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首页> 外文期刊>Inorganic materials >New Medium-Temperature Proton Electrolytes Based on CsH_2PO_4 and Silicophosphate Matrices
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New Medium-Temperature Proton Electrolytes Based on CsH_2PO_4 and Silicophosphate Matrices

机译：基于CsH_2PO_4和硅磷酸盐基质的新型中温质子电解质

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摘要

Silicophosphate gels ranging widely in P_2O_5 content and specific surface area have been synthesized by a sol-gel process. We have demonstrated the possibility of producing medium-temperature high-conductivity systems based on silicophosphate matrices and CsH_2PO_4. The thermal, structural, and transport properties of composite proton electrolytes have been investigated. The results indicate that the electrical conductivity of the composites based on matrices with Si: P = 1 : 0.5 increases by up to three and half or four orders of magnitude and that their proton conductivity is ～ 10~(-3) to 3 × 10~(-2) S/cm at temperatures from 90 to 220℃ and a water vapor content of ≃ 0.6-1 mol % in air. The additive suppresses the superionic phase transition of CsH_2PO_4. The increase in conductivity at low contents of the heterogeneous component is due to both CsH_2PO_4 dispersion and the presence of protonated centers on the matrix surface. When the mole fraction of the additive exceeds 0.3, the composites contain CsH_5(PO_4)_2, a compound with a lower thermal stability, which is responsible for their high conductivity in a limited temperature range.
机译：已通过溶胶-凝胶法合成了P_2O_5含量和比表面积广泛的硅磷酸盐凝胶。我们已经证明了生产基于硅磷酸盐基质和CsH_2PO_4的中温高电导系统的可能性。已经研究了复合质子电解质的热，结构和传输性质。结果表明，Si：P = 1：0.5的基体复合材料的电导率提高了三个半或四个数量级，质子电导率为〜10〜（-3）至3×10在90至220℃的温度下约为〜（-2）S / cm，空气中的水蒸气含量约为0.6-1 mol％。添加剂抑制CsH_2PO_4的超离子相变。在低含量的非均质组分中电导率的增加是由于CsH_2PO_4分散和基质表面上质子化中心的存在。当添加剂的摩尔分数超过0.3时，复合材料包含CsH_5（PO_4）_2，这是一种具有较低热稳定性的化合物，这是其在有限温度范围内具有较高电导率的原因。

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  • 来源
    《Inorganic materials》 |2014年第10期|1050-1055|共6页
  • 作者

    V. G. Ponomareva; E. S. Shutova;

  • 作者单位

    Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, ul. Kutateladze 18, Novosibirsk, 630128 Russia,Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090 Russia;

    Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, ul. Kutateladze 18, Novosibirsk, 630128 Russia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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