期刊
NANO RESEARCH
卷 13, 期 1, 页码 215-224出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-019-2603-5
关键词
VO2 center dot 0.2H(2)O nanocuboids; graphene sheet; aqueous zinc-ion battery; ultrahigh capacity; electron and ion transport
类别
资金
- China Postdoctoral Science Foundation [2018M630753, RZ1900011127]
- Qingdao Innovation Leading Talent Program
- Taishan Scholars Program
- Natural Science Foundation of Shandong [ZR2017BEM028]
- Science Foundation of Jiangsu Province [BK20171169]
- National Natural Science Foundation of China [51802168]
- Natural Science Foundation of Shandong Province [ZR2018BEM006]
- Qingdao Postdoctoral Application Research Project
Aqueous Zinc-ion batteries (ZIBs), using zinc negative electrode and aqueous electrolyte, have attracted great attention in energy storage field due to the reliable safety and low-cost. A composite material comprised of VO2 center dot 0.2H(2)O nanocuboids anchored on graphene sheets (VOG) is synthesized through a facile and efficient microwave-assisted solvothermal strategy and is used as aqueous ZIBs cathode material. Owing to the synergistic effects between the high conductivity of graphene sheets and the desirable structural features of VO2 center dot 0.2H(2)O nanocuboids, the VOG electrode has excellent electronic and ionic transport ability, resulting in superior Zn ions storage performance. The Zn/VOG system delivers ultrahigh specific capacity of 423 mAh.g(-1) at 0.25 A.g(-1) and exhibits good cycling stability of up to 1,000 cycles at 8 A.g(-1) with 87% capacity retention. Systematical structural and elemental characterizations confirm that the interlayer space of VO2 center dot 0.2H(2)O nanocuboids can adapt to the reversible Zn ions insertion/extraction. The as-prepared VOG composite is a promising cathode material with remarkable electrochemical performance for low-cost and safe aqueous rechargeable ZIBs.
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