Title:
LITHIUM SECONDARY BATTERY, POWER STORAGE DEVICE INCLUDING LITHIUM SECONDARY BATTERY, AND METHOD FOR MANUFACTURING LITHIUM SECONDARY BATTERY
Document Type and Number:
Japanese Patent JP2016131123
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a lithium secondary battery superior in output characteristic.SOLUTION: A lithium secondary battery 1 comprises a positive electrode 10, a negative electrode 12, and an electrolyte. The positive electrode 10 is configured so as to form a positive electrode mixture layer including a positive electrode active material, a binder and a conducting agent on a positive electrode current collector. The negative electrode 12 is configured so as to form a negative electrode mixture layer including a negative electrode active material, a binder and a conducting agent on a negative electrode current collector. The positive electrode mixture layer is 40 μm or less in thickness, and 40-55% in porosity. The positive electrode active material is 1-5 μm in average particle diameter. In the positive electrode mixture layer, the volume of the conducting agent is 10-40% of that of the binder. The conducting agents contained both in the positive electrode mixture layer and the negative electrode mixture layer are a fibrous conducting agent or a mixture of the fibrous conducting agent and a particulate conducting agent. The fibrous conducting agent is 20 or more in aspect ratio.SELECTED DRAWING: Figure 1
Inventors:
NISHIMURA ETSUKO
OKUMURA TAKEFUMI
TAKAMORI YOSHIYUKI
NOIE AKIHIKO
ARAKI CHIEKO
NAOE KAZUAKI
AMAGASAKI SHIMPEI
OKUMURA TAKEFUMI
TAKAMORI YOSHIYUKI
NOIE AKIHIKO
ARAKI CHIEKO
NAOE KAZUAKI
AMAGASAKI SHIMPEI
Application Number:
JP2015005311A
Publication Date:
July 21, 2016
Filing Date:
January 14, 2015
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H01M10/052; H01M4/13; H01M4/62; H01M10/058
Domestic Patent References:
| JP2007103040A | 2007-04-19 | |||
| JPH11329409A | 1999-11-30 | |||
| JP2007048692A | 2007-02-22 | |||
| JP2007042620A | 2007-02-15 | |||
| JP2006066243A | 2006-03-09 |
Foreign References:
| WO2012063370A1 | 2012-05-18 |
Attorney, Agent or Firm:
Fuyuki Nagai