公开(公告)号：EP4386925A1

公开(公告)日：2024-06-19

申请号：EP23853728.6

申请日：2023-10-20

申请人： The School Corporation Kansai University ,  DAIKIN INDUSTRIES, LTD.

发明人： ISHIKAWA, Masashi ,  OKUDA, Daisuke ,  MURATA, Chihiro ,  HIDAKA, Tomoya ,  YAMAZAKI, Shigeaki ,  MARI, Daichi

IPC分类号： H01M10/0569 ,  H01M4/38 ,  H01M4/58 ,  H01M4/60 ,  H01M10/052

摘要： Provided is an electrolyte solution capable of providing a lithium-sulfur secondary battery that has excellent cycle characteristics and that is less likely to generate gas. The electrolyte solution is intended to be used in a lithium-sulfur secondary battery that includes: a positive electrode containing a sulfur-containing electrode active material that includes at least one selected from the group consisting of simple sulfur, lithium polysulfide (Li2Sn: 1

公开(公告)号：EP4383389A1

公开(公告)日：2024-06-12

申请号：EP22895726.2

申请日：2022-11-21

申请人： The School Corporation Kansai University ,  GS Yuasa International Ltd.

发明人： HAKARI, Takashi ,  ISHIKAWA, Masashi ,  MURATA, Chihiro ,  OKUDA, Daisuke ,  OZAKI, Shinji ,  HARADA, Ryo ,  KONDO, Atsuro ,  INAMASU, Tokuo

IPC分类号： H01M10/052 ,  H01G11/32 ,  H01G11/58 ,  H01M4/13 ,  H01M4/36 ,  H01M10/0569 ,  H01M10/058

CPC分类号： Y02E60/10 ,  H01M4/13 ,  H01G11/32 ,  H01M10/052 ,  H01M4/36 ,  H01M10/0569 ,  H01G11/58 ,  H01M10/058

摘要： A nonaqueous electrolyte energy storage device according to one aspect of the present invention includes: a positive electrode containing a composite of porous carbon and sulfur; and a nonaqueous electrolyte containing a nonaqueous solvent containing an unsaturated cyclic carbonate and a lithium salt, in which a cumulative 70% pore size of the porous carbon is 2.0 nm or more and 7.0 nm or less, a content of the unsaturated cyclic carbonate in the nonaqueous solvent is 10 vol% or more, and a positive electrode potential at an end-of-discharge voltage in normal use is 1.0 V vs. Li/Li+ or less.