Superior Electrochemical Performance of WNb2O8 Nanorods Triggered by Ultra-Efficient Li+ Diffusion

被引：11

作者：

Zhou, Zhuren ^{[1
]}

Lou, Shuaifeng ^{[1
]}

Cheng, Xinqun ^{[1
]}

Cui, Binghan ^{[1
]}

Si, Wei ^{[1
]}

Ding, Fei ^{[2
]}

Ma, Yulin ^{[1
]}

Zuo, Pengjian ^{[1
]}

Du, Chunyu ^{[1
]}

Wang, Jiajun ^{[1
]}

Yin, Geping ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Chem & Chem Engn, MIIT Key Lab Crit Mat Technol New Energy Convers, Harbin 150006, Peoples R China

[2] Tianjin Inst Power Sources, Sci & Technol Power Sources Lab, Tianjin 300384, Peoples R China

来源：

CHEMISTRYSELECT | 2020年 / 5卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Lithium ion battery; WNb2O8; nanorod; High-rate property; pseudocapacitance; LITHIUM-ION; FACILE SYNTHESIS; ANODE MATERIALS; EXCELLENT PERFORMANCE; TINB2O7; ANODE; ENERGY; NANOWIRES; NIOBIUM; STORAGE; INSERTION;

D O I：

10.1002/slct.201904220

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Advanced anode materials with high rate performance and high safety are greatly desired for power lithium ion batteries. Herein, one-dimensional WNb2O8 is synthesized via a simple solution method with succeeding thermal calcining, and is first employed as an anode material for power lithium ion batteries. WNb2O8 nanorods with diameters of 100-200 nm reveal a reversible capacity of 229.2 mAh g(-1) with high initial coulombic efficiency of 92 % at 0.2 C. WNb2O8 nanorods also possess high rate performance (150.7 mAh g(-1) at 10 C) and cycling stability (keeping 85.2 % of the initial capacity after 500 cycles at 5 C). Moreover, the calculation results prove that the intercalation pseudocapacitance, which is promoted by ultrahigh lithium ion diffusion efficiency, plays a significant role in the fast charge/discharge processes.

引用

页码：1209 / 1213

页数：5

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