US 11,777,109 B2 · Hydrophilic porous carbon electrode and manufacturing method of same

Abstract

A hydrophilic porous carbon electrode which has excellent hydrophilicity, which has high reaction activity when used for a battery, and with which excellent battery characteristics is able to be obtained is provided. A hydrophilic porous carbon electrode is a sheet-form hydrophilic porous carbon electrode in which a carbon fiber is bonded using a resin carbide and has a contact angles θA of water on both surfaces in a thickness direction being 0 to 15° and a contact angle θB of water in a middle portion in the thickness direction being 0 to 15°. The hydrophilic porous carbon electrode is obtained by forming the carbon fiber and a binder fiber into a sheet, impregnating the sheet into a thermosetting resin, subjecting it to heat press processing, and then subjecting it to carbonization at 400 to 3000° C. in an inert atmosphere. The hydrophilic porous carbon electrode is transported and is subjected to a heat treatment while an oxidizing gas flows at 400 to 800° C. in a direction perpendicular to a direction in which the hydrophilic porous carbon electrode is transported to be subjected to hydrophilization.

Claims17

Dependent claims

A redox flow battery, comprising:

a porous carbon electrode which is a porous carbon electrode sheet in which carbon fibers are bonded using a resin carbide;
and
an electrolytic solution,
wherein contact angles θA of water on both surfaces of the porous carbon electrode in a thickness direction are 0 to 15° and a contact angle θB of water in a middle portion of the porous carbon electrode in the thickness direction is 0 to 15°, and
wherein a penetration resistance of the porous carbon electrode is 3.0 to 6.0 mΩ·cm2.

2 more elements

A manufacturing method of the porous carbon electrode which is a porous carbon electrode sheet in which carbon fibers are bonded using a resin carbide,

wherein contact angles θA of water on both surfaces of the porous carbon electrode in a thickness direction are 0 to 15° and a contact angle θB of water in a middle portion of the porous carbon electrode in the thickness direction is 0 to 15°,
wherein a specific surface area of the porous carbon electrode is 1.0 to 1000 m2/g,
the method comprising the following Steps (1) to (5):
Step (1):
a step of forming carbon fibers and a binder fiber into a sheet to obtain a carbon fiber sheet;
Step (2):
a step of impregnating the carbon fiber sheet in a thermosetting resin to obtain a resin-impregnated carbon fiber sheet;
Step (3):
a step of subjecting the resin-impregnated carbon fiber sheet to heat press processing to obtain a resin-cured carbon fiber sheet;
Step (4):
a step of subjecting the resin-cured carbon fiber sheet to carbonization at 400 to 3000° C. in an inert atmosphere to obtain a hydrophilic porous carbon electrode;
and
Step (5):
a step of carrying out a hydrophilization treatment by transporting the porous carbon electrode and subjecting the porous carbon electrode to a heat treatment while causing an oxidizing gas at 400 to 800° C. to flow in a direction perpendicular to a direction in which the porous carbon electrode is transported.

11 more elements

Dependencies are inferred from the claim text.

Hydrophilic porous carbon electrode and manufacturing method of same

Life of this patent

Hydrophilic porous carbon electrode and manufacturing method of same

Life of this patent

Abstract

Claims17