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Rational Designs for Lithium-Sulfur Batteries with Low Electrolyte/Sulfur Ratio

机译：电解质/硫比锂 - 硫电池的合理设计

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摘要

Lithium-sulfur batteries (LSBs) are considered a promising next-generation energy storage device owing to their high theoretical energy density. However, their overall performance is limited by several critical issues such as lithium polysulfide (PS) shuttles, low sulfur utilization, and unstable Li metal anodes. Despite recent huge progress, the electrolyte/sulfur ratio (E/S) used is usually very high (= 20 mu L mg(-1)), which greatly reduces the practical energy density of devices. To push forward LSBs from the lab to the industry, considerable attention is devoted to reducing E/S while ensuring the electrochemical performance. To date, however, few reviews have comprehensively elucidated the possible strategies to achieve that purpose. In this review, recent advances in low E/S cathodes and anodes based on the issues resulting from low E/S and the corresponding solutions are summarized. These will be beneficial for a systematic understanding of the rational design ideas and research trends of low E/S LSBs. In particular, three strategies are proposed for cathodes: preventing PS formation/aggregation to avoid inadequate dissolution, designing multifunctional macroporous networks to address incomplete infiltration, and utilizing an imprison strategy to relieve the adsorption dependence on specific surface area. Finally, the challenges and future prospects for low E/S LSBs are discussed.
机译：由于其高理论能量密度，锂 - 硫电池（LSB）被认为是一个承诺的下一代能量存储装置。然而，它们的整体性能受到多个关键问题的限制，例如锂多硫化锂（PS）梭，低硫利用率和不稳定的Li金属阳极。尽管近来的进展越大，所用的电解质/硫比（E / S）通常非常高（> =20μLmg（-1）），这极大地降低了器件的实用能量密度。为了从实验室推送LSB到行业，致力于在确保电化学性能的同时降低E / S的相当大。然而，迄今为止，很少有评论全面阐明实现这种目的的可能策略。在本文中，总结了基于E / S低产生和相应解决方案产生的问题的低E / S阴极和阳极的最新进展。这些将有利于系统理解低E / S LSB的理性设计思路和研究趋势。特别地，提出了三种策略用于阴极：防止PS形成/聚集以避免不充分的溶解，设计多功能大孔网络以解决不完全渗透，并利用监禁策略来缓解对特定表面积的吸附依赖性。最后，讨论了低E / S LSB的挑战和未来前景。

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  • 来源
    《Advanced Functional Materials》 |2021年第18期|2010499.1-2010499.31|共31页
  • 作者

    Guo Junling; Pei Huayu; Dou Ying; Zhao Siyuan; Shao Guosheng; Liu Jinping;

  • 作者单位

    Zhengzhou Univ Sch Mat Sci & Engn Country State Ctr Int Cooperat Designer Low Carbo 100 Kexue Ave Zhengzhou 450001 Peoples R China;

    Zhengzhou Univ Sch Mat Sci & Engn Country State Ctr Int Cooperat Designer Low Carbo 100 Kexue Ave Zhengzhou 450001 Peoples R China;

    Zhengzhou Univ Sch Mat Sci & Engn Country State Ctr Int Cooperat Designer Low Carbo 100 Kexue Ave Zhengzhou 450001 Peoples R China;

    Zhengzhou Univ Sch Mat Sci & Engn Country State Ctr Int Cooperat Designer Low Carbo 100 Kexue Ave Zhengzhou 450001 Peoples R China;

    Zhengzhou Univ Sch Mat Sci & Engn Country State Ctr Int Cooperat Designer Low Carbo 100 Kexue Ave Zhengzhou 450001 Peoples R China;

    Wuhan Univ Technol Sch Chem Chem Engn & Life Sci State Key Lab Adv Technol Mat Synth & Proc Wuhan 430070 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    electrolyte degradation; lithium dendrites; lithium#8208; sulfur batteries; low electrolyte; sulfur ratio; polysulfide dissolution;

    机译：电解质降解;锂枝晶;锂 - 硫磺电池;低电解质;硫比;多硫化物溶解;

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