US 12,362,367 B2
Electrode, battery cell, cell stack, and redox flow battery system
Kousuke Shiraki, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/764,628
Filed by SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
PCT Filed Oct. 9, 2019, PCT No. PCT/JP2019/039925
§ 371(c)(1), (2) Date Mar. 29, 2022,
PCT Pub. No. WO2021/070311, PCT Pub. Date Apr. 15, 2021.
Prior Publication US 2022/0336823 A1, Oct. 20, 2022
Int. Cl. H01M 4/96 (2006.01); H01M 8/18 (2006.01)
CPC H01M 4/96 (2013.01) [H01M 8/188 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An electrode comprising a carbon fiber, wherein
the carbon fiber has a first region including a surface of the carbon fiber,
when a cross section of the carbon fiber is analyzed by electron energy loss spectroscopy, the first region has peaks both around 285 eV and around 530 eV,
the first region is provided up to 10% of a diameter of the carbon fiber from the surface toward a center,
the size of the peak around 285 eV against the intensity before and after 285 eV is larger at 200 nm than at 20 nm, and
the size of the peak around 530 eV against the intensity before and after 530 eV is larger at 20 nm than at 200 nm.