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Elemental Selenium for Electrochemical Energy Storage.

Chun-Peng Yang1,2, Ya-Xia Yin1, Yu-Guo Guo1

  • 1†CAS Key Laboratory of Molecular Nanostructure and Nanotechnology and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, People's Republic of China.

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|August 12, 2015
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Elemental selenium (Se) shows promise for high-energy-density electrochemical energy storage, offering advantages over sulfur (S). This review explores advanced selenium electrode materials and challenges for lithium-selenium batteries.

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Area of Science:

  • Electrochemistry and Materials Science
  • Advanced energy storage materials

Background:

  • Increasing demand for high energy density electrochemical storage.
  • Elemental selenium (Se) as a promising alternative to sulfur (S) due to similar volumetric capacity.
  • Unique properties of Se: semiconductivity, carbonate electrolyte compatibility, and sodium (Na) anode activity.

Purpose of the Study:

  • To review recent advances in Se-based electrode materials for rechargeable batteries.
  • To analyze the challenges associated with lithium-selenium (Li-Se) batteries in different electrolytes.
  • To discuss design strategies for future Se-based energy storage systems.

Main Methods:

  • Literature review of Se-based energy storage materials.
  • Analysis of Se properties in comparison to S.
  • Examination of Li-Se battery performance in carbonate and ether-based electrolytes.

Main Results:

  • Development of advanced Se-based electrode materials for Li, Na, and Li-ion batteries.
  • Identification of challenges in Li-Se battery technology, particularly concerning electrolyte stability and cycling performance.
  • Highlighting the potential of Se due to its unique electrochemical and physical characteristics.

Conclusions:

  • Selenium presents a viable and attractive option for next-generation high-energy-density batteries.
  • Further research is needed to overcome the challenges in Li-Se battery electrolytes and material design.
  • Strategic material design, leveraging Se's strengths, is crucial for advancing Se-based energy storage.