Graphene Oxide Wrapped CuVO Nanobelts as High-Capacity and Long-Life Cathode Materials of Aqueous Zinc-Ion Batteries.

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ID: 54360
2019
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Abstract
Rechargeable aqueous zinc-ion batteries are considered as a promising alternative of lithium-ion batteries for stationary energy storage because of their economical and high safety quality. However, their widespread application is still impeded by the development of cathode materials with poor energy density and limited long-term stability. Herein, we report a high-performance CuVO cathode material for aqueous zinc-ion batteries and elucidate the zinc-storage mechanism. The reversible phase transformation between CuVO and ZnVO, accompanied by zinc ion insertion/extraction and the reduction/oxidation of metallic Cu nanoparticles, all contribute to excellent battery performance: an impressively high specific capacity of 427 mA h g at current density of 0.1 A g, long-term cycling stability with minor capacity loss (0.7%) after 3000 cycles at a high current density of 5 A g, and a high energy density of 317 Wh kg at a power density of 210 W kg. Furthermore, graphene oxide wrapped CuVO nanocomposites are successfully fabricated, which demonstrates the significantly enhanced specific capacity (at least 30% improvement). This work provides an intriguing cathode material and expands available options of transition metal vanadate materials for zinc-ion batteries.
Reference Key
liu2019grapheneacs Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Liu, Yuyi;Li, Qian;Ma, Kaixuan;Yang, Gongzheng;Wang, Chengxin;
Journal acs nano
Year 2019
DOI
10.1021/acsnano.9b06484
URL
Keywords
cuv2o6 cathode high capacity long life zinc-ion batteries

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