Title:
NEGATIVE ELECTRODE FOR LITHIUM ION BATTERIES, AND LITHIUM ION BATTERY
Document Type and Number:
WIPO Patent Application WO/2018/179802
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a negative electrode for lithium ion batteries, which enables the achievement of a laminated lithium ion battery that has good aging efficiency, while being suppressed in battery bulging. A negative electrode (100) for lithium ion batteries according to the present invention is provided with a collector layer (101) and a negative electrode active material layer (103) that is provided on at least one surface of the collector layer (101) and contains, as a negative electrode active material, a surface-coated graphite material, at least a part of the surface of which is coated with an amorphous carbon. The water vapor saturated adsorption of the negative electrode active material layer (103) as determined by a method described below is from 0.03 cm3 (STP)/g to 0.25 cm3 (STP)/g (inclusive).
(Method) The negative electrode active material layer (103) (3.0 g) is dried for 2 hours in a nitrogen atmosphere at 220°C. Subsequently, the dried negative electrode active material layer (103) is caused to adsorb water vapor at 25°C by means of a constant volume method, thereby calculating the water vapor saturated adsorption of the negative electrode active material layer (103).
Inventors:
TAKEDA KOUZOU (JP)
Application Number:
PCT/JP2018/003128
Publication Date:
October 04, 2018
Filing Date:
January 31, 2018
Export Citation:
Assignee:
NEC ENERGY DEVICES LTD (JP)
International Classes:
H01M4/133; H01M2/02; H01M4/36; H01M4/587; H01M4/62
Domestic Patent References:
| WO2013183530A1 | 2013-12-12 | |||
| WO2014141552A1 | 2014-09-18 | |||
| WO2016104315A1 | 2016-06-30 |
Foreign References:
| JPH05290883A | 1993-11-05 |
Attorney, Agent or Firm:
HAYAMI Shinji (JP)
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