Zn/Ti/F synergetic-doped Na0.67Ni0.33Mn0.67O2 for sodium-ion batteries with high energy density

被引：30
作者：
Fan, Yong [1 ]
Ye, Xianchang [1 ]
Yang, Xiaofen [1 ]
Guan, Lianyu [1 ]
Chen, Chunhua [3 ,4 ]
Wang, Huan [2 ]
Ding, Xiang [1 ]
机构：
[1] Fujian Normal Univ, Fujian Prov Univ Engn Res Ctr Efficient Battery Mo, Coll Chem & Mat Sci, Fujian Key Lab Polymer Mat, 32 Shangsan Rd, Fuzhou 350007, Peoples R China
[2] Nankai Univ, Key Lab Adv Energy Mat Chem, Minist Educ, Tianjin 300071, Peoples R China
[3] Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230026, Anhui, Peoples R China
[4] Univ Sci & Technol China, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Hefei 230026, Anhui, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY A | 2023年 / 11卷 / 07期
基金：
中国国家自然科学基金;
关键词：
LAYERED CATHODE; POSITIVE ELECTRODE; OXIDE CATHODES; PERFORMANCE; VOLTAGE;
D O I：
10.1039/d2ta08315a
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
P2-Na0.67Ni0.33Mn0.67O2 is a promising cathode for sodium-ion batteries due to its high theoretical capacity, but it elicits a harmful phase transformation and severe fading of capacity above 4.2 V. Here, we report creation of a Zn/Ti/F synergetic-doped Na0.67Ni0.33Mn0.67O2 cathode material using a typical sol-gel method. Benefiting from the synergistic effect of Zn/Ti/F doping, the structure was stabilized and the phase transition of P2-O2 was inhibited. In particular, Na0.67Ni0.28Zn0.05Mn0.62Ti0.05O1.95F0.05 (NNZMTOF) exhibited improved rate capability (79.5 mA h g(-1) at 10C) and excellent cycling stability (86% capacity retention after 1000 cycles at 10C). The assembled NNZMTOF//hard carbon full-cell could deliver a high energy density of 320.5 W h kg(-1). Therefore, such a Zn/Ti/F synergetic-doping strategy provides an effective and simple approach for designing layered oxide cathode materials with high energy density.
引用
收藏
页码：3608 / 3615
页数：8
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