Abstract: A method (100) for producing a sintered component being a solid electrolyte and/or an electrode including titanium and sulfur for an all-solid state battery, the method including mixing powders (102) so as to obtain a powder mixture comprising titanium and sulfur, pressing (106) a component with the powder mixture, sintering (108) the component under a partial pressure of sulfur comprised between 200 Pa and 0.2 MPa so as to obtain an intermediate sintered component comprising titanium and sulfur, and sintering (114) the intermediate sintered component under a partial pressure of sulfur equal to or smaller than 150 Pa at a temperature plateau comprised between 200° C. and 400° C. so as to obtain a sintered component comprising titanium and sulfur, the solid electrolyte exhibiting the peaks in positions of 2?=15.08° (±0.50°), 15.28° (±0.50°), 15.92° (±0.50°), 17.5° (±0.50°), 18.24° (±0.50°), 20.30° (±0.50°), 23.44° (±0.50°), 24.48° (±0.50°), and 26.66° (±0.

Abstract: Battery cells are provided that can include: a housing defining a chamber having a fluid inlet and outlet; an anode at one side of the housing; a cathode at another side of the housing opposing and spaced apart from the anode a sufficient amount to allow for electrolyte between the anode and cathode; and the other side of the chamber defined by an ion permeable member. Methods for in situ battery electrode analysis are provided and these methods can include: providing a battery cell having an anode and a cathode; exposing the battery cell to an ion beam while the battery cell is operational to form secondary ions; and detecting the secondary ions to analyze the battery.

Abstract: A lithium secondary battery comprises a cathode, an anode, a separator and a nonaqueous electrolyte solution. The cathode includes a first cathode active material in which at least one of metals included in the first cathode material has a concentration gradient region between a central portion and a surface portion, and a second cathode active material having a single particle structure. The lithium secondary battery has improved life-span and penetration stability.

Abstract: An energy storage device includes a coated anode. The coated anode includes a metallic anode in contact with an electrically non-conductive star polymer coating. The star polymers in the star polymer coating include a core with at least 3 arms attached to the core. At least some of the arms of the star polymers have ionically conductive polar functional groups. The energy storage device further includes a cathode and an electrolyte in contact with both the cathode and the coated anode.

Abstract: A multi-layer cathode coating for positive electrode of a rechargeable electrochemical cell (or secondary cell) (such as a lithium-ion secondary battery) and a secondary battery including a cathode having a multi-layer cathode coating. Multi-layer cathode coatings containing blends of one or more cathode active materials in certain weight ratios thereof.

Abstract: Disclosed is a method for manufacturing a dry electrode. The method allows determination of the micro-fibrilization degree of a binder resin from the crystallinity of the binder resin. Based on this, the processing conditions of mixed powder for electrode or an electrode film may be controlled. In this manner, it is possible to check and control the processing conditions easily and efficiently. In addition, the method for manufacturing a dry electrode includes a kneading step using a kneader under a low speed and high temperature and pulverization step. Therefore, there is no problem of blocking of a flow path caused by aggregation of the ingredients, which is favorable to mass production.

Abstract: A ternary cathode material, a preparation method thereof, and a lithium ion battery are provided. The ternary cathode material comprises a micron-sized single-crystalline particle structure of LiNi1-x-y-zCoxMnyMzO2, wherein 0.6<1-x-y-z<1.0, 0<x<0.2, 0<y<0.3, and 0<z<0.1; and the single-crystalline particle structure comprises a central area and surface layer area, wherein the molar ratio of elements in the central area meets Ni:Co:Mn:M=a1:x1:y1:z1, and the molar ratio of elements in the surface layer area meets Ni:Co:Mn:M=a2:x2:y2:z2, in which 0.85?a1<1.0, 0<x1?0.1, 0<y1?0.15, 0?z1?0.05, 0.3?a2?0.7, 0.2?x2, y2?0.4, and 0?z2?0.05, provided that z1 and z2 are not simultaneously zero, and a1/(a1+x1+y1+z1)>a2/(a2+x2+y2+z2); and M comprises at least one selected from Al, Mg, Ti, Ga, Nb, Zr, W, Mo and Ta.

