Title:
グラフェン粉末、グラフェン粉末の製造方法およびグラフェン粉末を含むリチウム二次電池用電気化学素子
Document Type and Number:
Japanese Patent JP5874736
Kind Code:
B2
Abstract:
Provided are a graphene powder, a production method thereof, and an electrochemical device comprising the same. The graphene powder has an elemental ratio of oxygen atoms to carbon atoms of not less than 0.07 and not more than 0.13 and an elemental ratio of nitrogen atoms to carbon atoms of not more than 0.01. In the production method, the graphene powder is produced by using a dithionous acid salt as a reducing agent. Since the graphene has a low content of nitrogen atoms and a proper amount of oxygen atoms and a proper defect, the graphene is provided with good performance of both dispersibility and conductive property, and is usable as a good conductive additive, such as the one for a lithium ion battery electrode. The production method has the advantages of low cost, high efficiency and low toxicity.
Inventors:
Grandchildren
Kure Sada
Liu Gohashi
Eiichiro Tamaki
Yasuo Kubota
Go Kure
Kure Sada
Liu Gohashi
Eiichiro Tamaki
Yasuo Kubota
Go Kure
Application Number:
JP2013542363A
Publication Date:
March 02, 2016
Filing Date:
December 09, 2011
Export Citation:
Assignee:
TORAY INDUSTRIES,INC.
International Classes:
C01B31/02; H01M4/62
Domestic Patent References:
| JP2010132901A |
Foreign References:
| WO2009123771A2 | ||||
| WO2009061685A1 | ||||
| WO2010089326A1 |
Other References:
Peichao LIAN, et al.,Large reversible capacity of high quality graphene sheets as an anode material for lithium-ion batteries,Electrochimica Acta,2010年 4月30日,Volume 55, Issue 12,,Pages 3909-3914,Available online 13 February 2010
G. SRINIVAS, et al.,Synthesis of graphene-like nanosheets and their hydrogen adsorption capacity,Carbon,2010年 3月,Volume 48, Issue 3,Pages 630-635,Available online 9 October 2009
Dengyu PAN, et al.,Li Storage Properties of Disordered Graphene Nanosheets,Chemistry of Materials,2009年 7月 6日,Volume 21, Issue 14,pp 3136-3142
G. SRINIVAS, et al.,Synthesis of graphene-like nanosheets and their hydrogen adsorption capacity,Carbon,2010年 3月,Volume 48, Issue 3,Pages 630-635,Available online 9 October 2009
Dengyu PAN, et al.,Li Storage Properties of Disordered Graphene Nanosheets,Chemistry of Materials,2009年 7月 6日,Volume 21, Issue 14,pp 3136-3142