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Exploiting nonaqueous self-stratified electrolyte systems toward large-scale energy storage

Author

Listed:
  • Zhenkang Wang

    (Soochow University)

  • Haoqing Ji

    (Soochow University)

  • Jinqiu Zhou

    (Nantong University)

  • Yiwei Zheng

    (Soochow University)

  • Jie Liu

    (Nantong University)

  • Tao Qian

    (Nantong University
    Light Industry Institute of Electrochemical Power Sources)

  • Chenglin Yan

    (Soochow University
    Light Industry Institute of Electrochemical Power Sources)

Abstract

Biphasic self-stratified batteries (BSBs) provide a new direction in battery philosophy for large-scale energy storage, which successfully reduces the cost and simplifies the architecture of redox flow batteries. However, current aqueous BSBs have intrinsic limits on the selection range of electrode materials and energy density due to the narrow electrochemical window of water. Thus, herein, we develop nonaqueous BSBs based on Li-S chemistry, which deliver an almost quadruple increase in energy density of 88.5 Wh L−1 as compared with the existing aqueous BSBs systems. In situ spectral characterization and molecular dynamics simulations jointly elucidate that while ensuring the mass transfer of Li+, the positive redox species are strictly confined to the bottom-phase electrolyte. This proof-of-concept of Li-S BSBs pushes the energy densities of BSBs and provides an idea to realize massive-scale energy storage with large capacitance.

Suggested Citation

  • Zhenkang Wang & Haoqing Ji & Jinqiu Zhou & Yiwei Zheng & Jie Liu & Tao Qian & Chenglin Yan, 2023. "Exploiting nonaqueous self-stratified electrolyte systems toward large-scale energy storage," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-37995-8
    DOI: 10.1038/s41467-023-37995-8
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    References listed on IDEAS

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