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Synthesis of Lithium Garnet Oxides of the Compositions Series Li7-xLa3Zr2-xTaxO12

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【作者】 王治安； MO Jun； WU Yuping； 叶红齐； WU Xiongwei；

【Author】 WANG Zhian;MO Jun;WU Yuping;YE Hongqi;WU Xiongwei;Department of Chemistry and Chemical Engineering, Central South University;College of Science,National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanica, College of Agronomy, Hunan Agricultural University;New Energy and Materials Laboratory (NEML), Department of Chemistry & Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University;College of Energy, Nanjing University of Technology;

【机构】 Department of Chemistry and Chemical Engineering, Central South University； College of Science,National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanica, College of Agronomy, Hunan Agricultural University； New Energy and Materials Laboratory (NEML), Department of Chemistry & Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University； College of Energy, Nanjing University of Technology；

【摘要】 In order to obtain a safe,reliable,long-lived battery system without use of flammable,volatile,and relatively unstable organic liquid-based electrolytes,lithium garnet oxides with formulas Li7-xLa3Zr2-xTaxO12（x=0.2-1）were synthesized by the solid state reaction method.Single cubic phases were observed in the composition x range between 0.2 and 1.The lattice parameters decreased with the addition of Ta due to the smaller ionic radius of Ta5+compared with that of Zr4+,following the Vegard’s law.The total conductivity of the x=0.3 composition is 6.03×10-5 S·cm-1at room temperature with an activation energy of 0.30 eV.These lithium garnet oxides exhibit lithium ionic transport that is relevant to lithium battery application.

【Abstract】 In order to obtain a safe,reliable,long-lived battery system without use of flammable,volatile,and relatively unstable organic liquid-based electrolytes,lithium garnet oxides with formulas Li7-xLa3Zr2-xTaxO12（x=0.2-1）were synthesized by the solid state reaction method.Single cubic phases were observed in the composition x range between 0.2 and 1.The lattice parameters decreased with the addition of Ta due to the smaller ionic radius of Ta5+compared with that of Zr4+,following the Vegard’s law.The total conductivity of the x=0.3 composition is 6.03×10-5 S·cm-1at room temperature with an activation energy of 0.30 eV.These lithium garnet oxides exhibit lithium ionic transport that is relevant to lithium battery application.

【关键词】 solid electrolytes； cubic garnet； Ta substitution； ionic conductivity；
【Key words】 solid electrolytes； cubic garnet； Ta substitution； ionic conductivity；
【基金】 Funded by the National Natural Science Foundation of China(No.21276284);the Hunan Provincial Natural Science Foundation of China(2015JJ3074);the Science and Technology Project of Changsha(KL403147-11);the Postdoctoral Fund of Hunan Agricultural University(129263)
  • 【文献出处】 Journal of Wuhan University of Technology(Materials Science) ,武汉理工大学学报(材料科学版)(英文版) , 编辑部邮箱 ,2017年06期
  • 【分类号】O646
  • 【下载频次】35
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