Abstract: An energy storage device includes an anode; a cathode; an electrolyte in contact with both the anode and the cathode; and an electrically non-conductive, porous separator between the anode and the cathode. At least one major surface of the porous separator includes a coating with a layer having a star polymer. The star polymer includes a hydrophobic core and at least three arms, wherein at least some of the arms includes ion-conductive polar functional groups.

Abstract: The present invention relates to a positive electrode active material having improved capacity characteristic and life cycle characteristic, and a method of preparing the same, and specifically, to a positive electrode active material for a lithium secondary battery, wherein the positive electrode active material comprises a compound represented by Formula 1 above and allowing reversible intercalation/deintercalation of lithium, and from a crystal structure analysis of the positive electrode active material by a Rietveld method in which space group R-3m is used in a crystal structure model on the basis of an X-ray diffraction analysis, the thickness of MO slab is 2.1275 ? or less, the thickness of inter slab is 2.59 ? or greater, and the cation mixing ratio between Li and Ni is 0.5% or less, and a method of preparing the same.

Abstract: The invention discloses a method for synthesizing a lithium ferromanganese phosphate composite material. The method produces a lithium ferromanganese phosphate composite material and resolves prior art issues of low molecular surface area and easy water absorption of the product. Furthermore, it minimizes prior method's difficult or expensive steps and lack of flexible control of the iron to manganese ratio within the lithium ferromanganese phosphate compound. In this method, many milling and sintering steps are taken to increase the compound's molecular surface area. Furthermore, selected carbon additives resolve the low conductivity brought about by low molecular surface area. As well, a hydrophobic material is coated on the surface of lithium ferromanganese phosphate to insulate it from outside moisture.

Abstract: Disclosed herein is electrode comprising a current collector comprising a conductor layer having at least a first surface; and elongated metal carbide nanostructures extending from the first surface; and a carbonaceous energy storage media disposed on the first surface and in contact with the elongated metal carbide nanostructures. Disclosed herein too is an ultracapacitor comprising at least one electrode comprising a current collector comprising a conductor layer having at least a first surface; and elongated metal carbide nanostructures extending from the first surface; and a carbonaceous energy storage media disposed on the first surface and in contact with the elongated metal carbide nanostructures.

Abstract: According to one embodiment, there is provided an electrode including active material particles, polymer fibers and inorganic solid particles. The polymer fibers have an average fiber diameter of 1 nm to 100 nm.

Abstract: Disclosed is a negative electrode current collector for an anode-free lithium metal battery. The negative electrode current collector includes a PdTe2 layer and an intermediate layer to inhibit the growth of lithium dendrite, resulting in significant improves in lifespan and performance of the lithium metal battery. The negative electrode current collector further includes an ion conductive layer to improve the performance of the lithium metal battery.

Abstract: Disclosed herein is electrode comprising a current collector comprising a conductor layer having at least a first surface; and elongated metal carbide nanostructures extending from the first surface; and a carbonaceous energy storage media disposed on the first surface and in contact with the elongated metal carbide nanostructures. Disclosed herein too is an ultracapacitor comprising at least one electrode comprising a current collector comprising a conductor layer having at least a first surface; and elongated metal carbide nanostructures extending from the first surface; and a carbonaceous energy storage media disposed on the first surface and in contact with the elongated metal carbide nanostructures.

Abstract: This cathode active material for a secondary battery using a non-aqueous electrolyte includes nickel-rich lithium transition-metal oxide, exhibits a hard X-ray photoelectron spectroscopy (HAXPES) peak of 1,560 to 1,565 eV in binding energy from an Al-rich layer, using a photon energy of 6 KeV, and with respect to the mean particle diameter r of the lithium transition-metal oxide particle, the Al concentration is approximately constant within 0.35r of the center.

