Kuraray Chemical Co., Ltd.

Kuraray Co., Ltd.

Kureha Corporation

Akimi Ogawa

Kiyoto Otsuka

Hideharu Iwasaki

Naohiro Sonobe

Yasuhiro Tada

Hajime Komatsu

Jiro Masuko

Kenichi Koyakumaru

Junichi Arima

Shushi Nishimura

Mayu Komatsu

Shinya Tago

Yasushi Ebihara

Junsang Cho

Yumika Ninomiya

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 &#x3bc;m, 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 &#x3bc;m at 500&#xb0; C. to 1250&#xb0; 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&#xb0; C. under a non-oxidizing gas atmosphere.

Carbonaceous material for negative electrodes of lithium ion capacitors and method for producing same

Provided is a manufacturing method of carbonaceous material for a negative electrode of non-aqueous electrolyte secondary batteries, wherein the carbonaceous material is obtained from plant-derived char as a source, potassium is sufficiently removed, and an average particle diameter thereof is small; and a carbonaceous material for a negative electrode of non-aqueous electrolyte secondary batteries. The method for manufacturing a carbonaceous material having an average particle diameter of 3 to 30 &#x3bc;m, for a negative electrode of non-aqueous electrolyte secondary batteries includes the steps of: (1) heating plant-derived char having an average particle diameter of 100 to 10000 &#x3bc;m at 500&#xb0; C. to 1250&#xb0; C. under an inert gas atmosphere containing halogen compound to demineralize in a gas-phase, (2) pulverizing a carbon precursor obtained by demineralization in a gas-phase, (3) calcining the pulverized carbon precursor at 1000&#xb0; C. to 1600&#xb0; C. under an non-oxidizing gas atmosphere.

Carbonaceous material for negative electrodes of nonaqueous electrolyte secondary batteries and method for producing same

There is provided a carbon material for polarizable electrodes in which a heterocyclic aromatic compound is adsorbed on an activated carbon, wherein the heterocyclic aromatic compound comprises a five- or six-membered ring having two or more nitrogen atoms as ring-forming atoms; a ratio (N/C) of nitrogen atoms to carbon atoms in the heterocyclic aromatic compound is 0.4 or more; 1 to 35 parts by mass of the heterocyclic aromatic compound is adsorbed based on 100 parts by mass of the activated carbon; and the carbon material for polarizable electrodes has a benzene adsorption capacity of 25 to 75% by mass.

Carbon material for polarizable electrodes and method for producing same

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Bizen, Japan

Akimi Ogawa