Effect of substitution (Ta, Al, Ga) on the conductivity of Li7La3Zr2O12
Effect of substitution (Ta, Al, Ga) on the conductivity of Li7La3Zr2O12
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DOI：
10.1016/j.jpowsour.2012.01.131
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发表时间：
2012-05-15
影响因子：
9.2
通讯作者：
Sakamoto, J.
中科院分区：
文献类型：
--
作者：
Allen, J. L.;Wolfenstine, J.;Sakamoto, J.
立方石榴石的组成为Li6.75La3Zr1.75Ta0.25O12。用共沉淀法制备了Li6.15La3Zr1.75Ta0.25Al0.2O12和Li6.15La3Zr1.75Ta0.25Ga0.2O12，并用热压法制备了相对密度接近96-98%的Li6.15La3Zr1.75Ta0.25Ga0.2O12。计算了Li6.75La3Zr1.75Ta0.25O12在298K下的总锂离子电导率和活化能。Li6.15La3Zr1.75Ta0.25Al0.2O12和Li6.15La3Zr1.75Ta0.25Ga0.2O12分别为0.87ms cm(-1)(0.22 eV)、0.37ms cm(-1)(0.30 eV)和0.41ms cm(-1)(0.27 eV)。上述结果表明，锂离子亚晶格外的立方稳定取代有利于获得较快的锂离子导电性。爱思唯尔出版公司(Elsevier B.V.)
Cubic garnets of composition Li6.75La3Zr1.75Ta0.25O12. Li6.15La3Zr1.75Ta0.25Al0.2O12, and Li6.15La3Zr1.75Ta0.25Ga0.2O12 were prepared from a co-precipitated precursor and consolidated by hot-pressing to a relative density of similar to 96-98%. The total Li-ion conductivities at 298 K and activation energies (in parentheses) of Li6.75La3Zr1.75Ta0.25O12. Li6.15La3Zr1.75Ta0.25Al0.2O12 and Li6.15La3Zr1.75Ta0.25Ga0.2O12 were 0.87 mS cm(-1) (0.22 eV), 0.37 mS cm(-1) (0.30 eV) and 0.41 mS cm(-1) (0.27 eV), respectively. The above results suggest that cubic stabilizing substitutions outside of the Li-ion sub-lattice are preferable to obtain faster Li-ion conductivity. Published by Elsevier B.V.