公开(公告)号：US20210066707A1

公开(公告)日：2021-03-04

申请号：US17017862

申请日：2020-09-11

申请人： MITSUBISHI CHEMICAL CORPORATION

发明人： Hidekazu MIYAGI ,  Ryoichi Kato ,  Masakazu Yokomizo ,  Hiroyuki Uono ,  Hitoshi Matsumoto ,  Tomohiro Satou ,  Minoru Kotato ,  Takayuki Nakajima ,  Hitoshi Suzuki ,  Hiroyuki Oshima

IPC分类号： H01M4/131 ,  H01M4/587 ,  H01M4/133 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569 ,  B60L50/64 ,  H01M10/052 ,  H01M10/613 ,  H01M10/625 ,  H01M2/02 ,  H01M2/08 ,  H01M2/16 ,  H01M4/505 ,  H01M4/583 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/485 ,  H01M4/525

摘要： A lithium secondary battery comprising: a positive electrode and a negative electrode which each has a specific composition and specific properties; and a nonaqueous electrolyte which contains a cyclic siloxane compound represented by general formula (1), fluorosilane compound represented by general formula (2), compound represented by general formula (3), compound having an S—F bond in the molecule, nitric acid salt, nitrous acid salt, monofluorophosphoric acid salt, difluorophosphoric acid salt, acetic acid salt, or propionic acid salt in an amount of 10 ppm or more of the whole nonaqueous electrolyte. This lithium secondary battery has a high capacity, long life, and high output. [In general formula (1), R1 and R2 are an organic group having 1-12 carbon atoms and n is an integer of 3-10. In general formula (2), R3 to R5 are an organic group having 1-12 carbon atoms; x is an integer of 1-3; and p, q, and r each are an integer of 0-3, provided that 1≤p+q+r≤3. In general formula (3), R6 to R8 are an organic group having 1-12 carbon atoms and symbol A is a group constituted of H, C, N, O, F, S, Si, and/or P.]