Title:
非水系電解液二次電池
Document Type and Number:
Japanese Patent JP4051953
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery of large capacity, excellent in shelf life and cycle characteristics. SOLUTION: The nonaqueous electrolyte secondary battery comprises at least a negative electrode and a positive electrode comprising carbonaceous material capable of occulading/releasing lithium, and an electrolyte in which lithium salt is dissolved in a nonaqueous solvent. Related to the negative electrode, a nucle material is a carbon material in which d002 value at X-ray diffraction is 0.335-0.338 nm. A carbonaceous material whose d002 value is larger than the nucle material sticks to a part of or the entire surface of the nucle material. A weight ratio between the nucle material and the carbonaceous material whose d002 value is larger than that is 99/1 to 80/20. The nonaqueous solvent contains at least one kind of vinylene carbonate compound and vinyl ethylene carbonate compound, respectively.
Inventors:
Minoru Furuta
Shuji Sato
Takashi Fujii
Jin Suzuki
Shuji Sato
Takashi Fujii
Jin Suzuki
Application Number:
JP2002038703A
Publication Date:
February 27, 2008
Filing Date:
February 15, 2002
Export Citation:
Assignee:
Mitsubishi Chemical Corporation
International Classes:
H01M10/05; H01M4/02; H01M4/36; H01M4/587; H01M10/0525; H01M10/0567; H01M10/0569
Domestic Patent References:
| JP2001006729A | ||||
| JP2000277148A | ||||
| JP9320597A |
Attorney, Agent or Firm:
Hasegawa Soji