Title:
リチウム二次電池用負極材料及びその製造方法、並びに該負極材料を用いたリチウム二次電池用の負極活物質層用組成物、リチウム二次電池用負極及びリチウム二次電池
Document Type and Number:
Japanese Patent JP6621994
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a negative electrode material for a lithium secondary battery that have sufficient charging/discharging capacity, coulomb efficiency and cycle characteristic with a simpler method.SOLUTION: Silicon material and carbon nanotube are added to dispersion liquid containing surface active agent and conductive carbon particles which is obtained by dispersing conductive carbon particles in water solution containing surface active agent to obtain dispersion liquid containing conductive carbon particles, silicon material, carbon nanotube and surface active agent. Thereafter, the thus-obtained dispersion liquid is subjected to filtering or solvent-removal to obtain solid composite. Thereafter, the solid composite is subjected to a heat treatment under a reduction atmosphere to obtain a negative material for a secondary battery which contains the conductive carbon particles, the silicon material and the carbon nanotube. The thus-obtained negative material is mixed with graphite to exercise excellent performance.SELECTED DRAWING: None
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Inventors:
Hitoshi Nishino
Yasunori Mori
Yasunori Mori
Application Number:
JP2015028231A
Publication Date:
December 18, 2019
Filing Date:
February 17, 2015
Export Citation:
Assignee:
OSAKA GAS CO.,LTD.
International Classes:
H01M4/38; H01M4/133; H01M4/134; H01M4/1393; H01M4/1395; H01M4/36
Domestic Patent References:
| JP2013522820A | ||||
| JP2013530908A |
Foreign References:
| WO2014192906A1 | ||||
| WO2012140790A1 | ||||
| WO2013066593A1 |
Attorney, Agent or Firm:
Patent Business Corporation Saegusa International Patent Office