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A High‐Rate V 2 O 5 Hollow Microclew Cathode for an All‐Vanadium‐Based Lithium‐Ion Full Cell
Author(s) -
Zhang Pengfei,
Zhao Luzi,
An Qinyou,
Wei Qiulong,
Zhou Liang,
Wei Xiujuan,
Sheng Jinzhi,
Mai Liqiang
Publication year - 2016
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201503214
Subject(s) - materials science , vanadium , anode , electrochemistry , calcination , lithium (medication) , cathode , vanadium oxide , ion , chemical engineering , nanotechnology , nanowire , electrode , catalysis , chemistry , metallurgy , medicine , biochemistry , organic chemistry , engineering , endocrinology
V 2 O 5 hollow microclews (V 2 O 5 ‐HMs) have been fabricated through a facile solvothermal method with subsequent calcination. The synthesized V 2 O 5 ‐HMs exhibit a 3D hierarchical structure constructed by intertangled nanowires, which could realize superior ion transport, good structural stability, and significantly improved tap density. When used as the cathodes for lithium‐ion batteries (LIBs), the V 2 O 5 ‐HMs deliver a high capacity (145.3 mAh g ‐1 ) and a superior rate capability (94.8 mAh g ‐1 at 65 C). When coupled with a lithiated Li 3 VO 4 anode, the all‐vanadium‐based lithium‐ion full cell exhibits remarkable cycling stability with a capacity retention of 71.7% over 1500 cycles at 6.7 C. The excellent electrochemical performance demonstrates that the V 2 O 5 ‐HM is a promising candidate for LIBs. The insight obtained from this work also provides a novel strategy for assembling 1D materials into hierarchical microarchitectures with anti‐pulverization ability, excellent electrochemical kinetics, and enhanced tap density.