Title:
NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP3604114
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve the cycle characteristics of a nonaqueous electrolyte secondary battery by preventing the oxidation and deterioration of a nonaqueous electrolyte layer.
SOLUTION: In a nonaqueous electrolyte secondary battery composed of a positive electrode, a nonaqueous electrolyte layer, and a negative electrode capable of absorbing and releasing lithium, an antioxidant are added into an nonaqueous electrolyte layer. For an example, an electrolyte is obtained by adding 0.1 weight portion of tetrakis (methylene-3-(3, 5-di-t-butyl-4- hydroxyphenol)-propyonate) methane as the antioxidant to 100 weight portions of the nonaqueous solvent solution of LiBF4 (the nonaqueous electrolyte salt). Thereby, a battery cycle characteristic is improved.
More Like This:
| JP4248444 | Electrolytes for lithium batteries and lithium batteries containing them |
| JP2006216450 | BATTERY |
| JP3563646 | ELECTROCHEMICAL DEVICE |
Inventors:
Masahiro Taniuchi
Tomohiro Inoue
Yoshitaka Hayashi
Tomohiro Inoue
Yoshitaka Hayashi
Application Number:
JP25001697A
Publication Date:
December 22, 2004
Filing Date:
August 29, 1997
Export Citation:
Assignee:
株式会社リコー
International Classes:
H01M10/05; H01M10/052; H01M10/0565; H01M10/0567; H01M10/0568; (IPC1-7): H01M10/40
Domestic Patent References:
| JP58087777A | ||||
| JP62237680A | ||||
| JP5029019A | ||||
| JP6333598A | ||||
| JP7078635A | ||||
| JP8236155A | ||||
| JP10154531A | ||||
| JP10247517A | ||||
| JP11040194A | ||||
| JP9097615A | ||||
| JP9073893A | ||||
| JP8222235A |
Attorney, Agent or Firm:
Chieko Tateno