电解质
溶剂化
阴极
氧化物
降级(电信)
材料科学
化学工程
分解
离子
水分
钠
分子
化学分解
无机化学
化学
电极
复合材料
计算机科学
物理化学
有机化学
冶金
工程类
电信
作者
Youchen Hao,Yufan Xia,Wen Lei,Guangling Sun,Lei Feng,Xiaochong Zhou,Sikandar Iqbal,Tian Zhang,Zhongcai Zhang,Li Yong,Xuan Zhang,Yinzhu Jiang
标识
DOI:10.1002/advs.202401514
摘要
Abstract Layered oxides of sodium‐ion batteries suffer from severe side reactions on the electrode/electrolyte interface, leading to fast capacity degradation. Although surface reconstruction strategies are widely used to solve the above issues, the utilization of the low‐cost wet chemical method is extremely challenging for moisture‐sensitive Na‐based oxide materials. Here, the solvation tuning strategy is proposed to overcome the deterioration of NaNi 1/3 Mn 1/3 Fe 1/3 O 2 in water‐based solution and conduct the surface reconstruction. When capturing the water molecules by the solvation structure of cations, here is Li + , the structural collapse and degradation of layered oxides in water‐based solvents are greatly mitigated. Furthermore, Li(H 2 O) 3 EA + promotes the profitable Li + /Na + exchange to build a robust surface, which hampers the decomposition of electrolytes and the structural evolution upon cycling. Accordingly, the lifespan of Li‐reinforced materials is prolonged to three times that of the pristine one. This work represents a step forward in understanding the surface reconstruction operated in a water‐based solution for high‐performance sodium layered oxide cathodes.
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