Abstract: A cell includes a jellyroll A and a jellyroll B. The jellyroll A is formed by laminating a first positive-electrode sheet, a separator, a negative-electrode sheet, and another separator sequentially; the jellyroll B comprises a first portion of laminates and a second portion of laminates laminated on the first portion of laminates. The first portion of laminates is formed by laminating a first positive-electrode sheet, a separator, a negative-electrode sheet, and another separator sequentially; the second portion of laminates is formed by laminating a ternary positive-electrode sheet, a separator, a negative-electrode sheet, and another separator sequentially.

Abstract: Disclosed in the present disclosure is a positive electrode active material and a lithium-ion battery, the positive electrode active material comprising lithium iron phosphate coated with carbon layer, and an ID/IG value of the positive electrode active material is 0.75-1.2, wherein a peak intensity at a wave number of 1360 cm?1 is considered as ID and a peak intensity at a wave number of 1580 cm?1 is considered as IG in a Raman spectrum of the positive electrode active material.

Abstract: Disclosed is a composite lithium iron phosphate material, and a positive electrode and a lithium ion battery using the same. The composite lithium iron phosphate material is made of a composition comprising an iron phosphate precursor, a lithium source, and a carbon source, the carbon source covers the iron phosphate and the lithium source, the carbon source includes a synthetic polymer carbon source and a biomass carbon source, and the biomass carbon source includes carbon fibers.

Abstract: Disclosed in the present disclosure is an iron manganese phosphate precursor and preparation method thereof and application thereof. The preparation method includes: adding phosphorus source, organic manganese source and organic iron source to organic solvent to obtain a mixed solution; dissolving doping element compounds into water, adding starch therein, and heating until being gelatinized to form a sol; mixing the mixed solution and the sol under heating conditions to obtain a mixed system, adjusting the mixed system to alkaline, and carrying out a reaction; and drying and calcining after the reaction to obtain an iron manganese phosphate precursor.

Abstract: A cell includes a positive-electrode sheet, a separator, and a negative-electrode sheet. The positive-electrode sheet includes a positive-electrode collector and a positive-electrode active material layer disposed on each of two surfaces of the positive-electrode collector; the positive-electrode active material layer includes a first active material layer and a second active material layer laminated on the first active material layer; and the first active material layer is in direct contact with a surface of the positive-electrode collector. The first active material layer comprises a ternary active material, the ternary active material has a specific surface area of 0.3-0.9 m2/g; the second active material layer comprises a lithium manganese iron phosphate material, the lithium manganese iron phosphate material has a specific surface area of 20-24 m2/g.

Abstract: Disclosed are a lithium manganese iron phosphate material, a preparation method thereof, and a lithium battery. The lithium manganese iron phosphate material includes a core and a coating layer on the core. A material of the core includes Li, M, and PO4 in a non-stoichiometric ratio, M is FeyMnxDz, in which D is a metal. The coating layer includes a carbon material. The lithium manganese iron phosphate material has good structural stability, actual capacity per gram, and cycle life.

Abstract: Disclosed are a lithium manganese iron phosphate material, a preparation method thereof, and a lithium battery. The lithium manganese iron phosphate material includes a core and a coating layer on the core. A material of the core includes Li, Fe, Mn, Nb, and PO4 in a non-stoichiometric ratio, and a material of the coating layer includes any one or a combination of two of LiNbO3 and Li3NbO4.

Abstract: A composite positive-electrode material includes LMFP and LFP. The LMFP has a primary particle size in a range of 20 nm-200 nm. The LFP has a primary particle size in at least two ranges of: 100 nm-200 nm; 200 nm-350 nm; 350 nm-500 nm; and 500 nm-1000 nm. The primary particle size of the LFP is larger than the primary particle size of the LMFP.

