Hollow nanostructures are extremely attractive in energy storage and show broad application prospects.But the preparation method is accompanied by a complicated process.In this article,the CoZn-based hol-low nanoboxes with electrochemical synergy are prepared in a simple way.This structure can effectively shorten the transmission distance of ions and electrons,and alleviate the volume expansion during the cycle.In particular,bimetallic oxides are rich in oxygen vacancies,providing more active sites for electro-chemical reactions.In addition,the stepwise oxidation-reduction reaction can also improve the volume change of the electrode material.According to the kinetic analysis and density functional theory(DFT)calculation,it is confirmed that the synergistic effect of the bimetallic oxide can accelerate the reaction kinetics.Based on these characteristics,the electrode exhibits stable cycle performance and long cycle life in alkali metal ion batteries,and can provide reversible capacities of 302.1(LIBs,2000 cycles),172.5(SIBs,10000 cycles)and 109.6(PIBs,5000 cycles)mA h g-1 at a current density of 1.0 A g-1,respectively.In ad-dition,by assembling(LiCoO2//CoZn-O2)and(Na3V2(PO4)3//CoZn-O2)full-cells,the practical application value is demonstrated.The sharing of this work introduces a simple way to synthesize hollow nanoboxes,and shows excellent electrochemical performance,which can also be expanded in other areas.

Zheng Zhang;Ying Huang;Xiang Li;Zhiming Zhou

MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions,School of Natural and Applied Sciences,Northwestern Polytechnical University,Xi'an 710072,China;CAS Key Laboratory of Low-Carbon Conversion Science and Engineering,Shanghai Advanced Research Institute,Chinese Academy of Sciences,100 Haike Road,Shanghai 201210,China

材料科学技术（英文版）

[1]Zheng Zhang;Ying Huang;Xiang Li;Zhiming Zhou-.Rational construction of hollow nanoboxes for long cycle life alkali metal ion batteries)[J].材料科学技术（英文版）,2022(07):46-55

nanoboxes,CoZn

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