Title:
ELECTROCHEMICAL DEVICE
Document Type and Number:
Japanese Patent JP2022186760
Kind Code:
A
Abstract:
To provide an electrochemical device capable of suppressing deposition of lithium and suppressing reduction in battery capacity even on such a condition that a concentration of a lithium salt in an electrolyte is lower than 1.0 M.SOLUTION: By applying a short-time inverse pulse current a plurality of times in charging of a deteriorated secondary battery, deposition of lithium can be suppressed, and lithium grown in a whisker shape can be dissolved. By applying the inverse pulse current a plurality of times, a lithium ion secondary battery capable of suppressing deterioration caused by repeated charging even in a secondary battery on such a condition that a concentration of a lithium salt in an electrolyte is lower than 1.0 M and lithium is likely to be deposited, can be achieved. That is, a secondary battery capable of suppressing a rapid reduction in battery capacity can be provided without complicating a structure of the battery.SELECTED DRAWING: Figure 1
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Inventors:
Hiroyuki Miyake
Teppei Oguni
Tatsuya Takahashi
Miwa Tetsuya
Aya Uchida
Teppei Oguni
Tatsuya Takahashi
Miwa Tetsuya
Aya Uchida
Application Number:
JP2022162959A
Publication Date:
December 15, 2022
Filing Date:
October 11, 2022
Export Citation:
Assignee:
Semiconductor Energy Laboratory Co., Ltd.
International Classes:
H01M10/44; H02J7/04