Abstract: The present disclosure provides a positive electrode of lithium-ion battery, an all-solid-state lithium-ion battery and a preparation method thereof, and an electrical device. The all-solid-state lithium-ion battery of the present disclosure includes a positive electrode, a solid electrolyte, and a negative electrode; wherein the positive electrode includes a positive electrode current collector and a positive electrode material layer provided on a surface of the positive electrode current collector, a positive electrode active material in the positive electrode material layer is a manganese oxygen compound; and the negative electrode includes a negative electrode current collector and a negative electrode material layer provided on a surface of the negative electrode current collector, a negative electrode active material in the negative electrode material layer is a titanium oxygen compound.

Abstract: Provided is an anode active material, including: an amorphous carbon material in which the ratio of moieties having a distance d002 of 3.77 ? or more between crystal planes is 4% to 15% based on the entire crystal plane distance distribution. When the anode active material is used, the lifespan characteristics of a lithium battery may be improved while exhibiting high capacity.

Abstract: A method of making a negative electrode material for an electrochemical cell that cycles lithium ions is provided that includes centrifugally distributing a molten precursor comprising silicon and lithium by contacting the molten precursor with a rotating surface in a centrifugal atomizing reactor. The molten precursor is solidified to form a plurality of substantially round solid electroactive particles comprising an alloy of lithium and silicon and having a D50 diameter of less than or equal to about 20 micrometers. In certain variations, the negative electroactive material particles may further have one or more coatings disposed thereon, such as a carbonaceous coating and/or an oxide-based coating.

Abstract: In some implementations, a cathode is formed by (1) providing a cathode additive including (a) a matrix including a lithium compound, and (b) metal nanostructures embedded in the matrix; and (2) combining the cathode additive with a cathode active material to form a mixture. In other implementations, a cathode is formed by (1) providing a cathode additive including a compound of lithium and at least one non-metal or metalloid; and (2) combining the cathode additive with a cathode active material to form a mixture.

Abstract: A main object of the present disclosure is to provide an anode layer with little resistance increase due to charge and discharge. In the present disclosure, the above object is achieved by providing an anode layer comprising: an anode active material including a Nb element, a W element, and an O element; and a solid electrolyte, and an expansion coefficient of the anode active material when charged to 200 mAh per 1 g is 1.4% or more and 5% or less.

Abstract: Provided is a lithium ion secondary battery having high energy density and excellent cycle characteristics. The present invention relates to a negative electrode for a lithium ion secondary battery comprising: (i) a negative electrode mixture layer comprising a negative electrode active material and a negative electrode binder and (ii) a negative electrode current collector, wherein the negative electrode active material comprises an alloy comprising silicon (Si alloy), the Si alloy is crystalline and has a median diameter (D50 particle size) of 1.2 ?m or less, and an amount of the negative electrode binder based on the weight of the negative electrode mixture layer is 12% by weight or more and 50% by weight or less.

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 powderous positive electrode material for a lithium secondary battery has the general formula Li1+x[Ni1?a?b?cMaM?bM?c]1?xO2?z. M is one or more elements of the group Mn, Zr and Ti. M? is one or more elements of the group Al, B and Co. M? is a dopant different from M and M?, and x, a, b and c are expressed in mol with ?0.02?x?0.02, 0?c?0.05, 0.10?(a+b)?0.65 and 0?z?0.05. The material has an unconstrained cumulative volume particle size distribution value (?0(D10P=0)), a cumulative volume particle size distribution value after having been pressed at a pressure of 200 MPa (?P(D10P=200)) and a cumulative volume particle size distribution value after having been pressed at a pressure of 300 MPa (?P(D10P=300)). When ?P(D10P=200) is compared to ?0(D10P=0), the relative increase in value is less than 100%. When ?P(D10P=300) is compared to ?0(D10P=0), the relative increase in value is less than 120%.

