Chemical Research in Chinese Universities ›› 2021, Vol. 37 ›› Issue (2): 286-292.doi: 10.1007/s40242-021-0443-9

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Multilayer Porous Vanadium Nitride Microsheets Anodes for Highly Stable Na-ion Batteries

HU Tao1, YANG Weiwei1, WANG Cheng1, BU Yali1, JIN Feng1, ZHANG Dongwen1, GU Min1, LIU Wenhui1, LIANG Qinghua2, LIU Ruiqing1, FENG Xiaomiao1, MA Yanwen1   

  1. 1. 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 & Telecommunications, Nanjing 210023, P. R. China;
    2. Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
  • Received:2020-12-29 Online:2021-04-01 Published:2021-03-16
  • Contact: MA Yanwen, LIU Ruiqing E-mail:iamywma@njupt.edu.cn;iamrqliu@njupt.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos.91963119, 51772157, 21805140, 21905141), the Priority Academic Deve-lopment Program of the Jiangsu Higher Education Institutions, China (No.YX030003), the China Postdoctoral Science Foundation(No.2018M642287), the Jiangsu Province Postdoctoral Research Grant Program, China (No.2018K156C), the Project of the Jiangsu National Synergetic Innovation Center for Advanced Materials, China(SICAM), the Project of the Synergetic Innovation Center for Organic Electronics and Information Displays, and the Project of the Australian Research Council(No.DE190100445).

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%.

Key words: Multilayer porous structure, Vanadium nitride, Anode material, Na+ insertion/extraction, Sodium ion battery