The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 29, 2016
Filed:
Aug. 30, 2013
Kureha Corporation, Tokyo, JP;
Kuraray Co., Ltd., Kurashiki-shi, Okayama, JP;
Kuraray Chemical Co., Ltd., Bizen-shi, Okayama, JP;
Naohiro Sonobe, Tokyo, JP;
Yasuhiro Tada, Tokyo, JP;
Jiro Masuko, Tokyo, JP;
Hajime Komatsu, Tokyo, JP;
Junichi Arima, Bizen, JP;
Akimi Ogawa, Bizen, JP;
Kenichi Koyakumaru, Bizen, JP;
Kiyoto Otsuka, Bizen, JP;
Hideharu Iwasaki, Kurashiki, JP;
Junsang Cho, Kurashiki, JP;
KUREHA CORPORATION, Tokyo, JP;
KURARAY CO., LTD., Kurashiki-Shi, Okayama, JP;
KURARAY CHEMICAL CO., LTD., Bizen-Shi, Okayama, JP;
Abstract
The object of the present invention is to provide a manufacturing method of carbonaceous material for a negative electrode of lithium ion capacitors, wherein the carbonaceous material is obtained from plant-derived char as a source, potassium and iron are sufficiently removed, and an average particle diameter thereof is small; and a carbonaceous material for a negative electrode of lithium ion capacitors. The object can be solved by a method for manufacturing a carbonaceous material having an average diameter of 3 to 30 μm, for a negative electrode of lithium ion capacitors comprising the steps of: (1) heating plant-derived char having an average particle diameter of 100 to 10000 μm at 500° C. to 1250° C. under an inert gas atmosphere containing a halogen compound to demineralize in a gas-phase, (2) pulverizing a carbon precursor obtained by the demineralization in a gas-phase, (3) calcining the pulverized carbon precursor at less than 1100° C. under a non-oxidizing gas atmosphere.