Abstract: Provided is a lithium-conductive solid-state electrolyte material that comprises a sulfide compound of a composition that does not deviate substantially from a formula of Li9S3N. The compound's conductivity is greater than about 1×10?7 S/cm at about 25° C. and is in contact with a negative electroactive material. Also provided is an electrochemical cell that includes an anode layer, a cathode layer, and the electrolyte layer between the anode and cathode layers. In an example, the material's activation energy can be no greater than about 0.52 eV at about 25° C.

Abstract: A poly(vinylphosphonic acid) (PVPA)?(NH4)2MoO4), gel polymer electrolyte can be prepared by incorporating redox-mediated Mo, or similar metal, into a PVPA, or similar polymer, matrix. Gel polymer electrolytes including PVPA/MoX, x representing the percent fraction Mo in PVPA, can be used to make supercapacitors including active carbon electrodes. The electrolytes can be in gel form, bendable and stretchable in a device. Devices including this gel electrolyte can have a specific capacitance (Cs) of 1276 F/g, i.e., a more than 50-fold increase relative to a PVPA system without Mo. A PVPA/Mo10 supercapacitor can have an energy density of 180.2 Wh/kg at power density of 500 W/kg, and devices with this hydrogel structure may maintain 85+% of their initial capacitance performance after 2300 charge-discharge cycles.

Abstract: A lithium secondary battery which is made of an anode-free battery and includes lithium metal formed on a negative electrode current collector by charging. The lithium secondary battery includes the lithium metal formed on the negative electrode current collector in a state of being shielded from the atmosphere, so that the generation of a surface oxide layer (native layer) formed on the negative electrode according to the prior art does not occur fundamentally, thereby preventing the deterioration of the efficiency and life characteristics of the battery.

Abstract: An apparatus containing at least one electrochemical cell with an electrode structure. The electrode structure contains at least one carbide chemical compound. The carbide chemical compound may be a salt-like carbide. The electrode may contain at least one electronically conductive element different from the carbide. Carbon compositions of various forms may be formed by the methods and apparatus using the electrode structure. Large pieces of pure carbon may be produced. Post-reaction processing of the carbon may be carried out such as exfoliation.

Abstract: A lithium-ion capacitor (LIC) is provided which includes positive electrodes, negative electrodes pre-loaded on surface with lithium sources including lithium strips and ultra-thin lithium films having holes, separators and organic solvent electrolyte with lithium salt for high performance including high energy density, high power density, long cycle life, long DC life and wide temperature ranges. A method for making an LIC is also provided, where cell components important to optimize the electrochemical performance of LIC's are configured, said components include PE active material and binders, NE active material and binders, thickness/mass ratio of positive electrode (PE) to negative electrode (NE) active layers, PE and NE's size designs and layer numbers, types of material for Separators and NE pre-lithiation methods, NE pre-lithiation includes loading various lithium (Li) sources including lithium strips and ultra-thin lithium films having holes onto the surface of NE.

Abstract: Previous hybrid-anion and cation-redox (HACR) cathodes were limited in cycling performance by irreversible anionic redox reactions caused by the loss of anions. To overcome this limitation, a lithium (Li) transition metal (M) oxide particle is described having a Li concentration gradient. In one example, the particle includes a Li-rich core region that provides capacity and energy density due anionic and cationic contributions and a Li-poor surface region surrounding the core region to inhibit anionic activity and thus substantially reduce the loss of anions. A gradient region disposed between the core and surface regions has a Li concentration profile that varies from a first Li concentration in the core region to a second Li concentration in the surface region. A high-temperature leaching method may be used to leach LiO from a Li-rich Li1+xM1?XO2 particle, thus forming a coherent Li gradient with a stabilized layered structure.

Abstract: A noble metal-free water oxidation electrocatalyst can be stable and obtained from earth-abundant materials, e.g., using copper-colloidal nanoparticles. The catalyst may contain nanobead and nanorod morphological features with narrow size distribution. The onset for oxygen evolution reaction can occur at a potential of 1.45 VRHE (?=220 mV). Such catalysts may be stable during long-term water electrolysis and/or exhibit a high electroactive area, e.g., with a Tafel slope of 52 mV/dec, TOF of 0.81 s?1, and/or mass activity of 87 mA/mg. The copper may also perform CO2 reduction at the cathode side. The Cu-based electrocatalytic system may provide a flexible catalyst for electrooxidation of water and for chemical energy conversion, without requiring Pt, Ir, or Ru.

