A novel thin solid electrolyte film and its application in all-solid-state battery at room temperature

作者：Yan, Xufeng; Li, Zhuobin; Ying, Hangjun; Nie, Feng; Xue, Lixin; Wen, Zhaoyin; Han, Wei-Qiang^*

来源：Ionics, 2018, 24(5): 1545-1551.

DOI：10.1007/s11581-017-2353-x

• All-solid-state batteries
• Lithium batteries
• Solid electrolytes
• Garnets
• Membranes

A thin Li7La3Zr2O12 (LLZO) film of several micrometers was prepared by a novel method, which underwent the changes from micro-sized particles, nanoparticle slurry, and the final thin film. The LLZO film exhibited a high stability with metallic Li. The all-solid-state battery was composed by Li metal anode, a mixture cathode (LiCoO2 and LLZO), and the solid electrolyte of a composite of LLZO and LITFSI film. At room temperature, the Li/composite of LLZO and LITFSI/LCO cell showed a discharge capacity of 119.3 mAh g(-1) at a current density of 0.21 mA cm(-2) after 45 cycles, which was approximately 100% of that of the second cycle. Electrochemical impedance spectroscopy showed the reduction of the radius in low-frequency semicircle, demonstrating an improvement of interfacial contact between LLZO and LCO during the cycling.

• 出版日期2018-5
• 单位上海科技大学; 中国科学院; 中国科学院上海硅酸盐研究所; 浙江大学; 中国科学院大学