阴极
法拉第效率
氧化物
钠
材料科学
相(物质)
原材料
过渡金属
离子
相变
储能
纳米技术
化学工程
氧化钠
化学物理
化学
电化学
热力学
电极
冶金
物理化学
功率(物理)
工程类
物理
催化作用
有机化学
生物化学
作者
Qi Wang,Shiyong Chu,Shaohua Guo
标识
DOI:10.1016/j.cclet.2019.12.008
摘要
As one of the most promising secondary batteries in large-scale energy storage, sodium ion batteries (SIBs) have attracted wide attention due to the abundant raw materials and low cost. Layered transition metal oxides are one kind of popular cathode material candidates because of its easy synthesis and large theoretical specific capacity. Yet, the most common P2 and O3 phases show distinct structural characteristics respectively. O3 phase can serve as a sodium reservoir, but it usually suffers from serious phase transition and sluggish kinetics. For the P2 phase, it allows the fast sodium ion migration in the bulk and the structure can maintain stable, but it is lack of sodium, showing a great negative effect on Coulombic efficiency in full cell. Thus, single phase structure almost cannot achieve satisfied comprehensive sodium storage performances. Under these circumstances, exploiting novel multiphase cathodes showing synergetic effect may give solution to these problems. In this review, we summarize the recent development of multiphase layered transition metal oxide cathodes of SIBs, analyze the mechanism and prospect the future potential research directions.
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