Zr-doped P2-Na_0.75Mn_0.55Ni_0.25Co_0.05Fe_0.10Zr_0.05O₂ as high-rate performance cathode material for sodium ion batteries

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• 作者：Zheng-Yao Li^a ; Rui Gao^a ; Limei Sun^b ; Zhongbo Hu^a ; Xiangfeng Liu^a ; ^{liuxf@ucas.ac.cn} ; ^{xiangfengliu2008@163.com}
• 关键词：layered oxides ; cathode materials ; P2-structure ; sodium-ion battery ; electrical conductivity
• 刊名：Electrochimica Acta
• 出版年：2017
• 出版时间：1 January 2017
• 年：2017
• 卷：223
• 期：Complete
• 页码：92-99
• 全文大小：2019 K
• 卷排序：223

文摘

Zr-ion substitution decreases lattice parameter a and expand the lattice parameter c. Zr4+ doped P2-Na0.75Mn0.55Ni0.25Co0.05Fe0.10Zr0.05O2 show enhanced rate capability and cyclic performance. The aliovalent substitution of Zr4+ for Fe3+ improves the electronic conductivity. The stronger ZrO bond also contributes to the enhanced electrochemical performances.