Lithium ion conductivity of the B-site substitution in Li3xLa0.67−xRE
y
III
Ti1−2yPyO3 system (REIII=Sc3+, Y3+, Nd3+, Sm3+, Eu3+, Yb3+) |
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Authors: | Ronghua Li Liyun Zi Chunzhi Shen Wenji Wang |
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Institution: | (1) Department of Chemistry, Fuzhou University, 350002 Fuzhou, Fujian, China |
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Abstract: | The B-site substituted perovskite solid solution systems Li3xLa0.67?xREyTi1?2yPyO3 (RE=Sc, Y, Nd, Sm, Eu, Yb) have been investigated. Perovskite solid solutions formed in the range of x=0.10, y<0.10 for RE=Sc3+, Y3+, Yb3+, x=0.10, y≤0.05 for RE=Nd3+, Sm3+, Eu3+. Li0.3La0.57Nd0.05Ti0.9P0.05O3 has the highest bulk conductivity of 4.31×10?4 S·cm?1 and the highest total conductivity of 2.52×10?4 S·cm?1 at room temperature in all prepared compositions. The compositions have low activation energies of about 24–30 kJ/mol in the temperature ranges of 298–523 K. SEM studies showed that the sample made by solid-state reaction has a sphere-like morphology and a rough particle with particle size of about 50 µm. The research results also indicated that the reaction temperature decreases and the electrochemical stabilities of the titanate-based perovskite-type solid solutions are improved by using RE3+ and P5+ replaced Ti4+ on B-site in the Li3xLa0.67?xTiO3 parent. |
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