Abstract: A positive electrode active material contains a lithium-rich lithium manganese-based oxide represented by chemical formula (1), Li1+aNixCoyMnzMvO2?bAb??(1) wherein, 0<a?0.2, 0<x?0.4, 0<y?0.4, 0.5?z?0.9, 0?v?0.2, a+x+y+z+v=1, and 0?b?0.5; M is one or more elements selected from the group consisting of Al, Zr, Zn, Ti, Mg, Ga, In, Ru, Nb, and Sn; and A is one or more elements selected from the group consisting of P, N, F, S and Cl; and a coating layer formed on a surface of the lithium-rich lithium manganese-based oxide, wherein the coating layer contains a lithium-deficient transition metal oxide in a lithium-deficient state having a molar ratio of lithium to transition metal of less than 1 is formed on the surface of the lithium-rich lithium manganese-based oxide, and wherein the content of the coating layer is 1% to 10% by weight based on the total weight of the positive electrode active material.

Abstract: A secondary battery includes: a first oxide semiconductor having a first conductivity type; a first charging layer disposed on the first oxide semiconductor layer, and composed by including a first insulating material and a second oxide semiconductor having the first conductivity type; a second charging layer disposed on the first charging layer; a third oxide semiconductor layer having a second conductivity type disposed on the second charging layer; and a hydroxide layer disposed between the first charging layer and the third oxide semiconductor layer, and containing a hydroxide of a metal constituting the third oxide semiconductor layer. The highly reliable secondary battery is capable of improving an energy density and increasing battery characteristics (electricity accumulation capacity).

Abstract: A positive electrode material for a lithium ion secondary battery includes an olivine-type phosphate-based compound represented by General Formula LixAyDzPO4 and carbon, and, in transmission electron microscopic observation of a cross section of a secondary particle that is an agglomerate of primary particles of the olivine-type phosphate-based compound, a 300-point average value of filling rates of the carbon that fills insides of voids having a diameter of 5 nm or larger that are formed by the primary particles is 30 to 70%. A is any one of Co, Mn, Ni, Fe, Cu, and Cr, D is any one of Mg, Ca, Sr, Ba, Ti, Zn, B, Al, Ga, In, Si, Ge, Sc, and Y, and x, y, and z satisfy 0.9<x<1.1, 0<y?1.0, 0?z<1.0, and 0.9<y+z<1.1.

Abstract: According to one embodiment, an electrode is provided. The electrode includes an active material-containing layer. The active material-containing layer includes an active material and a conductive agent. The active material contains primary particles of a niobium-titanium composite oxide. The conductive agent contains fibrous carbon. The primary particles have an average particle size of 0.3 ?m or more and 2 ?m or less. At least a part of a surface of the primary particles is coated with the fibrous carbon. A covering ratio of the primary particles by the fibrous carbon is 0.01% or more and 40% or less.

Abstract: High-performance flexible batteries are promising energy storage devices for portable and wearable electronics. The major obstacle to develop flexible batteries is the shortage of flexible electrodes with excellent electrochemical performance. Another challenge is the limited progress in the flexible batteries beyond Li-ion because of safety concerns for the Li-based electrochemical system. Accordingly, a self-supported tin sulfide (SnS) porous film (PF) was fabricated as a flexible cathode material in Al-ion battery, which delivers a high specific capacity of 406 mAh/g. A capacity decay rate of 0.03% per cycle was achieved, indicating a good stability. The self-supported and flexible SnS film also shows an outstanding electrochemical performance and stability during dynamic and static bending tests. Microscopic images demonstrated that the porous structure of SnS is beneficial for minimizing the volume expansion during charge/discharge.

