FeSe2 clusters with excellent cyclability and rate capability for sodium-ion batteries

被引：98

作者：

Wei, Xiujuan ^{[1
]}

Tang, Chunjuan ^{[1
,2
]}

An, Qinyou ^{[1
]}

Yan, Mengyu ^{[1
]}

Wang, Xuanpeng ^{[1
]}

Hu, Ping ^{[1
]}

Cai, Xinyin ^{[1
]}

Mai, Liqiang ^{[1
,3
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Hubei, Peoples R China

[2] Luoyang Inst Sci & Technol, Dept Math & Phys, Luoyang 471023, Peoples R China

[3] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

来源：

NANO RESEARCH | 2017年 / 10卷 / 09期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

FeSe2; clusters; superior rate capability; excellent cycling stability; sodium-ion batteries; pseudocapacitive behavior; LI-ION; SUPERIOR CATHODE; ANODE MATERIAL; HIGH-CAPACITY; PERFORMANCE; CARBON; GRAPHENE; STORAGE; NANOWIRES; NANOPARTICLES;

D O I：

10.1007/s12274-017-1537-z

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：

Sodium-ion batteries (SIBs) have great promise for sustainable and economical energy-storage applications. Nevertheless, it is a major challenge to develop anode materials with high capacity, high rate capability, and excellent cycling stability for them. In this study, FeSe2 clusters consisting of nanorods were synthesized by a facile hydrothermal method, and their sodium-storage properties were investigated with different electrolytes. The FeSe2 clusters delivered high electrochemical performance with an ether-based electrolyte in a voltage range of 0.5-2.9 V. A high discharge capacity of 515 mAh.g(-1) was obtained after 400 cycles at 1 A.g(-1), with a high initial columbic efficiency of 97.4%. Even at an ultrahigh rate of 35 A.g(-1), a specific capacity of 128 mAh.g(-1) was achieved. Using calculations, we revealed that the pseudocapacitance significantly contributed to the sodium-ion storage, especially at high current rates, leading to a high rate capability. The high comprehensive performance of the FeSe2 clusters makes them a promising anode material for SIBs.

引用

页码：3202 / 3211

页数：10

共 57 条

[31] In search of an optimized electrolyte for Na-ion batteries [J].