Basic polymer electrolyte fuel cell
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsHiroyuki Oyanagi, Minako Onodera
Life of this patent
Estimating the term…
Abstract
A fuel cell has a unit cell whose output is increased. A unit cell of a fuel cell includes a cathode electrode having a gas diffusion layer and an electrode catalyst layer. The electrode catalyst layer is made of carbon black carrying a Pt—Mn-based alloy such as a Pt—Mn alloy on its particle surface. For operating the fuel cell which includes the cathode electrode, it is preferable to make the pressure of an oxygen-containing gas supplied to the cathode electrode higher than the pressure of an hydrogen-containing gas supplied to an anode electrode to make the pressure at the cathode electrode higher than the pressure at the anode electrode.
Claims12
A fuel cell comprising:
- a unit cell comprising an electrolyte electrode assembly having an anode electrode, a cathode electrode, and an electrolyte of a basic polymer impregnated with an acidic electrolytic solution serving as a hydrogen ion conductor, and a pair of separators sandwiching said electrolyte electrode assembly therebetween;
- and
- said anode electrode and said cathode electrode having respective gas diffusion layers and respective electrode catalyst layers;
- said electrode catalyst layer of at least said cathode electrode consisting of carrier particles directly coated onto the gas diffusion layer through a screen printing process, the carrier particles containing a Pt—Mn-based alloy having constituent elements of Pt and Mn.
A fuel cell comprising:
- a unit cell comprising an electrolyte electrode assembly having an anode electrode, a cathode electrode, and an electrolyte of a basic polymer impregnated with an acidic electrolytic solution serving as a hydrogen ion conductor, and a pair of separators sandwiching said electrolyte electrode assembly therebetween;
- and
- said anode electrode and said cathode electrode having respective gas diffusion layers and respective electrode catalyst layers;
- said electrode catalyst layer of said cathode electrode and said electrode catalyst layer of said anode electrode containing a Pt—Mn-based alloy having constituent elements of Pt and Mn, wherein an amount of Pt—Mn alloy in the cathode electrode is greater than an amount of Pt—Mn alloy in the anode electrode.
Dependencies are inferred from the claim text.