公开(公告)号：US09905375B2

公开(公告)日：2018-02-27

申请号：US14901829

申请日：2014-06-03

Applicant: OTSUKA CHEMICAL CO., LTD.

Inventor： Yoshihisa Tokumaru ,  Taiji Nakagawa ,  Shoji Hiketa ,  Koichi Sorajo

IPC: H01G11/62 ,  H01G9/035 ,  H01G11/64 ,  H01G9/00 ,  H01G11/60

CPC classification number: H01G11/62 ,  H01G9/035 ,  H01G9/155 ,  H01G11/60 ,  H01G11/64 ,  Y02E60/13

Abstract: Provided is a nonaqueous electrolytic solution that provides an electric double layer capacitor having excellent durability. The nonaqueous electrolytic solution is prepared by dissolving a quaternary ammonium salt as an electrolyte in a nonaqueous solvent, and the nonaqueous electrolytic solution comprises a diethylpyrrolidinium salt and/or a 1-ethyl-1,3-dimethylpyrrolidinium salt.

公开(公告)号：US11114695B2

公开(公告)日：2021-09-07

申请号：US16320208

申请日：2017-07-31

Applicant: OTSUKA CHEMICAL CO., LTD.

Inventor： Taiji Nakagawa ,  Yoshihisa Tokumaru ,  Shoji Hiketa

IPC: H01M10/0567 ,  H01G11/62 ,  H01M10/0525 ,  H01M10/052 ,  H01M10/0568

Abstract: To provide an electrolytic solution that suppresses increase in the OH− ion concentration even in the case of electrochemical changes and thereby reduces deterioration or corrosion of resin, rubber, or metal to improve the reliability of an electrochemical device, an electrolyte used in the electrolytic solution, and an electrochemical device comprising the electrolytic solution. The electrolyte, for example, comprises a compound having a cation unit represented by the following formula and an electrolyte (a quaternary ammonium salt or the like). (In the formula, R1, R2, R3, and R4 are the same or different and each represent an alkyl group or an alkoxyalkyl group; R1 and R2 may together form a ring such as a pyrrolidine ring and a piperidine ring; and R3 and R4 may together form a ring such as a pyrrolidine ring and a piperidine ring.)

公开(公告)号：US10593488B2

公开(公告)日：2020-03-17

申请号：US15534234

申请日：2014-12-11

Applicant: OTSUKA CHEMICAL CO., LTD.

Inventor： Yoshihisa Tokumaru ,  Yoshihiro Okada ,  Taiji Nakagawa ,  Shoji Hiketa ,  Koichi Sorajo

IPC: H01G11/62 ,  H01G11/60 ,  C07C211/62 ,  C01B25/455 ,  C01D7/00 ,  C01D13/00 ,  C01G28/00 ,  C01G30/00

Abstract: The present invention provides a nonaqueous electrolytic solution that provides an electric double layer capacitor having excellent durability. The nonaqueous electrolytic solution of the present invention is a nonaqueous electrolytic solution for electric double layer capacitors prepared by dissolving a quaternary ammonium salt as an electrolyte in a nonaqueous solvent, and the nonaqueous electrolytic solution has an alkali metal cation concentration of 0.1 to 30 ppm.