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Title:
CARBONACEOUS MATERIAL FOR NEGATIVE ELECTRODES OF LITHIUM ION CAPACITORS AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2014/034859
Kind Code:
A1
Abstract:
The objective of the present invention is to provide: a method for producing a carbonaceous material for negative electrodes of lithium ion capacitors, said carbonaceous material using a plant-derived char as a starting material and having a small average particle diameter, while having potassium element and iron element sufficiently removed therefrom by decalcification; and a carbonaceous material for negative electrodes of lithium ion capacitors. The above-mentioned objective can be achieved by a method for producing a carbonaceous material for negative electrodes of lithium ion capacitors having an average particle diameter of 3-30 μm, which comprises: (1) a gas-phase decalcification step wherein a plant-derived char having an average particle diameter of 100-10,000 μm is subjected to a heat treatment at 500-1,250°C in an inert gas atmosphere containing a halogen compound; (2) a step wherein a carbonaceous precursor obtained by gas-phase decalcification is pulverized; and (3) a step wherein the pulverized carbonaceous precursor is fired at a temperature less than 1,100°C in a non-oxidizing gas atmosphere.

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Inventors:
SONOBE NAOHIRO (JP)
TADA YASUHIRO (JP)
MASUKO JIRO (JP)
KOMATSU HAJIME (JP)
ARIMA JUNICHI (JP)
OGAWA AKIMI (JP)
KOYAKUMARU KENICHI (JP)
OTSUKA KIYOTO (JP)
IWASAKI HIDEHARU (JP)
CHO JUNSANG (JP)
Application Number:
PCT/JP2013/073350
Publication Date:
March 06, 2014
Filing Date:
August 30, 2013
Export Citation:
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Assignee:
KUREHA CORP (JP)
KURARAY CO (JP)
KURARAY CHEMICAL KK (JP)
International Classes:
H01G11/34; H01G11/06; H01M4/587
Domestic Patent References:
WO2005098999A12005-10-20
Foreign References:
JPH1021919A1998-01-23
JPH0283205A1990-03-23
JPS6227316A1987-02-05
JP2000281325A2000-10-10
JP2006303330A2006-11-02
JPH0423504B21992-04-22
JPH0689721A1994-03-29
JP3399015B22003-04-21
JPH09161801A1997-06-20
JP3719790B22005-11-24
JPH07230803A1995-08-29
JP2844302B21999-01-06
JP2007042571A2007-02-15
JP2006128133A2006-05-18
JPH1021919A1998-01-23
JP2000281325A2000-10-10
JP2006303330A2006-11-02
JP2008292272A2008-12-04
Other References:
SHIZUKUNI YADA: "Practical evaluation technology of lithium-ion battery and lithium-ion capacitor", September 2006, THECHNICAL INFORMATION INSTITUTE CO., LTD
See also references of EP 2892066A4
Attorney, Agent or Firm:
MORITA Kenichi et al. (JP)
Ken-ichi Morita (JP)
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