Abstract: Disclosed are a negative electrode slurry composition and application. The negative electrode slurry composition includes a solvent and negative electrode material components dispersed in the solvent. The negative electrode material components include a negative electrode active substance, a conductive agent, a dispersant, and a binder. The binder includes a binder A and a binder B. The binder A is at least one of polyacrylic acid, polyacrylic salt, polyacrylate, polyacrylonitrile, or polyimide binders. A monomeric unit contained in the binder B is at least one of an aromatic vinyl monomeric unit, an aromatic conjugated diene monomeric unit, an alkenyl unsaturated carboxylic acid monomeric unit, an unsaturated alkyl carboxylate monomeric unit, or an acrylonitrile monomeric unit.

Abstract: Provided in the present application is an electrolyte and lithium-ion battery, the electrolyte including a fluorosultones compound as shown in Formula 1. The electrolyte prepared in the present application is applied to lithium iron manganese phosphate batteries, which effectively suppresses the dissolution of manganese in lithium iron manganese phosphate materials, and significantly improves the high-temperature storage performance and high-temperature cycling performance of the batteries.

Abstract: This disclosure provides a composite positive electrode material and a preparation method and application thereof. The method includes the following steps: (1) mixing a first lithium source, a manganese source, an iron source, and a phosphorus source with a solvent to obtain a lithium manganese iron phosphate precursor, performing thermal treatment on the lithium manganese iron phosphate to obtain lithium manganese iron phosphate powder, mixing a nickel cobalt manganese hydroxide with a second lithium source, and performing sintering treatment to obtain a nickel-cobalt-lithium manganese oxide positive electrode material; (2) mixing the lithium manganese iron phosphate powder and lithium nickel cobalt manganese oxide positive electrode material obtained in step (1) with a metal-organic framework (MOF) material, and stirring to obtain mixed powder; and (3) performing calcination treatment on the mixed powder obtained in step (2) to obtain the composite positive electrode material.

Abstract: A modified lithium manganese iron phosphate positive electrode material and a preparation method and an application thereof are provided. The modified lithium manganese iron phosphate positive electrode material includes a doped lithium manganese iron phosphate core; and a coating layer disposed on a surface of the doped lithium manganese iron phosphate core. The doped lithium manganese iron phosphate core comprises an Nb element, and the coating layer comprises LiNbO3 and Nb2O5.

Abstract: Provided in the present application is an electrolyte and lithium-ion battery. The electrolyte includes a compound as shown in formula 1, in which R1 is selected from any one of C1-C6 fully or partially substituted fluoroalkyl, and R2 and R3 are independently selected from any one of a hydrogen atom, an alkane, a phenyl, an alkylbenzene, or a methoxysilane respectively.

Abstract: The present invention discloses a lithium battery, which comprises of a positive electrode plate, a negative electrode current collector substrate, a separator and electrolyte between the positive electrode plate and the negative electrode current collector substrate. The positive electrode plate comprises a positive electrode collector, a positive electrode active material-containing positive electrode layer attached to the positive electrode collector and positive electrode tab welded to the positive electrode collector. The negative electrode current collector substrate comprises a negative electrode current collector and negative electrode tab welded to the negative electrode current collector. The negative electrode current collector substrate is a current collector substrate with 6˜60 ?m thickness having a planar or concavo-convex structure which is made from metal foil material or metal mesh with 6˜25 ?m thickness.

Abstract: The present invention discloses a lithium battery, which comprises of a positive electrode plate, a negative electrode current collector substrate, a separator and electrolyte between the positive electrode plate and the negative electrode current collector substrate. The positive electrode plate comprises a positive electrode collector, a positive electrode active material-containing positive electrode layer attached to the positive electrode collector and positive electrode tab welded to the positive electrode collector. The negative electrode current collector substrate comprises a negative electrode current collector and negative electrode tab welded to the negative electrode current collector. The negative electrode current collector substrate is a current collector substrate with 6˜60 ?m thickness having a planar or concavo-convex structure which is made from metal foil material or metal mesh with 6˜25 ?m thickness.