期刊
NANO ENERGY
卷 61, 期 -, 页码 617-625出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2019.05.005
关键词
Aqueous zinc-ion battery; Vanadium pentoxide; Transition metal ion; Cycling performance; Energy storage mechanism
类别
资金
- National Natural Science Foundation of China [51802356, 51872334, 51572299]
- Innovation-Driven Project of Central South University [2018CX004]
Rechargeable aqueous zinc-ion batteries (ZIBs) with advantages of high safety and low-cost gradually show potential in large-scale energy storage/supply application. Yet the further development of aqueous ZIBs is hindered by finding suitable cathodes. Here we demonstrate that the chemical pre-intercalated transition metal ions (e.g. Fe2+, Co2+, Ni2+, Mn2+, Zn2+ and Cu2+, etc.) into the interlayer of V2O5, could effectively improve the electrochemical performance of aqueous ZIBs, in terms of high capacity, rate capability and long-term cycling stability, as well as excellent broad temperature adaptability. For instance, Cu2+-intercalated V2O5 cathode exhibits high capacity of 180 mA h g(-1) after 10000 cycles at 10 A g(-1) and 122 mA h g(-1) after 3000 cycles at 20 A g(-1). This universal strategy of pre-intercalated metal ions in the host materials is found to enable fast Zn2+ diffusion, enhanced electrical conductivity, and excellent structural reversibility, which can be applicable for other well-established aqueous ZIBs cathodes (i.e. MnO2), or other advanced battery systems.
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