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Na0.7Co1-xFexO2(x=0,0.03,0.07,0.10)的制备及其电学性能 被引量：1

Preparation and Electric Properties of Na_(0.7)Co_(1-x)Fe_xO_2(x=0,0.03,0.07,0.10)
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摘要 采用固相反应法制备了Na0.7CoO2和Na0.7Co1-xFexO2(x=0.03,0.07,0.10)。X射线衍射显示Fe部分取代Co掺入了Na0.7CoO2的晶格中,Fe的掺入使晶胞参数c变大。电学性能测试表明,Fe的掺杂使电导率σ随温度的变化趋势发生了改变,并且使电导率降低。Fe的掺杂使Seebeck系数α有一定的提高,但其变化幅度较电导率低。功率因子α2σ的计算结果表明Fe的掺杂引起了材料功率因子的降低。 Na0.7CoO2 and Na0.7Co1-xFexO2（x=0.03,0.07,0.10） were synthesized by solid state reaction method.The X-ray diffractometry（XRD） results showed that Fe could be partially substituted for Co in the Na0.7CoO2 lattice.The lattice parameter c increased with doping Fe.The electric property test showed that the electrical conductivity,σ,obviously decreased for the reason of Fe substitution.The Seebeck coefficient,α,increased with doping Fe,which can be attributed to the increase of the specific heat,Ce.The degree of the increase of Seebeck coefficient was less than that of the decrease of the electrical conductivity,so that,Fe doping led to a decrease in the power factor,α2σ.
作者 胡春飞 吴刚 陈红征 汪茫
机构地区 浙江大学高分子科学与工程学系
出处 《材料科学与工程学报》 CAS CSCD 北大核心 2011年第5期715-719,746,共6页 Journal of Materials Science and Engineering
基金 国家自然科学基金资助项目(50773067)
关键词 Na0.7CoO2 电导率 SEEBECK系数 掺杂 Na0.7CoO2 electrical conductivity Seebeck coefficient doping
分类号 TB34 [一般工业技术—材料科学与工程]
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参考文献26

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共引文献5

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材料科学与工程学报
2011年 第5期

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