材料科学
电解质
离子电导率
锂(药物)
电化学
阳极
煅烧
电导率
复合数
化学工程
阴极
兴奋剂
氟
无机化学
复合材料
电极
冶金
光电子学
医学
化学
物理化学
工程类
内分泌学
生物化学
催化作用
作者
J. T. Liu,Fusheng Yin,Yuezhen Mao,Chunwen Sun
标识
DOI:10.1021/acsami.4c05217
摘要
Garnet-based electrolytes with high ionic conductivity and excellent stability against lithium metal anodes are promising for commercial applications in solid-state lithium batteries (SSLBs). However, the further development of SSLBs is inhibited by issues such as low ionic conductivity and uncontrolled lithium dendrite growth. Herein, we report the synthesis of fluorine-doped Li7La3Zr2O12 (LLZO-F0.2) fibers by electrospinning and the subsequent calcination at high temperatures. The solid composite electrolyte with LLZO-F0.2 exhibits an ionic conductivity of 5.37 × 10–4 S cm–1 and a high lithium-ion transference number of 0.61 at room temperature. Meanwhile, it exhibits lower resistance and more uniform lithium metal stripping and deposition in symmetric cells. The full cell with LiFePO4 cathode exhibits excellent rate capability and cycling stability for 800 cycles at 0.5 C with a discharge specific capacity retention of 97.7%. This fluorine-doped fibrous garnet-type electrolyte provides a viable option for preparing high-performance SSLBs.
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