Multilayer Porous Vanadium Nitride Microsheets Anodes for Highly Stable Na-ion Batteries |
| |
Authors: | HU Tao YANG Weiwei WANG Cheng BU Yali JIN Feng ZHANG Dongwen GU Min LIU Wenhui LIANG Qinghua LIU Ruiqing FENG Xiaomiao MA Yanwen |
| |
Affiliation: | Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials(IAM),Jiangsu National Synergistic Innovation Center for Advanced Materials(SICAM),Nanjing University of Posts&Telecommu-nications,Nanjing 210023,P.R.China;Department of Chemical Engineering,The University of Melbourne,Parkville,VIC 3010,Australia |
| |
Abstract: | Sodiumion batteries(SIBs) have attracted intensive attention as promising alternative to lithium-ionbatteries(LIBs) for large scale energy storage systems because of low cost of sodium, similar energy storage mechanism and the reasonable performance. However, it is still a great challenge to search and design a robust structure of anode materials with excellent cycling stability and high rate capability for SIBs. Herein, multilayer porous vanadium nitride (VN) microsheets are synthesized through a facile and scalable hydrothermal synthesis-nitrogenization strategy as an effective anode material for SIBs. The multilayer porous VN microsheets not only offer more active sites for fast Na+ insertion/extraction process and short diffusion pathway, but also effectively buffer the volume change of anode due to more space in the multilayer porous structure. The large proportions of capacitive behavior imply that the Na+ charge storage depends on the intercalation pseudocapacitive mechanism. The multilayer porous VN microsheets electrodes ma-nifest excellent cycling stability and rate capability, delivering a discharge capacity of 156.1 mA·h/g at 200 mA/g after 100 cycles, and a discharge capacity of 111.9 mA·h/g at 1.0 A/g even after 2300 cycles with the Coulombic efficiency of nearly 100%. |
| |
Keywords: | Multilayer porous structure Vanadium nitride Anode material Na+ insertion/extraction Sodium ion battery |
本文献已被 维普 万方数据 等数据库收录! |
| 点击此处可从《高等学校化学研究》浏览原始摘要信息 |
|
点击此处可从《高等学校化学研究》下载全文 |
|