Title:
ＳＥＩ膜被覆負極活物質粉末の製造方法
Document Type and Number:
Japanese Patent JP6616984
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing SEI film-coated negative electrode active material powder, which is less in impurity immixture, and superior in the stability of a charge/discharge performance when a power storage device is arranged by use thereof.SOLUTION: A method for manufacturing SEI film-coated negative electrode active material powder comprises: an electrolytic processing unit preparation step for preparing an electrolytic processing unit having a negative electrode current collector, a negative electrode active material powder layer made of negative electrode active material powder and put in contact with the negative electrode current collector, a porous body, and an alkali-metal ion source which are arranged in this order in a thickness direction, and a nonaqueous electrolyte solution, provided that the negative electrode current collector, the negative electrode active material powder layer, the porous body and the alkali-metal ion source are in contact with the nonaqueous electrolyte solution; a first electrolytic process step for electrically connecting the negative electrode current collector and alkali-metal ion source, which are arranged in the electrolytic processing unit, outside the electrolytic processing unit to predope alkali-metal ions to the negative electrode active material powder, and to form an SEI film on the surface of the negative electrode active material powder; and a powder-collecting step for collecting the negative electrode active material powder having gone through the electrolytic process step.SELECTED DRAWING: Figure 2
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Inventors:
Makoto Konno
Takahisa Hirasawa
Takahisa Hirasawa
Application Number:
JP2015174799A
Publication Date:
December 04, 2019
Filing Date:
September 04, 2015
Export Citation:
Assignee:
IBIDEN CO.,LTD.
International Classes:
H01M4/133; H01G11/50; H01G11/60; H01G11/86; H01M4/134; H01M4/36; H01M4/38; H01M4/48; H01M4/587
Domestic Patent References:
| JP2015156328A | ||||
| JP1296565A | ||||
| JP2007299698A | ||||
| JP2014120701A |
Foreign References:
| WO2012099264A1 |
Attorney, Agent or Firm:
Atomi International Patent Office