In large-scale energy storage applications,aqueous zinc ion batteries(ZIBs)with low cost,safety,high theoretical capacity,and environmentally friendly nature have wide application prospects.In the reported cathode mat...In large-scale energy storage applications,aqueous zinc ion batteries(ZIBs)with low cost,safety,high theoretical capacity,and environmentally friendly nature have wide application prospects.In the reported cathode materials,the mass loading of cathodes is generally less than 3 mg cm-2,which makes it hard to meet the requirements of industrial production.To fabricate high-loading ZIB cathodes,a copper ionintercalated hydrated vanadium dioxide on carbon cloth(Cu_(0.18)V_(2)O_(5)·0.72H_(2)O@CC)without a binder was developed.The cathode has a unique three-dimensional interconnected nest structure with high loading(∼7 mg cm-2),high capacity(223.4 mA h g^(-1) at 1 A g^(-1) current density),and long cycle performance over 2000 cycles.Compared with the VOH@CC cathode,Cu2+intercalation makes the VOH cathode have a better capacitance response and faster diffusion rate,which means better rate performance and cycling stability and provides a feasible design scheme for the production of industrial-grade ZIBs.展开更多
基金supported by the National Natural Science Foundation of China(No.61761047 and 41876055)Yunnan University’s Research Innovation Fund for Graduate Students(2021Y339)the Program for Innovative Research Team(in Science and Technology)in the University of Yunnan Province.
文摘In large-scale energy storage applications,aqueous zinc ion batteries(ZIBs)with low cost,safety,high theoretical capacity,and environmentally friendly nature have wide application prospects.In the reported cathode materials,the mass loading of cathodes is generally less than 3 mg cm-2,which makes it hard to meet the requirements of industrial production.To fabricate high-loading ZIB cathodes,a copper ionintercalated hydrated vanadium dioxide on carbon cloth(Cu_(0.18)V_(2)O_(5)·0.72H_(2)O@CC)without a binder was developed.The cathode has a unique three-dimensional interconnected nest structure with high loading(∼7 mg cm-2),high capacity(223.4 mA h g^(-1) at 1 A g^(-1) current density),and long cycle performance over 2000 cycles.Compared with the VOH@CC cathode,Cu2+intercalation makes the VOH cathode have a better capacitance response and faster diffusion rate,which means better rate performance and cycling stability and provides a feasible design scheme for the production of industrial-grade ZIBs.
