Title:
CARBON ELECTRODE MATERIAL FOR MANGANESE/TITANIUM-BASED REDOX FLOW BATTERY
Document Type and Number:
WIPO Patent Application WO/2020/184451
Kind Code:
A1
Abstract:
The present invention provides a carbon electrode material used for a negative electrode of a manganese/titanium-based redox flow battery with which it is possible to lower the cell resistance during initial charging/discharging and which has exceptional battery energy efficiency. A carbon electrode material for a manganese/titanium-based redox flow battery, the carbon electrode material being used in a negative electrode of a redox flow battery in which a manganese/titanium-based electrolytic solution is used, wherein the carbon electrode material is characterized in: comprising carbonaceous fibers (A), carbon particles (B) other than graphite particles, and a carbonaceous material (C) that binds the carbonaceous fibers (A) and the carbon particles (B); and satisfying the following requirements. (1) The carbon particles (B) other than graphite particles have a grain diameter of 1 μm or less. (2) Lc(B) is 10 nm or less, where Lc(B) is the size of crystallites in the carbon particles (B) other than graphite particles in the c-axis direction obtained by X-ray diffraction. (3) Lc(C)/Lc(A) is 1.0-5, where Lc(A) and Lc(C) are the sizes of crystallites in the carbonaceous fiber (A) and the carbonaceous material (C), respectively, in the c-axis direction obtained by X-ray diffraction. (4) The mesopore specific surface area derived from the nitrogen gas adsorption amount is 30 m2/g or higher. (5) The number of bonded oxygen atoms on the surface of the carbon electrode material is at least 1% of the total number of carbon atoms on the surface of the carbon electrode material.
Inventors:
MORIMOTO KANA (JP)
KOBAYASHI MASARU (JP)
IWAHARA RYOUHEI (JP)
MATSUMURA TAKAHIRO (JP)
OYA MASAYUKI (JP)
DONG YONGRONG (JP)
KAWAGOE YOSHIYASU (JP)
HASHIMOTO KOICHI (JP)
KOBAYASHI MASARU (JP)
IWAHARA RYOUHEI (JP)
MATSUMURA TAKAHIRO (JP)
OYA MASAYUKI (JP)
DONG YONGRONG (JP)
KAWAGOE YOSHIYASU (JP)
HASHIMOTO KOICHI (JP)
Application Number:
PCT/JP2020/009755
Publication Date:
September 17, 2020
Filing Date:
March 06, 2020
Export Citation:
Assignee:
TOYO BOSEKI (JP)
SUMITOMO ELECTRIC INDUSTRIES (JP)
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
H01M4/88; H01M4/96; H01M8/02; H01M8/18
Domestic Patent References:
| WO2019049756A1 | 2019-03-14 | |||
| WO2019049755A1 | 2019-03-14 |
Foreign References:
| JP2017033758A | 2017-02-09 | |||
| JPS59101776A | 1984-06-12 | |||
| JP2012204135A | 2012-10-22 | |||
| JPS63200467A | 1988-08-18 | |||
| JP2019045664A | 2019-03-22 |
Attorney, Agent or Firm:
USFI PATENT ATTORNEYS INTERNATIONAL OFFICE (JP)
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