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Polyvinylpyrrolidone‐Mediated In Situ Synthesis of Well‐Connected Ni 3 V 2 O 8 /C Nanocomposite Anode for Lithium‐Ion Batteries
Author(s) -
Zheng Yan-Zhen,
Yang Ningning,
Qin Pengcheng,
Lv Xinding,
Wu Qibing,
Shan Xin,
Yao Yixin,
Ding Haiyang,
Tao Xia
Publication year - 2020
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201901461
Subject(s) - materials science , polyvinylpyrrolidone , nanocomposite , anode , amorphous solid , electrochemistry , nanoparticle , chemical engineering , lithium (medication) , electrode , nanotechnology , crystallography , polymer chemistry , chemistry , medicine , endocrinology , engineering
A Ni 3 V 2 O 8 /C nanocomposite (nano‐NVO/C) is prepared using a facile solvothermal and postcalcination method, in which polyvinylpyrrolidone (PVP) is adopted as the carbon source and simultaneously prevents the aggregation of Ni 3 V 2 O 8 nanoparticles to enable in situ formation of highly dispersed Ni 3 V 2 O 8 nanoparticles around amorphous C. Microstructural characterization shows that elastic amorphous C serves as filler to fill the voids within Ni 3 V 2 O 8 nanoparticles, bridging the Ni 3 V 2 O 8 nanoparticles, improving electron transport ability, and withstanding the crystal stress coming from Li + insertion/extraction. As a consequence, the electrochemical performances including discharge capacity, cycling stability, and rate capacity of nano‐NVO/C are greatly enhanced, delivering a superior cycling capacity of 1284 mA h g −1 at a current density of 0.3 A g −1 after 300 cycles. Electrochemical kinetics studies show that the charge storage in nano‐NVO/C is controlled by the pseudocapacitive mechanism.