• 文献标题:   H2V3O8 Nanowire/Graphene Electrodes for Aqueous Rechargeable Zinc Ion Batteries with High Rate Capability and Large Capacity
  • 文献类型:   Article
  • 作  者:   PANG Q, SUN CL, YU YH, ZHAO KN, ZHANG ZY, VOYLES PM, CHEN G, WEI YJ, WANG XD
  • 作者关键词:   aqueous rechargeable zinc ion batterie, cathode material, energy storage, graphene composite, h2v3o8 nanowire
  • 出版物名称:   ADVANCED ENERGY MATERIALS
  • ISSN:   1614-6832 EI 1614-6840
  • 通讯作者地址:   Univ Wisconsin
  • 被引频次:   63
  • DOI:   10.1002/aenm.201800144
  • 出版年:   2018

▎ 摘  要

Aqueous rechargeable zinc ion batteries are considered a promising candidate for large-scale energy storage owing to their low cost and high safety nature. A composite material comprised of H2V3O8 nanowires (NWs) wrapped by graphene sheets and used as the cathode material for aqueous rechargeable zinc ion batteries is developed. Owing to the synergistic merits of desirable structural features of H2V3O8 NWs and high conductivity of the graphene network, the H2V3O8 NW/graphene composite exhibits superior zinc ion storage performance including high capacity of 394 mA h g(-1) at 1/3 C, high rate capability of 270 mA h g(-1) at 20 C and excellent cycling stability of up to 2000 cycles with a capacity retention of 87%. The battery offers a high energy density of 168 W h kg(-1) at 1/3 C and a high power density of 2215 W kg(-1) at 20 C (calculated based on the total weight of H2V3O8 NW/graphene composite and the theoretically required amount of Zn). Systematic structural and elemental characterization confirm the reversible Zn2+ and water cointercalation electrochemical reaction mechanism. This work brings a new prospect of designing high-performance aqueous rechargeable zinc ion batteries for grid-scale energy storage.