Zhao Meng, Li Bo-Quan, Zhang Xue-Qiang, Huang Jia-Qi, Zhang Qiang
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.
Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China.
ACS Cent Sci. 2020 Jul 22;6(7):1095-1104. doi: 10.1021/acscentsci.0c00449. Epub 2020 Jun 29.
Lithium-sulfur (Li-S) batteries have long been expected to be a promising high-energy-density secondary battery system since their first prototype in the 1960s. During the past decade, great progress has been achieved in promoting the performances of Li-S batteries by addressing the challenges at the laboratory-level model systems. With growing attention paid to the application of Li-S batteries, new challenges at practical cell scales emerge as the bottleneck. In this Outlook, the key parameters for practical Li-S batteries to achieve practical high energy density are emphasized regarding high-sulfur-loading cathodes, lean electrolytes, and limited excess anodes. Subsequently, the key scientific problems are redefined in practical Li-S batteries beyond the previous ones under ideal conditions. Finally, viable strategies are proposed to address the above challenges as future research directions.
自20世纪60年代首次出现原型以来，锂硫（Li-S）电池长期以来一直被认为是一种很有前景的高能量密度二次电池系统。在过去十年中，通过解决实验室级模型系统中的挑战，锂硫电池的性能取得了巨大进展。随着对锂硫电池应用的关注度不断提高，实际电池规模下的新挑战成为瓶颈。在本展望中，强调了实际锂硫电池实现实际高能量密度的关键参数，涉及高硫负载阴极、贫电解质和有限的过量阳极。随后，重新定义了实际锂硫电池中超出理想条件下先前问题的关键科学问题。最后，提出了可行的策略来应对上述挑战，作为未来的研究方向。
