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1. WO2013159470 - THREE-DIMENSIONAL POROUS SILICON-BASED COMPOSITE NEGATIVE ELECTRODE MATERIAL OF LITHIUM ION CELL AND PREPARATION METHOD THEREOF

Publication Number WO/2013/159470
Publication Date 31.10.2013
International Application No. PCT/CN2012/079901
International Filing Date 09.08.2012
IPC
H01M 4/38 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
36Selection of substances as active materials, active masses, active liquids
38of elements or alloys
H01M 4/66 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
64Carriers or collectors
66Selection of materials
CPC
H01M 10/0525
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
052Li-accumulators
0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
H01M 4/134
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
13Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
134Electrodes based on metals, Si or alloys
H01M 4/1395
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
13Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
139Processes of manufacture
1395of electrodes based on metals, Si or alloys
H01M 4/386
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
36Selection of substances as active materials, active masses, active liquids
38of elements or alloys
386Silicon or alloys based on silicon
H01M 4/661
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
64Carriers or collectors
66Selection of materials
661Metal or alloys, e.g. alloy coatings
H01M 4/808
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
64Carriers or collectors
70characterised by shape or form
80Porous plates, e.g. sintered carriers
808Foamed, spongy materials
Applicants
  • 上海杉杉科技有限公司 SHANGHAI SHANSHAN TECH CO. LTD. [CN]/[CN] (AllExceptUS)
  • 刘萍 LIU, Ping [CN]/[CN] (UsOnly)
  • 乔永民 QIAO, Yongmin [CN]/[CN] (UsOnly)
  • 李辉 LI, Hui [CN]/[CN] (UsOnly)
  • 吴敏昌 WU, Minchang [CN]/[CN] (UsOnly)
  • 丁晓阳 DING, Xiaoyang [CN]/[CN] (UsOnly)
  • 谢秋生 XIE, Qiusheng [CN]/[CN] (UsOnly)
  • 郑俊军 ZHENG, Junjun [CN]/[CN] (UsOnly)
Inventors
  • 刘萍 LIU, Ping
  • 乔永民 QIAO, Yongmin
  • 李辉 LI, Hui
  • 吴敏昌 WU, Minchang
  • 丁晓阳 DING, Xiaoyang
  • 谢秋生 XIE, Qiusheng
  • 郑俊军 ZHENG, Junjun
Agents
  • 余姚德盛专利代理事务所(普通合伙) DAN,SAMS & ASSOCIATES
Priority Data
201210126511.926.04.2012CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) THREE-DIMENSIONAL POROUS SILICON-BASED COMPOSITE NEGATIVE ELECTRODE MATERIAL OF LITHIUM ION CELL AND PREPARATION METHOD THEREOF
(FR) MATÉRIAU D'ÉLECTRODE NÉGATIVE COMPOSITE À BASE DE SILICIUM POREUX TRIDIMENSIONNEL POUR PILE À ION LITHIUM, ET PROCÉDÉ DE PRÉPARATION DE CELUI-CI
(ZH) 锂离子电池三维多孔硅基复合负极材料及其制备方法
Abstract
(EN)
Disclosed are a porous silicon-based composite negative electrode material of a lithium ion cell and a preparation method thereof. The present invention adopts a three-dimensional grid structure, so that electrode active materials are evenly dispersed therein and on the surface, and the three-dimensional grid structure has a current collector material having a high-temperature resisting feature and fine conductivity, such as a copper foil mesh, a copper wire mesh, foamed copper, or foamed nickel. Moreover, a dipping method is used to combine slurry containing monatomic silicon or a mixture of monatomic silicon and metal M with the copper foil mesh, copper wire mesh, foamed copper, or foamed nickel, so as to form a three-dimensional porous silicon-based composite negative electrode material through heat treatment (alloying and annealing treatment). In the present invention, through the forming of the three-dimensional porous structure and the silicon metal alloy, and the fine bonding force between the negative electrode material and the three-dimensional porous current collector material, the cell prepared using the porous silicon-based composite negative electrode material has high discharge capacity and initial charge-discharge efficiency, and good cycle performance.
(FR)
L'invention concerne un matériau d'électrode négative composite à base de silicium poreux pour une pile à ions lithium, et un procédé de préparation de celui-ci. La présente invention utilise une structure de grille tridimensionnelle de sorte que les matériaux actifs d'électrode soient dispersés uniformément dans celle-ci et à la surface. La structure de grille tridimensionnelle comprend un matériau collecteur de courant ayant une caractéristique de résistance haute température et une conductivité fine, comme un maillage de feuille de cuivre, un maillage de fil de cuivre, du cuivre expansé ou du nickel expansé. Un procédé de trempage est utilisé pour combiner une bouillie contenant du silicium monoatomique ou un mélange de silicium monoatomique et d'un métal M avec le maillage de feuille de cuivre, le maillage de fil de cuivre, le cuivre expansé ou le nickel expansé de manière à former un matériau d'électrode négative composite à base de silicium poreux par traitement thermique (traitement d'alliage et de recuit). Dans la présente invention, grâce à la formation de la structure poreuse tridimensionnelle et de l'alliage métallique au silicium, et à la force de liaison fine entre le matériau d'électrode négative et le matériau collecteur de courant poreux tridimensionnel, la pile préparée en utilisant un matériau d'électrode négative composite à base de silicium poreux possède une grande capacité de décharge et une grande efficacité de charge-décharge initiale, ainsi que de bonnes performances de cycles.
(ZH)
本发明公开了一种锂离子电池多孔硅基复合负极材料及其制备方法。本发明釆用具有三维网络结构,能使电极活性物质均匀分散其中和表面,并具有一定耐高温特性、导电性良好的集流体材料,如铜箔网或铜丝网或泡沫铜或泡沫镍。并且以浸渍的方法将含有单质硅或单质硅与金属M的混合物的浆料与铜箔网或铜丝网或泡沫铜或泡沫镍结合,然后通过热处理(合金化和退火处理)方式形成三维多孔硅基复合负极材料。本发明中,三维多孔结构、硅金属合金的形成及负极材料与三维多孔集流体材料之间良好的结合力,使得多孔硅基复合负极材料制备得到的电池具有较高的放电比容量、首次充放电效率和良好的循环性能。
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