Intercalation Pseudocapacitive Zn2+Storage with Hydrated Vanadium Dioxide toward Ultrahigh Rate Performance

被引：227

作者：

Liu, Nannan ^{[1
]}

Wu, Xian ^{[1
]}

Fan, Lishuang ^{[1
,2
]}

Gong, Shan ^{[1
]}

Guo, Zhikun ^{[1
]}

Chen, Aosai ^{[1
]}

Zhao, Chenyang ^{[1
]}

Mao, Yachun ^{[2
]}

Zhang, Naiqing ^{[1
,2
]}

Sun, Kening ^{[1
,2
]}

机构：

[1] Harbin Inst Technol, Sch Chem & Chem Engn, State Key Lab Urban Water Resource & Environm, Harbin 150001, Peoples R China

[2] Harbin Inst Technol, Acad Fundamental & Interdisciplinary Sci, Harbin 150001, Peoples R China

来源：

ADVANCED MATERIALS | 2020年 / 32卷 / 42期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

defective structures; intercalation pseudocapacitance; vanadium dioxide; ION; CATHODE;

D O I：

10.1002/adma.201908420

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The weak van der Waals interactions enable ion-intercalation-type hosts to be ideal pseudocapacitive materials for energy storage. Here, a methodology for the preparation of hydrated vanadium dioxide nanoribbon (HVO) with moderate transport pathways is proposed. Out of the ordinary, the intercalation pseudocapacitive reaction mechanism is discovered for HVO, which powers high-rate capacitive charge storage compared with the battery-type intercalation reaction. The main factor is that the defective crystalline structure provides suitable ambient spacing for rapidly accommodating and transporting cations. As a result, the HVO delivers a fast Zn(2+)ion diffusion coefficient and a low Zn(2+)diffusion barrier. The electrochemical results with intercalation pseudocapacitance demonstrate a high reversible capacity of 396 mAh g(-1)at 0.05 A g(-1), and even maintain 88 mAh g(-1)at a high current density of 50 A g(-1).

引用

页数：8

共 44 条

[1] Electrochemical Zinc Intercalation in Lithium Vanadium Oxide: A High-Capacity Zinc-Ion Battery Cathode [J].