Title:
二次電池用負極材料の製造方法
Document Type and Number:
Japanese Patent JP4385430
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To manufacture a negative electrode material from wastes and to attain large charge/discharge capacities by containing a carbonized material obtained when wood is baked in an inert gas atmosphere or in vacuum. SOLUTION: A current collector made of nickel fibers is mixed into a negative electrode mix mixed with a secondary battery negative electrode material, a binder and a solvent to form a negative electrode 12. The secondary battery negative electrode material is obtained when wood is heat-treated and carbonized. Any wood can be used for the wood to be carbonized, and beech or Japanese cedar is desirous in particular. The wood is preferably heated at a temperature in the range of 300-700 deg.C in the atmosphere of an inert gas such as nitrogen gas or argon gas or in vacuum, then it is heated at the temperature rise rate speed of 1 deg.C/min or more until the temperature reaches the range of 700-1500 deg.C, it is held at this arrival temperature for 5 hr or less, then it is cooled, pulverized and classified.
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Inventors:
Shinichiro Yamada
Ami Miho
Teru Sasaki
Yutaka Oki
Nishi Mio
Ami Miho
Teru Sasaki
Yutaka Oki
Nishi Mio
Application Number:
JP9789799A
Publication Date:
December 16, 2009
Filing Date:
April 05, 1999
Export Citation:
Assignee:
ソニー株式会社
International Classes:
C01B31/02; B09B3/00; C10B53/02; H01M4/583
Domestic Patent References:
| JP6168716A | ||||
| JP8142249A | ||||
| JP9086910A | ||||
| JP3060478A | ||||
| JP10287412A | ||||
| JP11354120A | ||||
| JP11317228A | ||||
| JP8279358A | ||||
| JP9147918A |
Attorney, Agent or Firm:
Akira Koike
Eiichi Tamura
Seiji Iga
Eiichi Tamura
Seiji Iga