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A 1D Honeycomb‐Like Amorphous Zincic Vanadate for Stable and Fast Sodium‐Ion Storage
Author(s) -
Qin Zhongzheng,
Lv Chade,
Pei Jian,
Yan Chunshuang,
Hu Yongyuan,
Chen Gang
Publication year - 2020
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.201906214
Subject(s) - anode , materials science , amorphous solid , calcination , vanadium , chemical engineering , sodium ion battery , sodium , nanomaterials , electrospinning , nanotechnology , ion , electrochemistry , faraday efficiency , electrode , chemistry , composite material , metallurgy , catalysis , biochemistry , polymer , organic chemistry , engineering
Developing nanomaterials with synergistic effects of various structural merits is considered to be an effective strategy to improve the sluggish ion kinetics and severe structural degradation of sodium‐ion battery (SIB) anodes. Herein, honeycomb‐like amorphous Zn 2 V 2 O 7 (ZVO‐AH) nanofibers as SIBs anode material with plentiful defective sites, complex cavities, and good mechanical flexibility are reported. The fabrication strategy relies on the expansive and volatile nature of the organic vanadium source, based on a simple electrospinning with subsequent calcination. Originating from the synergies of amorphous nature and honeycomb‐like cavities, ZVO‐AH shows increased electrochemical activity, accelerated Na‐ion diffusion, and robust structure. Impressively, the ZVO‐AH anode delivers superior cycle stability (112% retention at 5 A g −1 after 5000 cycles) and high rate capability (150 mAh g −1 at 10 A g −1 ). The synthetic versatility is able to synergistically promote the practical application of more potential materials in sodium‐ion storage.