Title:
蓄電素子用負極及び蓄電素子
Document Type and Number:
Japanese Patent JP6614439
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for improving the permeability of an electrolytic solution in the case of a negative electrode mixture layer having a small porosity in a negative electrode for a power storage device.SOLUTION: A negative electrode for a power storage device comprises a negative electrode mixture layer including aggregates of negative electrode active material (aggregated active material) and flakes of crystalline graphite. The percentage of the flakes of crystalline graphite is 20-40 mass% to a total mass of the active material aggregates and the crystalline graphite flakes. The negative electrode mixture layer is 20% or less in porosity. It is preferable that the aggregated active material includes at least one kind of substance selected from a graphite material, a carbon material, silicon, a silicon alloy and a silicon compound, and the porosity of a negative electrode mixture phase is 15% or less.SELECTED DRAWING: Figure 1
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Inventors:
Aya Kei
Shigeki Yamate
Shigeki Yamate
Application Number:
JP2015193419A
Publication Date:
December 04, 2019
Filing Date:
September 30, 2015
Export Citation:
Assignee:
Gs Yuasa Co., Ltd.
International Classes:
H01M4/133; H01G11/24; H01G11/42; H01M4/134; H01M4/36; H01M4/38; H01M4/587; H01M10/0566
Domestic Patent References:
| JP2008311209A | ||||
| JP2000138061A |
Foreign References:
| WO2012127548A1 |
Attorney, Agent or Firm:
Satoru Matsumoto
Junko Yoshimizu
Junko Yoshimizu