Title:
蓄電装置の負極、及び蓄電装置
Document Type and Number:
Japanese Patent JP5639831
Kind Code:
B2
Abstract:
An object is to improve characteristics of a power storage device and achieve a long lifetime. In the case where a lithium nitride is used for a negative electrode active material of a power storage device, a plurality of lithium nitride layers with different lithium concentrations are stacked. For example, in the case where a first lithium nitride layer and a second lithium nitride layer are stacked over a current collector, lithium is contained in the first lithium nitride layer at a lower concentration than lithium contained in the second lithium nitride layer. In this case, a concentration of a transition metal of the first lithium nitride layer is higher than a concentration of the transition metal of the second lithium nitride layer. Note that another alkali metal may be used instead of lithium.
Inventors:
森若 圭恵
高橋 辰也
高橋 辰也
Application Number:
JP2010221462A
Publication Date:
December 10, 2014
Filing Date:
September 30, 2010
Export Citation:
Assignee:
株式会社半導体エネルギー研究所
International Classes:
H01M4/136; C01G53/00; H01G11/50; H01M4/58; H01M10/052; H01M10/0566