Abstract: The present application relates to an anode active material and an anode, an electrochemical device and an electronic device using same. Specifically, the present application provides an anode active material, including a lithiated silicon-oxygen material and a coating layer, where there is at least a Si—O-M bond between the coating layer and the lithiated silicon-oxygen material, where M is selected from one or more of an aluminum element, a boron element and a phosphorus element. The anode active material of the present application has high stability and is suitable for aqueous processing to be prepared into an anode.

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: Provided by the present invention is a cathode material for a sodium-ion battery with a coating structure and a preparation method therefor. In the present invention, an Na3V2(PO4)3/C cathode material is prepared by means of a sol-gel method. Synthesized zwitterionic polymers may be used as chelating agents and as a carbon source; the process is simple, can quickly form a gel, and the reaction time is shortened contains a zwitterionic structure which may be well dissolved with the precursor of sodium vanadium phosphate to form a stable carbon coating layer. Compared to the prior art, the cathode material for a sodium-ion battery of the present invention enhances the electrical conductivity and cycle performance of the cathode material by means of the doping of nitrogen and sulfur on carbon. At the same time, the prepared cathode material for a sodium-ion battery has sodium vacancies and maintains a stable structure during the process of sodium-ion intercalation/deintercalation.

Abstract: When spinel-type lithiated cobalt oxide is employed for a cathode active material for a lithium ion battery, a sufficient discharge capacity is not always obtained. Thus, spinel-type lithiated cobalt oxide is doped with at least chromium, and specifically, a cathode active material for a lithium ion battery includes a spinel-type crystal phase including lithium, cobalt, chromium and oxygen, and the cathode active material has a composition represented by LiCoxCryMzO2±? where M is at least one selected from Al and Mn, and 0.85?x<1, 0<y?0.15, 0?z, and 0.85<x+y+z?1.2.

Abstract: An anode for an energy storage device includes a current collector having a metal layer; and a metal oxide layer provided in a first pattern overlaying the metal layer. The anode further includes a patterned lithium storage structure having a continuous porous lithium storage layer selectively overlaying at least a portion of the first pattern of metal oxide. A method of making an anode for use in an energy storage device includes providing a current collector having a metal layer and a metal oxide layer provided in a first pattern overlaying the metal layer. A continuous porous lithium storage layer is selectively formed by chemical vapor deposition by exposing the current collector to at least one lithium storage material precursor gas.

Abstract: To provide a lithium-containing composite oxide capable of obtaining a lithium ion secondary battery having a large discharge capacity wherein the deterioration of the discharge voltage due to repetition of a charge and discharge cycle is suppressed, a cathode active material, a positive electrode for a lithium ion secondary battery and a lithium ion secondary battery. A lithium-containing composite oxide, which is represented by the formula I: LiaiNibCOcMndMeO2??Formula I, wherein M is at least one member selected from the group consisting of Na, Mg, Ti, Zr, Al, W and Mo, a+b+c+d+e=2, 1.1?a/(b+c+d+e)?1.4, 0.2?b/(b+c+d+e)?0.5, 0?c/(b+c+d+e)?0.25, 0.3?d/(b+c+d+e)?0.6, and 0?e/(b+c+d+e)?0.1, and wherein the valence of Ni is from 2.15 to 2.45.

Abstract: The present invention provides a Li-ion secondary cell negative-electrode material with which it is possible to adequately suppress reductive decomposition of a liquid electrolyte by an active material during charging, the Li-ion secondary cell negative-electrode material exhibiting a high discharge capacity that exceeds the theoretical capacity of graphite and exceptional initial charging efficiency and cycle characteristics. In this negative-electrode material for a Li-ion secondary cell, the surfaces of particles of SiOx (O?x<2) contain Li and at least one metallic element M selected from among Si, Al, Ti, and Zr, and have a coating of a Li-containing oxide comprising a composition in which M/Li>5 with respect to the molar ratio.

