Title:
LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/202307
Kind Code:
A1
Abstract:
A lithium ion secondary battery which is provided with: a positive electrode that contains, as a positive electrode active material, an active material into which lithium ions are intercalated and deintercalated at a potential of 4.5 V or more with respect to the lithium potential; a negative electrode that contains, as a negative electrode active material, an active material into which lithium ions are intercalated and deintercalated at a potential of 0.4 V or more with respect to the lithium potential; a separator that is interposed between the positive electrode and the negative electrode; and an electrolyte solution that contains a lithium salt and a nonaqueous solvent. This lithium ion secondary battery is configured such that: the nonaqueous solvent contains a phosphoric acid ester that contains fluorine atoms; and the content of the phosphoric acid ester that contains fluorine atoms is more than 5% by volume with respect to the total amount of the nonaqueous solvent.
Inventors:
GOGYO YUMA (JP)
Application Number:
PCT/JP2019/014152
Publication Date:
October 08, 2020
Filing Date:
March 29, 2019
Export Citation:
Assignee:
HITACHI CHEMICAL CO LTD (JP)
International Classes:
H01M10/0569; H01M10/052
Domestic Patent References:
| WO2013129428A1 | 2013-09-06 | |||
| WO2017145497A1 | 2017-08-31 | |||
| WO2016171276A1 | 2016-10-27 |
Foreign References:
| JP2014209436A | 2014-11-06 | |||
| JP2018063916A | 2018-04-19 |
Attorney, Agent or Firm:
TAIYO, NAKAJIMA & KATO (JP)
Download PDF:
Previous Patent: COLD SPRAY DEVICE
Next Patent: STATE CONTROL DEVICE, LEARNING DEVICE, STATE CONTROL METHOD, LEARNING METHOD, AND PROGRAM
Next Patent: STATE CONTROL DEVICE, LEARNING DEVICE, STATE CONTROL METHOD, LEARNING METHOD, AND PROGRAM