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H2V3O8 Nanowire/Graphene Electrodes for Aqueous Rechargeable Zinc Ion Batteries with High Rate Capability and Large Capacity
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-03-25 , DOI: 10.1002/aenm.201800144 Qiang Pang 1, 2 , Congli Sun 1 , Yanhao Yu 1 , Kangning Zhao 1 , Ziyi Zhang 1 , Paul M. Voyles 1 , Gang Chen 2 , Yingjin Wei 2 , Xudong Wang 1
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2018-03-25 , DOI: 10.1002/aenm.201800144 Qiang Pang 1, 2 , Congli Sun 1 , Yanhao Yu 1 , Kangning Zhao 1 , Ziyi Zhang 1 , Paul M. Voyles 1 , Gang Chen 2 , Yingjin Wei 2 , Xudong Wang 1
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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.
中文翻译：
具有高倍率能力和大容量的H2V3O8纳米线/石墨烯电极，用于水性可充电锌离子电池
水性可充电锌离子电池由于其低成本和高安全性而被认为是大规模储能的有希望的候选者。开发了由H 2 V 3 O 8纳米线（NWs）组成的复合材料，该复合材料由石墨烯片包裹并用作水性可充电锌离子电池的正极材料。由于H 2 V 3 O 8 NW的理想结构特征和石墨烯网络的高电导率的协同作用，H 2 V 3 O 8 NW /石墨烯复合材料具有出色的锌离子存储性能，包括394 mA hg-的高容量- 1个在1/3 C下，在20 C下具有270 mA hg -1的高倍率能力，并具有高达2000个循环的出色循环稳定性，容量保持率为87％。该电池在1/3 C下提供168 W h kg -1的高能量密度，在20 C下提供2215 W kg -1的高功率密度（基于H 2 V 3 O 8 NW /石墨烯的总重量计算）复合材料和理论上需要的Zn量）。系统的结构和元素表征证实了可逆的Zn 2+和水共嵌入电化学反应机理。这项工作为设计用于电网规模储能的高性能水性可充电锌离子电池带来了新的前景。
更新日期：2018-03-25
中文翻译：
具有高倍率能力和大容量的H2V3O8纳米线/石墨烯电极，用于水性可充电锌离子电池
水性可充电锌离子电池由于其低成本和高安全性而被认为是大规模储能的有希望的候选者。开发了由H 2 V 3 O 8纳米线（NWs）组成的复合材料，该复合材料由石墨烯片包裹并用作水性可充电锌离子电池的正极材料。由于H 2 V 3 O 8 NW的理想结构特征和石墨烯网络的高电导率的协同作用，H 2 V 3 O 8 NW /石墨烯复合材料具有出色的锌离子存储性能，包括394 mA hg-的高容量- 1个在1/3 C下，在20 C下具有270 mA hg -1的高倍率能力，并具有高达2000个循环的出色循环稳定性，容量保持率为87％。该电池在1/3 C下提供168 W h kg -1的高能量密度，在20 C下提供2215 W kg -1的高功率密度（基于H 2 V 3 O 8 NW /石墨烯的总重量计算）复合材料和理论上需要的Zn量）。系统的结构和元素表征证实了可逆的Zn 2+和水共嵌入电化学反应机理。这项工作为设计用于电网规模储能的高性能水性可充电锌离子电池带来了新的前景。
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