Btr New Material Group Co., Ltd.

Tencent Technology (shenzhen) Company Limited

Shenzhen Btr New Energy Materials Inc.

Dingyuan New Energy Technology Co., Ltd.

Liyuan (shenzhen) Scientific Research Co., Ltd.

Shenzhen Smoore Technology Limited

Xueqin He

Qiang Li

Xiaoping Li

Jianguo Ren

Chunlei Pang

Min Yue

Peng He

Youyuan Huang

Congwen Xiao

Tengyu Liang

Tao Xu

Lingrong Xiao

Zhiqiang Deng

Lijuan Qu

Haihui Zhou

Hang Dong

Zijun Zhang

Fangmai Zheng

Da Yao

Daofu Zhang

Wu Chen

Jingwei Wang

Caide Yang

Junhui Lai

Yiming Kong

Haifeng Yue

Xiaobing Xi

Shunyi Yang

Chengmao Xiao

Shutian Lyu

Runda Li

A negative electrode material includes a composite matrix material and a carbon coating coated on the composite matrix material. The composite matrix material includes lithium silicate, silicon oxide, an activator, and silicon embedded in the lithium silicate and the silicon oxide.

Negative electrode material, and preparation method therefor and use thereof

The present application provides a negative electrode material, a preparation method thereof, and a lithium ion battery. The negative electrode material comprises a first graphite core and a composite coating layer coated on the first graphite core. The composite coating layer comprises a second graphite inner layer formed on the surface of the first graphite core and an amorphous carbon outer layer formed on the surface of the second graphite inner layer. The second graphite inner layer is graphite microcrystal. The preparation method comprises: mixing the first graphite and the second graphite and performing the coating treatment to obtain the first graphite coated with the second graphite, wherein the second graphite is graphite microcrystals; and making the first graphite coated with the second graphite, coated with carbon, to obtain the negative electrode material. The negative electrode material provided in the present application utilizes the mutual cooperation between the second graphite inner layer and the amorphous carbon outer layer in the composite coating layer to make the negative electrode material have the high capacity, the low irreversible capacity, and the excellent power performance.

Negative electrode material and preparation method therefor, and lithium-ion battery

Anode material, preparation method thereof, and battery. Anode material includes graphite and carbon layer located on at least part of surface of graphite. Particle surface and particle section of anode material are respectively tested by Raman spectroscopy, peak area ratio of D characteristic peak within range of 1300 cmto 1350 cmto G characteristic peak within range of 1500 cmto 1580 cmis I/I, ratio of I/Imeasured on the particle surface is A, and ratio of I/Imeasured on particle section is B, and 1.22<A-B≤2.10. Particle surface of anode material is tested by adopting atomic force microscopy, 1 μm×1 μm test region is randomly selected on particle surface of anode material, arithmetic average value of height deviation absolute values relative to reference surface in test region is S nm, where 15 nm≤S≤60 nm. Anode material improves lithium-ion transport kinetics, initial Coulombic efficiency, and cycle performance.

Anode material, preparation method thereof and battery

Provided are a composite negative electrode material, a preparation method therefor and a lithium battery. The composite negative electrode material comprises silicon-containing particles and a carbon coating layer coating at least part of the surface of silicon-containing particles. In Raman spectrum, the composite negative electrode material has a silicon characteristic peak A between 450 cm-550 cm, a carbon characteristic peak B between 1300 cm-1400 cm, a carbon characteristic peak C between 1530 cm-1630 cm, and a graphene structure characteristic peak D between 2500 cm-2750 cm. The preparation method comprises: in protective atmosphere, introducing reaction gas to react with silicon-containing particles, the reaction temperature being 700° C.-1450° C., and the reaction gas comprising a carbon-containing gas, so that at least part of the surface of silicon-containing particles form a carbon coating layer, so as to obtain the composite negative electrode material.

