active material precursor is provided, which includes a transition metal hydroxide particle represented by Formula 1 and a cobalt oxide particle and a manganese oxide particle attached to the surface of the transition metal hydroxide particle. A preparation method thereof, a positive electrode active material prepared using the same, a positive electrode including the positive electrode active material, and a secondary battery including the positive electrode are also provided.

Abstract: A cathode active material of formula LiNixMnyAlzM?O2-?B? or NaNix?Mny?Alz?M???O2-??B??, wherein M is a combination of Ti, and Mg; M? is Ti, Mg, or a combination of thereof; B is selected from the group of F, S, Se, or Cl; 0.8<x<1, 0<y<0.2, 0<z?0.2, 0???0.2, 0???0.1, 0.5<x?<1, 0<y?<0.5, 0<z??0.2, 0????0.2, and 0????0.1. The particle is a single crystal, a single particle, or a secondary particle comprising a plurality of primary particles; and the particle is a uniform composition or a concentration gradient composition.

Abstract: The present application discloses a positive electrode active material including a lithium nickel cobalt manganese oxide, the molar content of nickel in the lithium nickel cobalt manganese oxide accounts for 60%-90% of the total molar content of nickel, cobalt and manganese, and the lithium nickel cobalt manganese oxide has a layered crystal structure of a space group R 3m; a transition metal layer of the lithium nickel cobalt manganese oxide includes a doping element, and the local mass concentration of the doping element in particles of the positive electrode active material has a relative deviation of 20% or less; and in a differential scanning calorimetry spectrum of the positive electrode active material in a 78% delithiation state, an initial exothermic temperature of a main exothermic peak is 200° C. or more, and an integral area of the main exothermic peak is 100 J/g or less.

Abstract: A positive active material for a rechargeable lithium battery includes a lithium nickel-based composite oxide including a secondary particle in which a plurality of plate-shaped primary particles are agglomerated; and a coating layer including a fiber-shaped lithium manganese composite oxide, wherein the fiber-shaped lithium manganese composite oxide is attached to the surface of the lithium nickel-based composite oxide.

Abstract: A ternary precursor of a lithium ion battery as well as a preparation method and preparation device thereof are provided. A chemical general formula of the ternary precursor is NixCoyMnz(OH)2, 0.5?x?0.9, 0.05?y?0.3, and x+y+z=1. A particle size D50 of a large-particle ternary precursor is 10.0-16.0 ?m, a particle size D50 of a small-particle ternary precursor is 3.0-6.0 ?m, and a span is 0.2-0.8. A nucleation and growth process of a crystal is regulated through a staged EDCF, a crystal particle size meeting specific requirements and compact particles without a cracking phenomenon can be obtained. A disc, inclined blades and an arc surface are combined, and an arc-shaped curved surface can effectively reduce a turbulence energy dissipation rate of a local area.

Abstract: A negative electrode for an electrochemical cell of a secondary lithium metal battery is manufactured by a method in which a precursor solution is applied to a major surface of a lithium metal substrate to form a precursor coating thereon. The precursor solution includes an organophosphate, a nonpolar organic solvent, and a lithium-containing inorganic ionic compound dissolved therein. At least a portion of the nonpolar organic solvent is removed from the precursor coating to form a protective interfacial layer on the major surface of the lithium metal substrate. The protective interfacial layer exhibits a composite structure including a carbon-based matrix component and a lithium-containing dispersed component. The lithium-containing dispersed component is embedded in the carbon-based matrix component and includes a plurality of lithium-containing inorganic ionic compounds, e.g., lithium phosphate (Li3PO4) and lithium nitrate (LiNO3).

Abstract: Metal-ion battery cells are provided that take advantage of the disclosed “doping” process. The cells may be fabricated from anode and cathode electrodes, a separator, and an electrolyte. A metal-ion additive may be incorporated into (i) one or more of the electrodes, (ii) the separator, or (iii) the electrolyte. The metal-ion additive provides additional donor ions corresponding to the metal ions stored and released by anode and cathode active material particles. An activation potential may then be applied to the anode and cathode electrodes to release the additional donor ions into the battery cell.