Title:
NEGATIVE ELECTRODE ACTIVE MATERIAL, SECONDARY BATTERY, NEGATIVE ELECTRODE MANUFACTURING METHOD, AND NEGATIVE ELECTRODE PROCESSING DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/103113
Kind Code:
A1
Abstract:
While materials containing silicon draw attention as high capacity negative electrode active materials, such materials have the drawback of having large irreversible capacities at initial charge and discharge. In the present invention, particles that are a mixture of silicon, lithium metasilicate, and lithium oxide serve as a negative electrode active material. As the negative electrode active material already contains lithium metasilicate and lithium oxide in the particles thereof, no more compounds (lithium orthosilicate and lithium metasilicate) containing lithium and oxygen, which are a source of the irreversible capacity at the initial charge and discharge, are generated. Therefore, a negative electrode active material with a small irreversible capacity can be provided.
Inventors:
INOUE NOBUHIRO (JP)
MIYAKE HIROYUKI
SATO YUIKA
MIYAKE HIROYUKI
SATO YUIKA
Application Number:
PCT/IB2015/059649
Publication Date:
June 30, 2016
Filing Date:
December 16, 2015
Export Citation:
Assignee:
SEMICONDUCTOR ENERGY LAB (JP)
International Classes:
H01M4/38; H01M4/139; H01M4/1391; H01M4/1395; H01M4/36; H01M4/48; H01M4/485; H01M4/505; H01M4/525; H01M10/052
Domestic Patent References:
| WO2014077113A1 | 2014-05-22 | |||
| WO2015063979A1 | 2015-05-07 |
Foreign References:
| JPH0322366A | 1991-01-30 | |||
| JP2014082118A | 2014-05-08 | |||
| JP2013251097A | 2013-12-12 |
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