Abstract: A solid-state battery includes an anode current collector and an anode layer on the anode current collector. The anode layer comprises anode active material composed of anode active particles each encapsulated in a solid ion conductor. The solid-state battery also includes a cathode current collector and a cathode layer on the cathode current collector. The cathode layer comprises cathode active material composed of cathode active particles each encapsulated in the solid ion conductor. A solid electrolyte structure separating the anode layer and the cathode layer has anode-side columns and cathode-side columns aligning parallel to a stacking axis of the solid-state battery, the anode-side columns extending into the anode layer and the cathode-side columns extending into the cathode layer.

Abstract: A positive electrode active material includes a core and a coating disposed on at least a portion of a surface of the core. The core includes a lithium metal oxide, a lithium metal phosphate, or a combination thereof. The coating includes a compound according to the formula LimM1nXp, wherein M1, X, m, n and p are as defined herein. Also, an electrochemical cell including the positive electrode active material, and methods for the manufacture of the positive electrode active material and the electrochemical cell.

Abstract: A multi-layer negative electrode according to an embodiment of the present disclosure includes: a current collector configured to transmit electrons between an outer lead and a negative electrode active material; a first negative electrode mixture layer formed on one surface or both surfaces of the current collector and including a first negative electrode active material and a first binder; and a second negative electrode mixture layer formed on the first negative electrode mixture layer and including a second negative electrode active material, wherein the first negative electrode mixture layer has an electrode density of about 0.9 to 2.0 g/cc and the second negative electrode mixture layer has an electrode density of about 0.2 to 1.7 g/cc, which is a range lower than that of the electrode density of the first negative electrode mixture layer. The multi-layer negative electrode can be included in a lithium secondary battery.

Abstract: A method of producing a nickel-cobalt composite hydroxide includes: preparing a first solution containing nickel ions and cobalt ions; preparing a second solution containing tungsten ions and having a pH of 10 or more; preparing a third solution containing a complex ion-forming factor; preparing a liquid medium having a pH in a range of 10 to 13.5; supplying the first solution, the second solution, and the third solution separately and simultaneously to the liquid medium to obtain a reacted solution having a pH in a range of 10 to 13.5; and obtaining the nickel-cobalt composite hydroxide containing nickel, cobalt, and tungsten from the reacted solution.

Abstract: A composition for forming an electrode. The composition includes a hybrid active material compound doped with a dopant. The hybrid active material comprises the reaction product of a metal fluoride compound and a metal complex. A method of making the composition is included.

Abstract: Disclosed are electrochemical devices and methods for making electrochemical devices such as metal infiltrated electrodes for solid state lithium ion and lithium metal batteries. In one method for forming an electrode, a metal is infiltrated into the pore space of the active material of the electrode providing improved electronic conductivity to the electrode. The electrode may also include a solid-state ion conducting material providing improved ion conductivity to the electrode. Before infiltration of the metal, a stabilization coating may be applied to the active material and/or the solid-state ion conducting material to the stabilize electrode interfaces by slowing, but not eliminating, the chemical reactions that occur at elevated temperatures during sintering of the active material and/or the solid-state ion conducting material forming the electrode.

Abstract: An active material according to one aspect of the present invention includes a core region; and a shell region, in which an amount of transition metals in the core region is more than an amount of transition metals in the shell region, and an amount of oxygen deficiency in the shell region is more than an amount of oxygen deficiency in the core region.

Abstract: A lithium-ion secondary battery including positive and negative electrodes, a separator element, an electrical conductor element and a binder, wherein the positive electrode includes a lithium-containing metal phosphate compound coated with a carbon material having at least one phase selected from a graphene phase and an amorphous phase, and further includes carbon black and a fibrous carbon material and wherein the negative-electrode material includes a graphite carbon material having at least one carbon phase selected from a graphene phase and an amorphous phase, and further includes carbon black and a fibrous carbon material, and wherein the binder includes a water-soluble synthetic resin or a water-dispersible synthetic resin. The most preferred positive electrode includes LiFePO4, The most preferred negative electrode includes artificial graphite or graphitazable powder. The most preferred binder is carboxyl methyl cellulose further including a surface active agent.