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: Additives for energy storage devices comprising nitrogen-containing compounds are disclosed. The energy storage device comprises a first electrode and a second electrode, where at least one of the first electrode and the second electrode is a Si-based electrode, a separator between the first electrode and the second electrode, and an electrolyte composition. Nitrogen-containing compounds may serve as additives to the first electrode, the second electrode, and/or the electrolyte, as well as the separator.

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.

Abstract: A composite cathode active material includes a cathode active material particle; and a coating layer on a surface of the cathode active material particle, wherein the coating layer includes an acetate, wherein the acetate comprises an alkali metal acetate, an alkaline earth metal acetate, a transition metal acetate, or a combination thereof, or a derivative thereof.

Abstract: A positive electrode active material for a lithium ion battery comprises a lithium transition metal-based oxide powder, the powder comprising single crystal monolithic particles comprising Ni and Co and having a general formula Li1+a (Niz Mny Cox Zrq Ak)1?a O2, wherein A is a dopant, ?0.025?a<0.005, 0.60?z?0.95, y?0.20, 0.05?x?0.20, k?0.20, 0?q?0.10, and x+y+z+k+q=1. The particles have a cobalt concentration gradient wherein the particle surface has a higher Co content than the particle center.

Abstract: The invention provides a positive electrode active material for a lithium ion battery, comprising a lithium transition metal-based oxide powder, the powder comprising single crystal monolithic particles comprising Ni and Co and having a general formula Li1+a ((Niz (Ni1/2 Mn1/2)y Cox)1?kAk)1-a 02, wherein A is a dopant, ?0.02<a?0.06, 0.10?x?0.35, 0?z?0.90, x+y+z=1 and k?0.01, the particles having a cobalt concentration gradient wherein the particle surface has a higher Co content than the particle center.

Abstract: Provided are electrochemically active materials capable of absorbing and desorbing an ion suitable for use in secondary cells. The provided materials include a core consisting of a plurality of silicon particulates of a particle size less than 1 micrometer, the particulates intermixed with and surrounded by a silicon metal alloy composite, and an electrochemically active buffering shell layer enveloping at least a portion of the core such that the resulting electrochemically active material has an overall particle size with a maximum linear dimension of greater than one micrometer.

Abstract: A lithium secondary battery includes: a cathode, an anode; and an electrolyte between the cathode and the anode, wherein the cathode includes a cathode active material represented by Formula 1 below, and the electrolyte includes a lithium salt, a non-aqueous solvent, and a compound represented by Formula 2, where x, y, z, M, A, L1, a1, and R1 to R4 are defined as described in the disclosure.

Abstract: (a) A battery including a power storage element and an electrolytic solution is assembled. (b) Initial charging is performed on the battery. (c) Alternate charging and discharging are performed on the battery after the initial charging. In the alternate charging and discharging, charging and discharging are alternately performed once or more respectively at a voltage between 4.0 V and 4.1 V and a current rate of 0.6 C or higher. The total number of times of charging and discharging is 3 or greater. The charging is performed such that the voltage changes by 0.05 V or higher and 0.1 V or lower whenever the charging is performed once. The discharging is performed such that the voltage changes by 0.05 V or higher and 0.1 V or lower whenever the discharging is performed once.

Abstract: A rechargeable electrochemical cell comprising a negative electrode and a positive electrode is described. The positive electrode comprises a product having as overall formula Lip(NixMnyCozMmAlnAa)O2±b, wherein M signifies one or more elements from the group Mg, Ti, Cr, V and Fe, wherein A signifies one or more elements from the group F, C, Cl, S, Zr, Ba, Y, Ca, B, Sn, Sb, Na and Zn, and wherein 0.9<(x+y+z+m+n+a)<1.1, b<0.02, 0.9<p<1.110, 0.30<x<0.95, (y+z)?0.09, 0?m?0.05, 0?a?0.05, and 0?n?0.15. The negative electrode comprises composite particles, wherein the composite particles comprise silicon-based domains in a matrix material. The individual silicon-based domains are either free silicon-based domains that are not or not completely embedded in the matrix or are fully embedded silicon-based domains that are completely surrounded by the matrix material.

