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Professor Liang-Ti Qu, founding editor-in-chief of Nano Research Energy (https://www.sciopen.com/journal/2790-8119?issn=2790-8119), Department of Chemistry, Tsinghua University, has made new progress in the field of fast charging of Zn-Se batteries, and the related results were published in Tsinghua University on April 6 In the top international journal Nature Communication.

Selenium (Se) is a promising cathode material, and currently it mainly forms Li/Na/K-Se batteries based on organic electrolytes with alkali metal (Li, Na, K) cathodes. se cathodes in these battery systems are based on 2 electron transfer reactions, and their theoretical specific capacity is 675 mAh-gSe-1. In addition, the multiplicity of these Se-based batteries performance of these Se-based cells is usually poor.

Prof. Liang-Ti Qu's team, together with Prof. Zhipan Zhang from Beijing Institute of Technology and Associate Researcher Feng Liu from Institute of Mechanics, Chinese Academy of Sciences, prepared a series of Se@C cathode materials with Cu2+ as the carrier of the positive electrode and Cu or Zn as the negative electrode, and assembled the cells for electrochemical performance testing. The changes occurring in the Se cathode during charging and discharging were investigated by in situ XRD, non-in situ XRD, non-in situ TEM, and non-in situ XPS characterization techniques. The diffusion coefficient of Cu2+ during charge and discharge was investigated by constant current intermittent titration (GITT).

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