摘要:
Disclosed herein is a solid polymer electrolyte wherein protons of cation exchange groups contained in a perfluorinated electrolyte are partially replaced by metal ions. The metal ion is at least one metal ion selected from vanadium (V), manganese (Mn), niobium (Nb), tantalum (Ta), chromium (Cr), molybdenum (Mo), tungsten (W), iron (Fe), ruthenium (Ru), nickel (Ni), palladium (Pd), platinum (Pt), silver (Ag), cerium (Ce), neodymium (Nd), praseodymium (Pr), samarium (Sm), cobalt (Co), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), and erbium (Er) ions. Further disclosed is a solid polymer fuel cell using the solid polymer electrolyte.
摘要:
Disclosed herein is a solid polymer electrolyte wherein protons of cation exchange groups contained in a perfluorinated electrolyte are partially replaced by metal ions. The metal ion is at least one metal ion selected from vanadium (V), manganese (Mn), niobium (Nb), tantalum (Ta), chromium (Cr), molybdenum (Mo), tungsten (W), iron (Fe), ruthenium (Ru), nickel (Ni), palladium (Pd), platinum (Pt), silver (Ag), cerium (Ce), neodymium (Nd), praseodymium (Pr), samarium (Sm), cobalt (Co), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), and erbium (Er) ions. Further disclosed is a solid polymer fuel cell using the solid polymer electrolyte.
摘要:
To improve oxidation resistance of an electrolyte membrane and durability thereof by a low-cost method, thereby improving durability of a polymer electrolyte fuel cell. According to the present invention, in the polymer electrolyte fuel cell having a membrane-electrode assembly including a polymer electrolyte membrane and electrodes bonded to both sides of the polymer electrolyte membrane, phosphate containing at least one metallic element selected from a rare earth element, Ti, Fe, Al and Bi is fixed to at least one of the polymer electrolyte membrane and the electrodes.
摘要:
A membrane electrode assembly according to the invention includes a solid polymer electrolyte membrane and an electrode joined to each of two sides of the solid polymer electrolyte membrane. The solid polymer electrolyte membrane is such that some or all of the protons included in the entire solid polymer electrolyte membrane, a band region, or a non-power generating region are ion exchanged with one or more cations selected from among complex cations, class four alkylammonium cations, and high valence cations. In addition or alternatively, the solid polymer electrolyte membrane includes an organo-metalloxane polymer obtained by impregnating the entire solid polymer electrolyte membrane, the non-power generating region, or the band region with an organo-metalloxane monomer that includes an ammonium cation or a class four ammonium cation at its terminus and then hydrolyzing and polycondensing the organo-metalloxane monomer.
摘要:
A membrane electrode assembly according to the invention includes a solid polymer electrolyte membrane and an electrode joined to each of two sides of the solid polymer electrolyte membrane. The solid polymer electrolyte membrane is such that some or all of the protons included in the entire solid polymer electrolyte membrane, a band region, or a non-power generating region are ion exchanged with one or more cations selected from among complex cations, class four alkylammonium cations, and high valence cations. In addition or alternatively, the solid polymer electrolyte membrane includes an organo-metalloxane polymer obtained by impregnating the entire solid polymer electrolyte membrane, the non-power generating region, or the band region with an organo-metalloxane monomer that includes an ammonium cation or a class four ammonium cation at its terminus and then hydrolyzing and polycondensing the organo-metalloxane monomer.
摘要:
A brazing flux comprises cesium fluoride, aluminum fluoride, and crystalline aluminum hydroxide or aluminum oxide or both which form a crystalline compound having the following composition and containing cesium in the form of a complex salt:x.multidot.CsF-y.multidot.AlF.sub.3 -1/2.multidot.z.multidot.[Al.sub.2 O.sub.3 .multidot.nH.sub.2 O and/or Al.sub.2 O.sub.3 ]where x+y+z=100, x/y.ltoreq.3, 42.ltoreq.x.ltoreq.66, and z.gtoreq.2in terms of mol %. The crystalline compound has a melting point of 440.degree. to 580.degree. C.The brazing flux is non-corrosive and safe to use, and well suited for a brazing aluminum materials with a high magnesium content and also for torch brazing.
摘要翻译:钎焊助熔剂包括氟化铯,氟化铝和结晶氢氧化铝或氧化铝或两者,其形成具有以下组成的结晶化合物,并且含有复合盐形式的铯:xxCsF-yxAlF3-1 / 2xzx [Al2O3·xH2O和/ 或Al 2 O 3],其中x + y + z = 100,x / y = 3,42 / = 2。 结晶化合物的熔点为440〜580℃。钎焊焊剂无腐蚀性,使用安全,非常适用于镁含量高的钎焊铝材料,也适用于焊炬钎焊。
摘要:
A flux for brazing material comprising cesium fluoroaluminate or a mixture thereof with aluminum fluoride, and having an aluminum fluoride/cesium fluoride molar ratio of 67/33 to 26/74.
摘要:
A brazing flux having a composition corresponding to 0 (not inclusive) to 62 mol % of potassium fluoride, 2 to 74 (not inclusive) mol % of cesium fluoride and 26 to 67 mol % of aluminum fluoride, said flux including potassium and cesium as fluoro-aluminum-complexes and not including free cesium fluoride and potassium fluoride, thus having a melting starting point within the range of 440.degree.-580.degree. C.
摘要:
A method of brazing an aluminum material. At least a portion of the material is brought into contact with a coating solution containing cesium and fluorine ions, whereby a chemically coated flux layer composed of cesium fluoroaluminate or a mixture thereof with aluminum fluoride is formed on the surface of the material. Then, the material is heated and joined to another material with a brazing alloy.
摘要:
In a method of brazing aluminum material, the flux is formed on the surface of the aluminum material by a chemical conversion coating step. The aluminum material is brought into contact with a treating solution containing potassium and fluorine ions to cause a chemical reaction between aluminum components and potassium and fluorine ions, thereby forming K.sub.2 AlF.sub.5. The K.sub.2 AlF.sub.5 is present on the surface of the aluminum material as a uniform coating and acts as the flux during brazing. With the treating solution further containing zinc, the flux of K.sub.2 AlF.sub.5 and a pitting corrosion inhibiting layer of metallic zinc are simultaneously formed. The treating solution may further include powdered K.sub.2 AlF.sub.5 or AlF.sub.3 to increase the amount of flux and thus to intensify the action of the flux. The chemical conversion coating may be applied either to the material to be brazed or to the material for brazing.