化学
相间
电解质
阳极
硅
磷
阴极
大气温度范围
离子
热稳定性
化学工程
适应性
纳米技术
有机化学
电极
物理化学
材料科学
热力学
物理
工程类
生态学
生物
遗传学
作者
Hao‐Jie Liang,Huan Liu,Xinxin Zhao,Zhen‐Yi Gu,Jialin Yang,Xinyi Zhang,Zhiming Liu,Yuanzheng Tang,Jingping Zhang,Xing‐Long Wu
摘要
All-weather operation is considered an ultimate pursuit of the practical development of sodium-ion batteries (SIBs), however, blocked by a lack of suitable electrolytes at present. Herein, by introducing synergistic manipulation mechanisms driven by phosphorus/silicon involvement, the compact electrode/electrolyte interphases are endowed with improved interfacial Na-ion transport kinetics and desirable structural/thermal stability. Therefore, the modified carbonate-based electrolyte successfully enables all-weather adaptability for long-term operation over a wide temperature range. As a verification, the half-cells using the designed electrolyte operate stably over a temperature range of -25 to 75 °C, accompanied by a capacity retention rate exceeding 70% even after 1700 cycles at 60 °C. More importantly, the full cells assembled with Na3V2(PO4)2O2F cathode and hard carbon anode also have excellent cycling stability, exceeding 500 and 1000 cycles at -25 to 50 °C and superb temperature adaptability during all-weather dynamic testing with continuous temperature change. In short, this work proposes an advanced interfacial regulation strategy targeted at the all-climate SIB operation, which is of good practicability and reference significance.
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