摘要:
A polymer electrolyte solution useful in the fabrication of solid polymer electrolyte fuel cell electrodes, characterized by comprising a solvent containing a hydrophilic and high-boiling polar solvent, preferably a mixed solvent mainly comprising the polar solvent and water, having dissolved therein a perfluorocarbon sulfonic acid polymer.
摘要:
The present invention provides an electrode made of carbon nanotubes or carbon nanofibers and a process for preparing the same. The electrode comprising a current collector, sulfur or metal nanoparicles as a binder, and carbon nanotubes or carbon nanofibers is characterized in that the sulfur or metal nanoparticles are bonded, deposited, or fused on the surfaces of the carbon nanotubes or carbon nanofibers so that the carbon nanotubes or carbon nanofibers are bonded to each other and also bonded to the current collector. The electrode prepared according to the present invention exhibits low internal resistance, strong durability and low equivalent series resistance, and therefore the electrode can be effectively used for secondary batteries, supercapacitors or fuel cells.
摘要:
A solid polymer electrolyte-catalyst combined electrode which comprises a solid polymer electrolyte and carbon particles carrying a catalytic material. The solid polymer fuel cell electrode contains carbon particles which are monolayer carbon nano-horn aggregates. The monolayer carbon nano-horns are made up of monolayer carbon nano-tubes of a specific structures each having a conical shape at one end, and are aggregated spherically. A solid polymer fuel cell using the electrode is also provided.
摘要:
An electrode composition comprises a support material that is non-oxidizable at anodic potentials less than about 4 volts, and a catalyst material comprising active electrocatalytic sites. In another embodiment, the electrode can further comprise a proton conductive material disposed on the support and catalyst materials.
摘要:
The present invention is a catalyst for use in a fuel electrode of a polymer solid electrotype fuel cell which is formed by making a carbon powder support platinum and ruthenium thereon, and is characterized in that the loading ratio between platinum and ruthenium is from 1:2.5 to 1:4 (in molar ratio). It is preferable that the loading density of the catalyst is 40 to 70%. Additionally, it is preferable that a carbon powder having a specific surface area of 600 to 1,200 m2/g is used as the carrier supporting the catalyst particles.
摘要:
A fuel cell and a method of operating said fuel cell, which fuel cell comprises an anode having a catalyst adsorbed thereon, said catalyst comprising a hydrogenase which is in direct electronic contact with the anode.
摘要:
Disclosed is a method of making a current collector plate for use in a proton exchange membrane fuel cell. The method includes the steps of: (a) molding the current collector plate by injection, compression or any other molding process from a resin/conductive filler composition; (b) measuring the current collector plate's average thickness; (c) measuring the current collector plate's through-plane resistivity; (d) removing a portion of the current collector plate's surface layer by abrasion; and (e) repeating steps (a) to (d) until a desired plate thickness is removed. The desired plate thickness removed is no more than about 10 micrometers, and preferably about 5 micrometers.
摘要:
This invention provides an electrode comprising a porous conductive substrate as well as an electrode active material and a conductive auxiliary filled in the pores in the substrate. This electrode exhibits improved shape stability (strength), a lower resistivity and better response. This electrode can be used to provide an electrochemical cell capable of quick charge/discharge and exhibiting improved cycle properties.
摘要:
Bipolar plates and end plates for fuel cell stacks. The bipolar plates or end plates may include semi-conductive or conductive bodies, intricate features with close tolerances such as narrow flow channels and conduits with complex flow paths, integral resistive heating elements, internal catalytic reforming capability, integral heat exchanging structure, substantially flat and undistorted contact faces, integral sensors, and internal recuperative heat exchanging capacity. Methods of making bipolar plates and end plates for fuel cell stacks. The methods involve a range of integrated processing techniques that enable a flexible approach to bipolar and end plate design. In addition, the ability to reliably produce features on a small scale allows for the potential miniaturization of bipolar plates and end plates and is therefore ideally suited to further the development of small scale portable fuel cell systems.
摘要:
A membrane electrode assembly for a proton exchange membrane fuel cell that employs an improved catalyst. The catalyst is a mixture of a first catalyst and a second catalyst. The first catalyst is a 50 wt % Pt formed on Vulcan XC72 carbon having a BET surface area of about 250 m2/g. The second catalyst is a 50 wt % Pt formed on Ketjen Black carbon having a BET surface area of about 800 m2/g. The ratio of the first catalyst to the second catalyst is 1:1.