气凝胶
石墨烯
水溶液
阴极
材料科学
电池(电)
化学工程
电流密度
化学
纳米技术
电气工程
物理化学
量子力学
物理
功率(物理)
工程类
作者
Yongsheng Xiang,Fuyu Chen,Bin Tang,Minquan Zhou,Xinlu Li,Ronghua Wang
标识
DOI:10.1016/j.jcis.2024.03.096
摘要
Aqueous zinc-ion batteries (ZIBs) have attracted more and more attention due to their advantages of low cost, high safety and environmental protection. Unfortunately, the unsatisfactory capacity at high current density and long-term cycling performance of cathode materials hinder the development of ZIBs. Here, a novel Zn0.079V2O5·0.53H2O/graphene (ZVOH@rGO) hybrid aerogel composed of ultrathin Zn0.079V2O5·0.53H2O (ZVOH) nanoribbons and 3D continuous graphene conductive network was successfully prepared and used as cathode of ZIBs. Taking advantage of the synergistic effects associated with ion doping, morphology control and unique aerogel structure, the ZVOH@rGO electrode demonstrated ultrafast charge/discharge capability and remarkable cycling stability: A high reversible capacity of 286.7 mAh/g was achieved at a current density as large as 30 A/g, and an impressive capacity retention ratio of 75.6 % was realized over 9800 ultra-long cycles at 12 A/g. This work is of great significance for the synthesis modification of vanadium oxides and the development of high performance ultrafast charge–discharge ZIBs.
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