李彦光教授课题组在Advanced Materials上发表论文

发布时间:2017-09-27访问量:11设置

题目:

Hierarchical VS2 Nanosheet Assemblies: A Universal Host Material for the Reversible Storage of Alkali Metal Ions

作者:

Junhua Zhou, Lu Wang, Mingye Yang, Jinghua Wu, Fengjiao Chen, Wenjing Huang, Na Han, Hualin Ye, Feipeng Zhao, Youyong Li, and Yanguang Li*

单位:

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou   215123, China

摘要:

Reversible electrochemical storage of alkali metal ions is the basis of many secondary batteries. Over years, various electrode materials are developed and optimized for a specific type of alkali metal ions (Li+, Na+, or K+), yet there are very few (if not none) candidates that can serve as a universal host material for all of them. Herein, a facile solvothermal method is developed to prepare VS2 nanosheet assemblies. Individual nanosheets are featured with   a few atomic layer thickness, and they are hierarchically arranged with minimized stacking. Electrochemical measurements show that VS2 nanosheet assemblies enable the rapid and durable storage of Li+, Na+, or K+ ions. Most remarkably, the large reversible specific capacity and great cycling stability observed for both Na+ and K+ are extraordinary and superior to most existing electrode materials. The experimental results of this study are further supported by density functional theory calculations showing that the layered structure of VS2 has large adsorption energy and low diffusion barriers for the intercalation   of alkali metal ions.

影响因子:

19.791

分区情况:

一区

链接:

http://onlinelibrary.wiley.com/doi/10.1002/adma.201702061/abstract



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