化学
兴奋剂
阴极
过渡金属
结构稳定性
容量损失
离子
化学工程
降级(电信)
无机化学
电化学
电极
物理化学
光电子学
催化作用
材料科学
有机化学
工程类
电信
结构工程
计算机科学
作者
Changlong Lei,Yuming Liu,Weijia Tang,Yunjiao Li,Yi Cheng,Guangsheng Huo,Zhenjiang He
标识
DOI:10.1016/j.jelechem.2024.118557
摘要
O3-type NaTMO2 (TM = transition metal) is highly anticipated as a cathode for sodium-ion batteries due to its high theoretical specific capacity and low cost. However, the irreversible phase transition during sodiation/desodiation and the Jahn-Teller effect induced by Mn3+ have hindered its steps towards industrialization. Herein, we propose a doping strategy to enhance the structural stability of O3-type NaNi1/3Fe1/3Mn1/3O2 through Zr doping. On the one hand, the Na+ transport channels are broadened due to the enlarged layer spacing, which accelerates the kinetic processes. On the other hand, Zr doping maintains structural integrity, inhibiting the decay of the layered structure. As a result, the uniquely designed material NNFMZO-6000 exhibited a discharge specific capacity of 113.8 mAh g−1 at 1 C and a capacity retention of 67.54 % after 200 cycles. This work presents an effective modification method to optimize the properties of O3-type NaTMO2 materials.
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