公开(公告)号：US20170294676A1

公开(公告)日：2017-10-12

申请号：US15518104

申请日：2015-09-03

Applicant: TOKYO UNIVERSITY OF SCIENCE FOUNDATION

Inventor： Shinichi KOMABA ,  Kei KUBOTA ,  Mouad DAHBI ,  Tetsuya HASEGAWA

IPC: H01M10/054 ,  H01G11/68 ,  H01M4/62 ,  H01G11/30 ,  H01M4/587 ,  H01M4/66

Abstract: Provided are: a potassium ion secondary battery which is not susceptible to deterioration of charge/discharge capacity even if charging and discharging are repeated, and which has a long service life as a secondary battery; a potassium ion capacitor; a negative electrode for the potassium ion secondary battery; and a negative electrode for the potassium ion capacitor. A negative electrode for potassium ion secondary batteries and a negative electrode for potassium ion capacitors, each of which contains a carbon material that is capable of absorbing and desorbing potassium and a binder that contains a polycarboxylic acid and/or a salt thereof. A potassium ion secondary battery which is provided with the negative electrode or the capacitor. A binder for negative electrodes of potassium ion secondary batteries or negative electrodes of potassium ion capacitors, which contains a polycarboxylic acid and/or a salt thereof.