Abstract: A gasket for a secondary battery includes a base resin and a rust inhibitor, wherein the base resin includes polybutylene terephthalate and the rust inhibitor includes an anti-rust material and a polymer resin, and the base resin and the polymer resin are different.

Abstract: Disclosed herein is a composite particulate comprising a plurality of active material particles; and a single graphene sheet or a plurality of graphene sheets surrounds the plurality of active material particles and a surface of the composite particulate, wherein a single graphene sheet or a plurality of graphene sheets provides an electron-conducting path.

Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery according to a configuration includes a lithium-transition metal composite oxide containing nickel (Ni) in an amount of greater than or equal to 80 mol %, in which boron (B) is present at least on a particle surface of the lithium-transition metal composite oxide. In the lithium-transition metal composite oxide, when particles having a larger particle size than a volume-based 70% particle size (D70) are first particles and particles having a smaller particle size than a volume-based 30% particle size (D30) are second particles, a coverage ratio of B on surfaces of the first particles is larger than a coverage ratio of B on surfaces of the second particles by 5% or greater.

Abstract: The cathode active material for a lithium secondary battery according to embodiments of the present invention includes lithium-transition metal composite oxide particles including a plurality of primary particles, and the lithium-transition metal composite oxide particles have a lithium-potassium-containing portion formed between the primary particles. Thereby, it is possible to improve life-span properties and capacity properties by preventing the layer structure deformation of the primary particles and removing residual lithium.

Abstract: The present invention relates to a positive active material for lithium secondary battery, its manufacturing method, and lithium secondary battery including the same, and it provides that a positive active material for lithium secondary battery, comprising: a core and a coating layer, wherein, the core is lithium metal oxide, the coating layer comprises boron, the boron compound in the coating layer comprises a lithium boron oxide and a boron oxide, the lithium boron oxide is included 70 wt % or more and 99 wt % in the entire coating layer, the lithium boron oxide comprises Li2B4O7, with respect to the lithium boron oxide 100 wt %, the content of Li2B4O7 is 55 wt % or more and 99 wt % or less.

Abstract: A secondary battery includes a positive electrode, a negative electrode, and an electrolyte. The positive electrode includes a positive-electrode active substance layer, the positive-electrode active substance layer contains a pre-lithiation agent, and a molecular formula of the pre-lithiation agent is LixNiaCu1?a?bMbO2, where 1?x?2, 0<a<1, and 0?b <0.1, and M is selected from one or more of Zn, Sn, Mg, Fe, and Mn. The negative electrode includes a negative-electrode active substance layer including graphite and silicon-containing material. The electrolyte contains fluoroethylene carbonate (FEC). A weight percentage of the pre-lithiation agent in the positive-electrode active substance layer, a weight percentage of silicon content in the negative-electrode active substance layer, and a weight percentage of FEC in the electrolyte satisfy 0.2×WSi?WFEC?7.5%?0.6×WL.

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. The secondary particle has a porous 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 3.0 to 4.0 [m2/g], and the porosity is more than 50 to 80[%].

Abstract: The present disclosure relates to prelithiated Si electrodes, methods of prelithiating Si electrodes, and use of prelithiated electrodes in electrochemical devices are described. There are several characteristics of electrode prelithiation that enable the superior battery performance. First, a prelithiated silicon anode is already in its expanded state during SEI formation, and therefore less of the SEI layer breaks down and reforms during cycling. Second, the prelithiated anode has a lower anode potential, which may also help the cycle performance of an electrochemical device.

Abstract: A lithium boron fluorophosphate complex compound including a compound A that is one selected from a group of lithium boron fluorophosphates represented by Formula (I), and a compound B that is one selected from a group of compounds represented by Formulae (II) to (IX). R0 represents a hydrocarbon group, R1 to R7 each independently represent a hydrogen atom or a substituent, R8, R9, R10, R11, and R13 to R21 each independently represent a substituent, and R12, R22, and R23 each independently represent a divalent linking group.

Abstract: A positive electrode active material for obtaining a lithium ion secondary battery, wherein capacity, electron conductivity, durability, and heat stability at the time of overcharge are improved, durability and heat stability being achieved at a high level, and including: a lithium nickel manganese composite oxide composed of secondary particles, in which a plurality of primary particles are flocculated, wherein the composite oxide is represented by a general formula (1): LidNi1-a-b-cMnaMbTicO2 (wherein, M is at least one kind of element selected from Co, W, Mo, V, Mg, Ca, Al, Cr, Zr and Ta, 0.05?a?0.60, 0?b?0.60, 0.02?c?0.08, 0.95?d?1.20), at least a part of titanium in the composite oxide is solid-solved in the primary particles, and, a lithium titanium compound exists on a surface of the positive electrode active material for the lithium ion secondary battery.

Abstract: Systems and methods utilizing aqueous-based polymer binders for silicon-dominant anodes may include an electrode coating layer on a current collector, where the electrode coating layer is formed from silicon and an aqueous-based suspension-solution binder composition comprising a water soluble (aqueous-based) polymer as part of a multi-component binder composition that also contains an water insoluble polymer. The electrode coating layer may include more than 70% silicon and the anode may be in a lithium ion battery.

