阳极
电池(电)
电解质
阴极
大气温度范围
材料科学
航程(航空)
二聚体
电化学
钠离子电池
铋
化学
化学工程
溶剂
热力学
电极
物理化学
复合材料
冶金
物理
有机化学
功率(物理)
法拉第效率
工程类
作者
Li Zhi,Zhang Yu,Jianhua Zhang,Yongjie Cao,Jiawei Chen,Haimei Liu,Yangang Wang
标识
DOI:10.1002/ange.202116930
摘要
Sodium-ion batteries (SIBs), as one of the potential candidates for grid-scale energy storage systems, are required to tackle extreme weather conditions. However, the all-weather SIBs with a wide operation-temperature range are rarely reported. Herein, we propose a wide-temperature range SIB, which involves a carbon-coated Na4Fe3(PO4)2P2O7 (NFPP@C) cathode, a bismuth (Bi) anode, and a diglyme-based electrolyte. We demonstrate that solvated Na+ can be directly stored by the Bi anode via an alloying reaction without the de-solvent process. Furthermore, the NFPP@C cathode exhibits a high Na+ diffusion coefficient at low temperature. As a result, the Bi//NFPP@C battery exhibits perfect low-temperature behavior. Even at −70 °C, this battery still delivers 70.19 % of the room-temperature capacity. Furthermore, benefitting from the high boiling point of the electrolyte, this battery also works well at a high temperature of up to 100 °C. These results are encouraging for the further exploration of wide-temperature range SIBs.
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