Sumitomo Electric Industries, Limited

Toyobo Co., Ltd.

Ryouhei Iwahara

Masayuki Oya

Yongrong Dong

Kenichi Itou

Yoshiyasu Kawagoe

Toshikatsu Enjoji

Masaru Kobayashi

Masako Tatsuta

Takahiro Matsumura

A carbon electrode material is disclosed for a redox flow battery that particularly, even when using an Mn&#x2014;Ti type electrolyte, while stabilizing Mn ions and suppressing a rise in cell resistance during initial charge and discharge, has excellent oxidation resistance. The electrode material includes a carbonaceous fiber, and a carbonaceous material for binding the carbonaceous fiber, and satisfies the requirements: (1) when the size of a crystallite in a c axis direction found by X-ray diffraction in the carbonaceous material (B) is Lc(B), Lc(B) is 10 nm or greater; (2) when the size of the crystallite in the c axis direction found by X-ray diffraction in the carbonaceous fiber (A) is Lc(A), Lc(B)/Lc(A) is 1.0 or greater; and (3) the number of bonded oxygen atoms of the carbon electrode material surface is 1.0% or greater than the total number of carbon atoms of the carbon electrode material surface.

Carbon electrode material for redox flow battery, and manufacturing method thereof

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Otsu, Japan

Ryouhei Iwahara