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4 Wh kg-1 at 1800 W kg-1, and specific capacity retention of 97.7% after 3000 cycles. In sum, the as-obtained core-shell nanostructure prepared by the proposed synthesis method is very promising for future development of high-performance supercapacitors.Rechargeable aqueous Zn ion batteries have been regarded as one of the most promising candidates for next-generation energy storage devices due to their low cost, non-toxicity and high safety. However, the dendrite growth of Zn anode and severe undesired side-reactions largely limited