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

页码：3608 / 3615

页数：8

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