Abstract: The present application discloses a lithium ion secondary battery comprising a positive electrode plate, a negative electrode plate, a separator and an electrolyte, wherein the positive electrode plate comprises a positive electrode current collector and a positive electrode film provided on at least one surface of the positive electrode current collector, and the positive electrode film comprises a first positive electrode active material represented by chemical formula Li1+xNiaCobMe1-a-bO2-yAy and a second positive electrode active material represented by chemical formula Li1+zMncN2-cO4-dBd; the positive electrode plate has a resistivity r of 3500 ?·m or less; and the electrolyte comprises a fluorine-containing lithium salt type additive. The lithium ion secondary battery provided by the present application is capable of satisfying high safety performance, high-temperature storage performance and cycle performance simultaneously.

Abstract: This application relates to a positive electrode plate and an electrochemical device. The positive electrode plate comprises a metal current collector, a positive electrode active material layer and a safety coating disposed between the metal current collector and the positive electrode active material layer; the safety coating comprises a polymer matrix, a conductive material and an inorganic filler; the positive electrode active material layer comprises Li1+xNiaCobMe(1?a?b)O2, wherein ?0.1?x?0.2, 0.6?a<1, 0<b<1, 0<(1?a?b)<1, and Me is at least one of Mn, Al, Mg, Zn, Ga, Ba, Fe, Cr, Sn, V, Sc, Ti and Zr; and the metal current collector is a porous aluminum-containing current collector. The positive electrode plate can improve safety and electrical performances of an electrochemical device (such as a capacitor, a primary battery, or a secondary battery).

Abstract: A metal-oxygen battery can provide improved energy storage and transportation applications due to high gravimetric energies, and such a metal-oxygen battery can include a polyolefin including a plurality of functional groups such as sulfamide, sulfoxy, carbonyl, phosphoramide or heterocyclic groups.

Abstract: A method for producing an all-solid multilayer battery, and an all-solid multilayer battery. The all-solid multilayer battery may be produced by depositing, by electrophoresis without any binder, at least one anode layer, at least one electrolyte layer, and at least one cathode layer. The at least one electrolyte layer, and the at least one cathode layer are obtained from a colloidal suspension containing nanoparticles that are not agglomerated with each other to create clusters and remain isolated from each other. A layer of Ms bonding material is then deposited on a surface of the at least one electrolyte layer. Next, two layers from the at least one dense anode layer, the at least one dense electrolyte layer, and the at least one dense cathode layer, are stacked face-to-face to obtain the all-solid multilayer battery having an assembly of a plurality of elementary cells connected with one another in parallel.

Abstract: This disclosure relates to the field of electrochemistry, and in particular, to a positive electrode material. The positive electrode material of this disclosure includes a substrate, with a formula of the substrate being LixNiyCozMkMepOrAm, where 0.95?x?1.05, 0.50?y?0.95, 0?z?0.2, 0?k?0.4, 0?p?0.05, 1?r?2, 0?m?2, m+r?2; a coating layer is disposed on the subs hate, where the coating layer includes a coating element; and absorbance of nickel leachate per unit mass of the positive electrode material w?0.7.

Abstract: In one embodiment, the present disclosure relates to a method of preparing a positive electrode active material, which includes mixing a nickel cobalt manganese hydroxide precursor containing nickel in an amount of 60 mol % or more based on a total number of moles of transition metals in the precursor, a lithium-containing raw material, and a doping raw material represented by Formula 2 (set forth herein), and sintering the mixture to prepare a positive electrode active material represented by Formula 1 (set forth herein).

Abstract: The present invention relates to a non-aqueous electrolyte for a lithium secondary battery and a lithium secondary battery comprising the same, the non-aqueous electrolyte comprising a non-aqueous organic solvent, a lithium salt, a first additive including at least one of compounds represented by chemical formulas 1 to 4, and a second additive comprising a cyclic sulfide-based compound, wherein the mixing ratio of the first additive and the second additive is a weight ratio of 0.2:1 to 10:1.

Abstract: A positive electrode active material includes a center portion including a first lithium transition metal oxide with an average composition represented by Formula 1, Li1+a1(Nib1Coc1Mnd1Ale1M1f1)O2??[Formula 1] wherein, in Formula 1, ?0.1?a1?0.2, 0.8?b1<1.0, 0<c1?0.2, 0<d1?0.1, 0<e1?0.05, 0?f1?0.05, b1/c1?25, and b1/d1?20, and M1 includes at least one selected from the group consisting of Mg, Ti, Zr, Nb, and W, and a surface portion including a second lithium transition metal oxide with an average composition represented by Formula 2, Li1+a2(Nib2Coc2Mnd2Ale2M1f2)O2??[Formula 2] wherein, in Formula 2, ?0.1?a2?0.2, 0.6?b2?0.95, 0?c2?0.2, 0?d2?0.1, 0?e2?0.05, 0?f2?0.05, b2/c2?13, and b2/d2?3, and M1 includes at least one selected from the group consisting of Mg, Ti, Zr, Nb, and W.

Abstract: A non-aqueous electrolyte secondary battery including electrode body having structure in which positive electrode and negative electrode are laminated with separator and non-aqueous electrolyte. The positive electrode includes positive electrode current collector, positive electrode active material layer which is disposed on positive electrode current collector and contains first positive electrode active material, and insulating layer which is disposed along one end of positive electrode active material layer in predetermined width direction, and contains inorganic filler and second positive electrode active material.