普鲁士蓝
电解质
材料科学
电池(电)
碳酸丙烯酯
阴极
电化学
离子电导率
化学工程
电极
无机化学
化学
物理化学
功率(物理)
工程类
物理
量子力学
作者
Bingxing Xie,Liguang Wang,Haifeng Li,Hua Huo,Can Cui,Bo Sun,Yulin Ma,Jiajun Wang,Geping Yin
标识
DOI:10.1016/j.ensm.2020.12.008
摘要
A semi-solid state (SSS) electrolyte with high ionic conductivity of 2.6 × 10−3 S cm−1 is designed to avoid problems of interfacial side reactions brought by typical liquid carbonate electrolyte in Prussian blue-based sodium-ion batteries, as well as Na dendrite growth. The solidification mechanism is related to FEC polymerization triggered by 5 wt% AlCl3 Lewis acid addition in pristine liquid electrolyte. The SSS electrolyte enables the intrinsic high-reversibility of rhombohedral Prussian blue analogue (r-PBA) cathode, and ultra-long lifetime of 3000 and 4000 cycles at 1 and 2 C, and high rate capacities of 121 mAh g−1 at 1 C and 88 mAh g−1 at 10 C are achieved. The improved cyclability and rate capability are ascribed to interface reinforcement between r-PBA and electrolyte due to the protection of formed poly(vinylene carbonate) on r-PBA. This work provides valuable insights into the growing significance of interface stability for rhombohedral structure in Prussian blue analogue.
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