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1. (WO2018128099) SECONDARY BATTERY

Pub. No.:    WO/2018/128099    International Application No.:    PCT/JP2017/046214
Publication Date: Fri Jul 13 01:59:59 CEST 2018 International Filing Date: Sat Dec 23 00:59:59 CET 2017
IPC: H01M 10/058
H01M 4/13
H01M 4/134
H01M 4/38
H01M 4/66
H01M 10/052
Applicants: WASEDA UNIVERSITY
学校法人早稲田大学
Inventors: NODA Suguru
野田 優
Title: SECONDARY BATTERY
Abstract:
Provided is a secondary battery that is capable of maintaining the stability of the entire battery at the time of discharging or recharging, and that has a high capacitance density. The secondary battery is characterized by being provided with an electrode structure 10 in which a positive electrode 20, the volume thereof changing along with the expansion or shrinkage at the time of discharging or recharging, and a negative electrode 30, the volume thereof changing inversely with the positive electrode 20, are disposed with a separator 12 interposed therebetween. The secondary battery is characterized in that the positive electrode 20 and the negative electrode 30 each has a volume ratio, which is the value obtained by dividing the volume at the time of expansion by the volume at the time of shrinkage, of 1.1 or higher, that the volume ratio of the positive electrode 20 or the negative electrode 30 is 1.9 or higher, and that the total volume ratio, which is a value obtained by dividing the larger value by the smaller value of the total of the volume of the positive electrode 20 and the volume of the negative electrode 30 at the time of the discharging and the total of the volume of the positive electrode 20 and the volume and the negative electrode 30 at the time of the charging is 1.2 or less.