Micro-porous layer and manufacturing method therefor, gas diffusion electrode substrate, and fuel battery
AssigneeToray Industries, Inc.
InventorsMasamichi Utsunomiya, Kentaro Kajiwara, Fumitaka Watanabe, Yasuaki Tanimura
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Abstract
The present invention provides a micro-porous layer which provides a fuel battery having high productivity, high power generation performance, and high durability. The present invention provides a micro-porous layer including fibrous carbohydrate having a fiber diameter of 5 nm-10 μm and an aspect ratio of 10 or more. The carbohydrate has an oxygen/carbon element ratio of 0.02 or more.
Claims12
A micro-porous layer comprising a fibrous carbide having a fiber diameter of 5 nm or more and 10 μm or less and an aspect ratio of 10 or more,
- wherein an oxygen/carbon element ratio of the carbide is 0.02 or more.
A micro-porous layer having a contact angle with a droplet obtained by mixing 2-propanol and water at a ratio of 1:2 of 80° or more, comprising a conductive material having an aspect ratio of less than 20, and comprising substantially no crack.
A method for manufacturing a micro-porous layer, comprising:
- drying ink containing a conductive material having an aspect ratio of less than 20 and a crack suppressing material having an aspect ratio of 2 or more;
- and
- after the drying, performing a heat treatment at a temperature higher than a temperature in the drying step to decompose and remove the crack suppressing material.
Dependencies are inferred from the claim text.