Developing advanced energy devices with long-term operation characteristics has attracted much atten-tion in energy storage and conversion. It proposes new demands for electrode and catalyst materials with structural controllability, electrochemical stability, and intrinsic conductivity. Fortunately, metal sele-nides can meet these requirements, which are the rising star of emerging candidates for energy devices nowadays. This article provides a comprehensive and critical review on the recent state-of-the-art pro-gress of metal selenides for energy storage and conversion. The difference and necessity of each metal selenide are emphasized. The crystal and electronic structures and synthesis and modification methods of metal selenides are summarized to reveal their correlation with the performance of energy storage and conversion devices. The challenges and outlook of metal selenides in energy storage and conversion are also discussed. This review is expected to give us a deep understanding of the structure, methodology, and application of metal selenides in energy storage and conversion, which will certainly facilitate the research on this issue in the near future.(c) 2022 Elsevier B.V. All rights reserved.
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