Title:
SILICON/CARBON COMPOSITE ANODES FOR LITHIUM-ION BATTERIES WITH SUSTAINED HIGH CAPACITY PER UNIT AREA
Document Type and Number:
Japanese Patent JP2015176867
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide anode materials with good capacity per unit area that could be conserved over at least 30 continuous charging and discharging cycles, preferably at least 50 continuous charging and discharging cycles.SOLUTION: A method for producing a silicon carbon composite electroactive anode material (AM) capable of being alloyed comprises (i) mixing micro sized silicon powder with micro sized polymer powder to form a silicon-polymer-mixture, (ii) heating the silicon-polymer mixture in inert gas to a pyrolysis temperature and keeping it there for a time sufficiently long to pyrolyze the polymer and to form a pyrolyzed polymer coated silicon, and (iii) milling the pyrolyzed polymer coated silicon in inert gas to form the silicon carbon composite electroactive anode material (AM). Such AM can be formed into electrodes by mixing AM with e.g. polymer binder, electrically conductive additives and solvent, coating therewith a current collector and drying the coating.
Inventors:
JOSE-ANTONIO GONZALEZ
Application Number:
JP2015046770A
Publication Date:
October 05, 2015
Filing Date:
March 10, 2015
Export Citation:
Assignee:
BELENOS CLEAN POWER HOLDING AG
International Classes:
H01M4/38; H01M4/133; H01M4/134; H01M4/1393; H01M4/1395; H01M4/36; H01M4/587; H01M4/62
Domestic Patent References:
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| JP2013541806A | 2013-11-14 | |||
| JP2014183043A | 2014-09-29 | |||
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Foreign References:
| WO2008081883A1 | 2008-07-10 | |||
| WO2015097990A1 | 2015-07-02 | |||
| US20090208844A1 | 2009-08-20 |
Attorney, Agent or Firm:
Masaki Yamakawa
Shigeki Yamakawa
Shigeki Yamakawa