Hencz Luke, Chen Hao, Ling Han Yeu, Wang Yazhou, Lai Chao, Zhao Huijun, Zhang Shanqing
Centre for Clean Environment and Energy, Environmental Futures Research Institute, School of Environment and Science, Griffith University, Gold Coast Campus, Gold Coast, QLD, 4222, Australia.
Nanomicro Lett. 2019 Feb 27;11(1):17. doi: 10.1007/s40820-019-0249-1.
Extensive efforts have been devoted to the design of micro-, nano-, and/or molecular structures of sulfur hosts to address the challenges of lithium-sulfur (Li-S) batteries, yet comparatively little research has been carried out on the binders in Li-S batteries. Herein, we systematically review the polymer composite frameworks that confine the sulfur within the sulfur electrode, taking the roles of sulfur hosts and functions of binders into consideration. In particular, we investigate the binding mechanism between the binder and sulfur host (such as mechanical interlocking and interfacial interactions), the chemical interactions between the polymer binder and sulfur (such as covalent bonding, electrostatic bonding, etc.), as well as the beneficial functions that polymer binders can impart on Li-S cathodes, such as conductive binders, electrolyte intake, adhesion strength etc. This work could provide a more comprehensive strategy in designing sulfur electrodes for long-life, large-capacity and high-rate Li-S battery.
人们为设计硫宿主的微结构、纳米结构和/或分子结构付出了巨大努力，以应对锂硫（Li-S）电池的挑战，但对Li-S电池中的粘结剂开展的研究相对较少。在此，我们系统地综述了将硫限制在硫电极内的聚合物复合框架，同时考虑了硫宿主的作用和粘结剂的功能。特别是，我们研究了粘结剂与硫宿主之间的结合机制（如机械互锁和界面相互作用）、聚合物粘结剂与硫之间的化学相互作用（如共价键、静电键等），以及聚合物粘结剂可赋予Li-S正极的有益功能，如导电粘结剂、电解液吸收、粘附强度等。这项工作可为设计长寿命、大容量和高倍率Li-S电池的硫电极提供更全面的策略。