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 lithium manganese composite oxide having at least two crystal lattice structures, wherein the secondary particle has a regular array structure in which (003) planes of the primary particles are oriented in a vertical direction with respect to the surface of the secondary particle.

Abstract: A rust inhibitor for a gasket, a gasket for a secondary battery including the same, and a secondary battery are provided. The rust inhibitor includes an anti-rust material and a polymer resin, wherein the polymer resin includes at least one of polyethylene or a copolymer which includes 2 or more derived units selected from the group consisting of an ethylene-derived unit, a propylene-derived unit, a butylene terephthalate-derived unit, an ethylene terephthalate-derived unit, and a methyl acrylate-derived unit.

Abstract: Provided herein are energy storage devices high energy and power densities, cycle life, and safety. In some embodiments, the energy storage device comprise a non-flammable electrolyte that eliminate and/or reduce fire hazards for improved battery safety, with improved electrode compatibility with electrode materials.

Abstract: The present invention provides a manufacturing method of a lithium rechargeable battery, including (i) preparing a lithium metal electrode in which metal lithium (Li) is formed on one surface or both surfaces of a current collector; (ii) applying an electrolyte solution for coating including one or more lithium salts, one or more non-aqueous organic solvents, and one or more additives on a surface of the metal lithium to form a passive film which is a stable coat; (iii) manufacturing an electrode assembly including the lithium metal electrode as a negative electrode; and (iv) housing the electrode assembly in a rechargeable battery case and injecting an electrolyte solution for injection including one or more lithium salts, one or more non-aqueous organic solvents, and one or more additives to manufacture a rechargeable battery.

Abstract: In order to overcome the problems of influence of residual moisture, poor cycle performance and poor high-temperature storage performance in the existing lithium ion battery, the application provides a non-aqueous electrolyte for lithium ion battery, comprising a solvent, lithium salt and maleic anhydride copolymer, wherein the weight-average molecular weight of the maleic anhydride copolymer is less than or equal to 500,000; Furthermore, the percentage mass content of the maleic anhydride copolymer is 0.5% or more based on the total mass of the non-aqueous electrolyte being 100%. Meanwhile, the application also provides a lithium ion battery comprising the non-aqueous electrolyte. The non-aqueous electrolyte provided by the application is added with maleic anhydride copolymer with a content of more than 0.5% and a weight-average molecular weight of less than 500,000, so that the high-temperature storage and cycle performances of the lithium ion battery are effectively improved.

Abstract: There is provided a means capable of recovering a valuable material such as cobalt and nickel, with a low grade of a metal derived from a negative electrode current collector, a low grade of fluorine, and a low grade of a material derived from a negative electrode active material. A method for recovering a valuable material from a lithium ion secondary battery, is characterized in that it includes: a heat treatment step of performing heat treatment on a lithium ion secondary battery; a crushing step of crushing a heat-treated object obtained through the heat treatment step; a classification step of classifying a crushed object obtained through the crushing step into a coarse particle product and a fine particle product; and a wet magnetic separation step of performing wet magnetic separation on the fine particle product obtained through the classification step.

Abstract: The present invention states a method of producing new cathode materials for lithium ion batteries by recycling metals from depleted lithium-ion batteries using green reagents, and a method of deriving green reagents from agricultural products. The green reagents are used to replace corrosive acids that are used in the recycling process of depleted lithium-ion batteries. Metal ions, such as nickel, cobalt, manganese, and lithium are recovered as precipitates from the depleted lithium-ion batteries which can further be sintered to produce lithium-containing transition metal oxides that can be used as new cathode material for lithium-ion batteries.