Composite negative electrode material and preparation method therefor and lithium battery

The present disclosure relates to a porous nano-silicon-based composite material, an anode and a lithium ion battery and a preparation method thereof. The silicon-based composite material comprises nano active particles and graphite, and the nano active particles comprise porous nano-silicon; The graphite has a pore structure in which the nano active particles are embedded, and/or the graphite has a layered structure in which the nano active particles are embedded; Compared with the traditional carbon-coated silicon anode material, the silicon-based anode material prepared by the present disclosure has the advantage of lower expansion rate and thus improves cycle performance.

Silicon-based composite material, lithium ion battery, and preparation method thereof

A preparation method obtains silicon oxide/carbon composite negative electrode material and a lithium-ion battery. The silicon oxide/carbon composite negative electrode material is a secondary particle, and mainly consists of a SiOx/C material. The SiOx/C material includes SiOx particles and a carbon layer with which the surfaces of the SiOx particles are coated. The SiOx particles include Si crystallites. The preparation method includes: 1) synthesizing a silicon oxide bulk; 2) performing crushing to obtain micro-level or nano-level SiOx particles; 3) mixing with a carbon binder; 4) granulating; 5) modification and carbonization; and 6) post-processing.

Silicon oxide/carbon composite negative electrode material and preparation method therefor, and lithium-ion battery

The present application provides a silicon-oxygen composite negative electrode material and method for preparation thereof and lithium-ion battery. The silicon-oxygen composite negative electrode material comprises a silicon-oxygen composite negative electrode material comprising SiO, non-LiSiOlithium-containing compound, and LiSiO; said LiSiOis coated on the surface of the non-LiSiOlithium-containing compound; 0≤x≤1.2. The preparation method comprises: mixing a first silicon source with a reducing lithium source and roasting, to obtain a composite material containing a non-LiSiOlithium-containing compound; the composite material containing the non-LiSiOlithium-containing compound is fused with a second silicon source and then subjected to heat treatment to obtain a silicon-oxygen composite negative electrode material. The silicon-oxygen composite anode material provided by the present application is coated with LiSiO, solving the problem in the prior art of a negative electrode material producing strong alkaline or easily soluble by-products in water after pre-lithiation and affecting subsequent processing.

Silicon-oxygen composite negative electrode material and method for preparation thereof and lithium-ion battery

A method for recycling waste lithium iron phosphate is by selective oxidation-reduction, to obtain recycled lithium iron phosphate, and a lithium ion battery. The method includes: primarily sintering waste lithium iron phosphate under a condition where a mild oxidizing gas is introduced; separating a lithium iron phosphate powder material; supplementing lithium and supplementing carbon to the lithium iron phosphate powder material and regulating the composition of the lithium iron phosphate powder material using a lithium source and a carbon source by secondary sintering to obtain recycled lithium iron phosphate, wherein the mild oxidizing gas is water vapor, CO2 gas, or a mixed gas thereof.

Method for recycling waste lithium iron phosphate by selective oxidation-reduction, recycled lithium iron phosphate, and lithium ion battery

The present invention relates to a nano-silicon composite negative electrode material, including graphite matrix and nano-silicon material homogeneously deposited inside the graphite matrix, wherein the nano-silicon composite negative electrode material is prepared by using silicon source to chemical-vapor deposit nano-silicon particles inside hollowed graphite. The nano-silicon composite negative electrode material of the present invention has features of high specific capacity (higher than 1000 mAh/g), high initial charge-discharge efficiency (higher than 93%) and high conductivity. The preparation process of the present invention is easy to operate and control, and has low production cost and is suitable for industrial production.

Nano-silicon composite negative electrode material used for lithium ion battery, process for preparing the same and lithium ion battery

A method for superposing location information on a collage includes: acquiring a selected image and a collage template identifier corresponding to a selected collage template, and acquiring longitude and latitude information corresponding to the selected image; sending the longitude and latitude information and the collage template identifier to a server; and receiving graphic and textual information returned by the server, and superposing the selected image and the graphic and textual information on the selected collage template.

Method for superposing location information on collage, terminal and server

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Guangdong, China

Xueqin He