Abstract:
The invention provides a membrane electrode assembly capable of decreasing the reaction resistance thereof at 20°C and attaining a high power, and a polymer electrolyte membrane fuel cell using this. The membrane electrode assembly of the invention comprises an anode catalyst layer and a cathode catalyst layer each made of an electrode substrate, and a polymer electrolyte membrane sandwiched between the anode and the cathode, and satisfying the following expression: -2
Abstract:
A polymer electrolyte that simultaneously attains high proton conductivity a nd low fuel crossover; a member therefrom; and a polymer electrolyte fuel cell of high output and high energy density. In particular, a polymer electrolyte comprising a mixture of proton conductive polymer (A) and polymer (B) different from the proton conductive polymer (A) characterized in that the ratio of antifreeze water quantity in polymer electrolyte, expressed by the following formula (S1), is in the range of 40 to 100% by weight: (Ratio of antifreeze water quantity) = (amt. of antifreeze water)/(amt. of low melting point water + amt. of antifreeze water) .times. 100 (%) (S1).
Abstract:
A polymer electrolyte film which comprises a polymer film having a plurality of through-holes provided in the thickness direction and a proton conductor filling the through-holes, characterized in that a relative standard deviati on (Lvar/LAve), wherein Lave represents an average value of the spaces (L) between the centers of adjacent through-holes and Lvar represents the standa rd deviation of the spaces, takes a value of 0.3 or less; and a method for preparing the polymer electrolyte film which comprises forming the plurality of through-holes in the thickness direction by the use of the photolithograp hy and then filling the resulting through-holes with the proton conductor. The polymer electrolyte film allows the further improvement in the miniturizatio n, performance capability and productivity of a polymer solid electrolyte film, and also, when used in a direct methanol fuel cell (DMFC) using methanol as a fuel, allows the suppression of the permeation of methanol, which leads to t he improvement of the performance capabilities of the cell.
Abstract:
A novel membrane electrode complex capable of reducing a reaction resistance at 20° and attaining a high output, and a solid polymer type fuel cell using it. A novel membrane electrode complex comprising at least an electrode catalyst layer, an anode and a cathode each consisting of an electrode base material, and a polymer solid electrolyte membrane held between the anode and the cathode, wherein the following expression is satisfied when a reaction resistance at 20° is Rr (Ω cm2). -2 ≤ logRr
Abstract:
By referring to data stored in a capacity management information storage unit (33), a capacity distribution control unit (34) distributes additional capacity to a supervision target resource whose current available capacity has become less than a prescribed threshold value by using real volumes in the unit's own site (10) when the real volumes in the unit's own site (10) can deal with the situation, and access another site (remote site (50)) by using an iSCSI protocol, temporarily use real volume (70) in said another site (50), and distributes additional capacity to the supervision target resource when the situation can not be dealt with by the real volumes in the unit' s own site (10). Further, an aggregation unit (35) can aggregate data stored in the temporarily used real volumes (70) in said another site (50) to an available region in the unit's own site (10), and release the temporarily used real volumes (70) in said another site (50).
Abstract:
An electrode using carbon fibers as the carbon material, and a chargeable/dischargeable secondary cell comprising the electrode and a cathode active material of carbon material which can be doped with lithium ions and from which the ions can be removed. The carbon fibers are oriented in one direction or the fibers are mixed with electrically conductive foils or fibers. Thus a large-capacity high-output secondary cell is provided.
Abstract:
PROBLEM TO BE SOLVED: To provide a novel high polymer solid electrolyte capable of reducing methanol crossover and achieving a high output to provide a manufacturing method therefor and a high performance, solid high polymer type fuel cell by use of the electrolyte. SOLUTION: This high polymer solid electrolyte is constituted in such a way that polymer having an anionic group and three-dimensional crosslinked polymer containing a metallic element have an inside penetrating high polymer network structure. COPYRIGHT: (C)2003,JPO
Abstract:
PROBLEM TO BE SOLVED: To curtail deterioration of mechanical intensity and a thickness change due to pressurization when gas permeability is improved in a conductive sheet structured by a fiber conductive material. SOLUTION: A porous structure sheet is mainly structured with a fiber conductive material, and the fiber conductive material is combined with different lengths of fibers.