GAS DIFFUSION ELECTRODE BASE, LAMINATE AND FUEL CELL

• Main Authors: TANIMURA, Yasuaki, UTSUNOMIYA, Masamichi, KAMAE, Toshiya, URAI, Junichi
• Format: Patent
• Language: English; French; German
• Published: 06.02.2019
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TRANSPORTING

Problem: A gas diffusion electrode substrate satisfying both short circuit resistance and flooding resistance and having high durability and good power generation performance is provided. Solution: A gas diffusion electrode substrate having: an electrically conductive porous substrate and a microporous layer 1 on one side of the electrically conductive porous substrate; in which the microporous layer 1 includes a dense portion A and a dense portion B; in which the dense portion A is a region containing a fluorine resin and a carbonaceous powder having a primary particle size of 20 nm to 39 nm; in which the dense portion A has a thickness of 30% to 100% with respect to the thickness of the microporous layer 1 as 100% and a width of 10 µm to 200 µm; and in which the dense portion B is a region containing a fluorine resin and a carbonaceous powder having a primary particle size of 40 nm to 70 nm.