Tuning the component ratio and corresponding sodium storage properties of layer-tunnel hybrid Na0.6Mn1-xNixO2 cathode by a simple cationic Ni2+ doping strategy

被引:29
作者
Chen, Hui [1 ]
Wu, Zhenguo [1 ,2 ]
Zheng, Zhuo [3 ]
Chen, Tingru [1 ]
Guo, Xiaodong [1 ,4 ]
Li, Juntao [5 ]
Zhong, Benhe [1 ]
机构
[1] Sichuan Univ, Coll Chem Engn, Chengdu 610065, Sichuan, Peoples R China
[2] Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China
[3] Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn, Chengdu 610065, Sichuan, Peoples R China
[4] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia
[5] Xiamen Univ, Coll Energy, Xiamen 361005, Peoples R China
基金
中国国家自然科学基金;
关键词
Sodium ion batteries; Manganese-based oxide; Layer-tunnel hybrid cathode; Structure component tuning; Cationic doping; IMPROVED ELECTROCHEMICAL PERFORMANCE; NA-ION BATTERIES; RECHARGEABLE BATTERY; ELECTRODE MATERIALS; MANGANESE OXIDES; NA0.44MNO2; CHALLENGES; CAPACITY; OXYGEN; LI;
D O I
10.1016/j.electacta.2018.04.006
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Manganese (Mn)-based cathodes with advantages of low-cost, environmental benign, high energy density are crucial for the commercial process of sodium ion batteries (SIBs). Layer-tunnel hybrid cathode, which aims to integrate high capacity of P2-type layered structure with excellent cycling stability, superior rate performance of tunnel structure, deserves great research efforts. To further enhance the respective performance, the ratio of layer-tunnel component in the hybrid Na0.6Mn1-xNixO2 was adjusted by a simple cationic Ni2+ doping route. The crystal structure and electrochemical behavior of Na0.6Mn1-xNixO2 were carefully detected, compared and analyzed. The comprehensive results evidenced that the layered component ratio would rapidly increase with Ni2+ doping. The structural parameters of pure phase would also be affected by varied Ni2+ content. And 5% Ni doping could be an optimized point in terms of reversible capacity, cycling stability, rate performance and reaction kinetics. This study would reveal the dual-function of cationic doping in both macro scale component ratio and atomic scale crystal lattice parameter, and grasp new insight into the design and optimization of high performance hybrid cathode for SIBs. (c) 2018 Published by Elsevier Ltd.
引用
收藏
页码:63 / 70
页数:8
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