Li/Li7La3Zr2O12/LiFePO4 All-Solid-State Battery with Ultrathin Nanoscale Solid Electrolyte

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• 作者：Xufeng Yan ; Zhuobin Li ; Zhaoyin WenWeiqiang Han
• 刊名：Journal of Physical Chemistry C
• 出版年：2017
• 出版时间：January 26, 2017
• 年：2017
• 卷：121
• 期：3
• 页码：1431-1435
• 全文大小：404K
• ISSN：1932-7455

文摘

We introduced the nanoconcept in the oxide solid electrolyte Li₇La₃Zr₂O₁₂ (LLZO). All-solid-state Li/LiFePO₄ (LFPO) cell using this solid electrolyte with thickness of several micrometers was assembled with appropriate solvent, dispersant, adhesives, and surfactant without cold- or hot-pressing. At room temperature, the Li/LLZO/LFPO cell showed the first discharge capacity of 160.4 mAh g^–1, which was 94.4% of the theoretical capacity of LFPO, and the cell provided a discharge capacity of 136.8 mAh g^–1 after 100 cycles. At 60 °C, the battery presented more stable electrochemical performance. The capacity loss during cycles 2–100 was only 0.06% (0.7 mAh g^–1). The excellent performance could be attributed to the ultrathin solid electrolyte film.