摘要:
Processes, techniques, and compositions used to fabricate high performance solid acid fuel cell membrane electrode assemblies are disclosed. The techniques include preparing the solid acid electrolyte material, depositing the electrolyte membrane, depositing the electrocatalyst layer, preparing the electrodes, fabricating the gas seals, and constructing the membrane electrode assembly.
摘要:
Direct alcohol fuel cells using solid acid electrolytes and internal reforming catalysts are disclosed. The fuel cell generally comprises an anode, a cathode, a solid acid electrolyte and an internal reforming catalyst. The internal reforming catalyst may comprise any suitable reformer and is positioned adjacent the anode. In this configuration the heat generated by the exothermic fuel cell catalyst reactions and ohmic heating of the fuel cell electrolyte drives the endothermic fuel reforming reaction, reforming the alcohol fuel into hydrogen. Any alcohol fuel may be used, e.g. methanol or ethanol. The fuel cells according to this invention show increased power density and cell voltage relative to direct alcohol fuel cells not using an internal reformer.
摘要:
Processes, techniques, and compositions used to fabricate high performance solid acid fuel cell membrane electrode assemblies are disclosed. The techniques include preparing the solid acid electrolyte material, depositing the electrolyte membrane, depositing the electrocatalyst layer, preparing the electrodes, fabricating the gas seals, and constructing the membrane electrode assembly.
摘要:
The present invention relates to a power generator and method for forming the same. More specifically, the present invention comprises a chamber containing a solid oxide fuel cell (SOFC), with a spiral-wound counter-current heat exchanger encompassing the chamber. The spiral-wound counter-current heat exchanger includes a first inlet and an outlet, where both the first inlet and the outlet are connected with the chamber such that reactants introduced into the power generator flow into the first inlet and past the SOFC, where the reactants react to produce energy and reaction products. The reaction products thereafter transfer heat to the reactants and subsequently exit through the outlet. A reactor can be positioned downstream of the SOFC for converting reactants not reacted by the SOFC.
摘要:
A thermoelectric having self-assembled structures, where the structures may be lamellae or dendrites. For some embodiments, the self-assembled structures are obtained by melting a mixture of Pb, Te, and Sb; cooling; and then annealing. During this process, a metastable alloy is formed, which decomposes into lamellae structures of PbTe and Sb2Te3. Other embodiments are described and claimed.
摘要翻译:具有自组装结构的热电体,其中结构可以是薄片或树枝状结构。 对于一些实施例,通过熔化Pb,Te和Sb的混合物获得自组装结构; 冷却; 然后退火。 在该过程中,形成亚稳态合金,其分解成PbTe和Sb 2 Te 3 3的薄片结构。 描述和要求保护其他实施例。
摘要:
Solid acid/surface-hydrogen-containing secondary component electrolyte composites, methods of synthesizing such materials, electrochemical device incorporating such materials, and uses of such materials in fuel cells, membrane reactors and hydrogen separations are provided. The stable electrolyte composite material comprises a solid acid component capable of undergoing rotational disorder of oxyanion groups and capable of extended operation at a wide temperature range and a secondary compound with surface hydrogen atoms, which when intimately mixed, results in a composite material with improved conductivity, mechanical and thermal properties, when compared to pure solid acid compound.
摘要:
The present invention relates to a power generator and method for forming the same. More specifically, the present invention comprises a chamber containing a solid oxide fuel cell (SOFC), with a spiral-wound counter-current heat exchanger encompassing the chamber. The spiral-wound counter-current heat exchanger includes a first inlet and an outlet, where both the first inlet and the outlet are connected with the chamber such that reactants introduced into the power generator flow into the first inlet and past the SOFC, where the reactants react to produce energy and reaction products. The reaction products thereafter transfer heat to the reactants and subsequently exit through the outlet. A reactor can be positioned downstream of the SOFC for converting reactants not reacted by the SOFC.
摘要:
Improved solid acid electrolyte materials, methods of synthesizing such materials, and electrochemical devices incorporating such materials are provided. The stable electrolyte material comprises a solid acid in a eulytine structure capable of undergoing rotational disorder of oxyanion groups and capable of extended operation at elevated temperatures, that is, solid acids having hydrogen bonded anion groups; a superprotonic disordered phase; and capable of operating at temperatures of ˜100° C. and higher.
摘要:
A solid acid material is used as a proton conducting membrane in an electrochemical device. The solid acid material can be one of a plurality of different kinds of materials. A binder can be added, and that binder can be either a nonconducting or a conducting binder. Nonconducting binders can be, for example, a polymer or a glass. A conducting binder enables the device to be both proton conducting and electron conducting.
摘要:
Improved cathode active materials for reduced temperature operation in single and dual chamber solid oxide fuel cells are provided. The cathode active materials comprise perovskites of the general form ABO3, where A is a cation with approximately a +2 charge, and B is a cation with approximately a +4 charge. These perovskite cathode materials exhibit substantially enhanced power generation at operation temperatures less than or equal to 600° C.