NiSe2 Nanooctahedra as an Anode Material for High-Rate and Long-Life Sodium-Ion Battery

被引:236
|
作者
Zhu, Shaohua [1 ]
Li, Qidong [1 ]
Wei, Qiulong [1 ]
Sun, Ruimin [1 ]
Liu, Xiaoqing [2 ]
An, Qinyou [1 ]
Mai, Liqiang [1 ]
机构
[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China
[2] Wuhan Univ Technol, Ctr Mat Res & Testing, Wuhan 430070, Peoples R China
基金
中国国家自然科学基金;
关键词
sodium-ion batteries; NiSe2; nanooctahedra; anode; high-rate; long-term cycle life; ENERGY-STORAGE; FACILE SYNTHESIS; CHALLENGES; SYSTEMS; LITHIUM; MICROSPHERES; NANOCRYSTALS; MECHANISM; HYBRID;
D O I
10.1021/acsami.6b10143
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
In this article, we report NiSe2 nanooctahedra as a promising anode material for sodium-ion batteries (SIBs). They exhibit outstanding long-term cyclic stability (313 mAh/g after 4000 cycles at 5 A/g) and excellent high-rate capability (175 mAh/g at 20 A/g). Besides, the initial Coulombic efficiency of NiSe2 is also very impressive (over 90%). Such remarkable performances are attributed to good conductivity, structural stability, and the pseudocapacitive behavior of the NiSe2. Furthermore, the sodium ion storage mechanism of NiSe2 is first investigated by in situ XRD and ex situ XRD. These highlights give NiSe2 a competitive strength for rechargeable SIBs.
引用
收藏
页码:311 / 316
页数:6
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