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首页> 外文期刊>Advanced Functional Materials >3D Carbonaceous Current Collectors: The Origin of Enhanced Cycling Stability for High-Sulfur-Loading Lithium-Sulfur Batteries
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3D Carbonaceous Current Collectors: The Origin of Enhanced Cycling Stability for High-Sulfur-Loading Lithium-Sulfur Batteries

机译：3D碳质集电器：高硫负载锂硫电池增强循环稳定性的起源

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摘要

The cycling stability of high-sulfur-loading lithium-sulfur (Li-S) batteries remains a great challenge owing to the exaggerated shuttle problem and interface instability. Despite enormous efforts on design of advanced electrodes and electrolytes, the stability issue raised from current collectors has been rarely concerned. This study demonstrates that rationally designing a 3D carbonaceous macroporous current collector is an efficient and effective "two-in-one" strategy to improve the cycling stability of high-sulfur-loading Li-S batteries, which is highly versatile to enable various composite cathodes with sulfur loading >3.7 mAh cm(-2). The best cycling performance can be achieved upon 950 cycles with a very low decay rate of 0.029%. Moreover, the origin of such a huge enhancement in cycling stability is ascribed to (1) the inhibition of electrochemical corrosion, which severely occurs on the typical Al foil and disables its long-term sustainability for charge transfer, and (2) the passivation of cathode surface. The role of the chemical resistivity against corrosion and favorable macroscopic porous structure is highlighted for exploiting novel current collectors toward exceptional cycling stability of high-sulfur-loading Li-S batteries.
机译：由于存在过大的穿梭问题和界面不稳定性，高硫载锂硫（Li-S）电池的循环稳定性仍然是一个巨大的挑战。尽管在高级电极和电解质的设计上付出了巨大的努力，但集电器引起的稳定性问题却很少受到关注。这项研究表明，合理设计3D碳质大孔集电器是一种有效且有效的“二合一”策略，可改善高硫负载Li-S电池的循环稳定性，该电池具有很高的通用性，可实现各种复合阴极硫负载> 3.7 mAh cm（-2）。 950次循环可实现最佳的循环性能，而衰减率仅为0.029％，非常低。此外，循环稳定性如此大幅度提高的原因归因于：（1）抑制电化学腐蚀，这种腐蚀严重发生在典型的Al箔上，并且不能长期保持电荷转移的可持续性，以及（2）钝化阴极表面。耐腐蚀和良好的宏观多孔结构的耐化学性的作用在开发新型集电器以实现高硫负载Li-S电池优异的循环稳定性方面得到了强调。

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  • 来源
    《Advanced Functional Materials》 |2016年第35期|6351-6358|共8页
  • 作者

    Peng Hong-Jie; Xu Wen-Tao; Zhu Lin; Wang Dai-Wei; Huang Jia-Qi; Cheng Xin-Bing; Yuan Zhe; Wei Fei; Zhang Qiang;

  • 作者单位

    Tsinghua Univ, Dept Chem Engn, Beijing Key Lab Green Chem React Engn & Technol, Beijing 100084, Peoples R China;

    Tsinghua Univ, Dept Chem Engn, Beijing Key Lab Green Chem React Engn & Technol, Beijing 100084, Peoples R China;

    Tsinghua Univ, Dept Chem Engn, Beijing Key Lab Green Chem React Engn & Technol, Beijing 100084, Peoples R China;

    Tsinghua Univ, Dept Chem Engn, Beijing Key Lab Green Chem React Engn & Technol, Beijing 100084, Peoples R China;

    Tsinghua Univ, Dept Chem Engn, Beijing Key Lab Green Chem React Engn & Technol, Beijing 100084, Peoples R China;

    Tsinghua Univ, Dept Chem Engn, Beijing Key Lab Green Chem React Engn & Technol, Beijing 100084, Peoples R China;

    Tsinghua Univ, Dept Chem Engn, Beijing Key Lab Green Chem React Engn & Technol, Beijing 100084, Peoples R China;

    Tsinghua Univ, Dept Chem Engn, Beijing Key Lab Green Chem React Engn & Technol, Beijing 100084, Peoples R China;

    Tsinghua Univ, Dept Chem Engn, Beijing Key Lab Green Chem React Engn & Technol, Beijing 100084, Peoples R China;

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