锂硫电池功能化粘合剂研究进展

Review on Advanced Multifunctional Binders for Lithium-Sulfur Batter-ies

摘要:

随着可持续能源的发展和电子设备及电动汽车对储能设备性能要求的不断提高，高能量密度的锂硫电池体系受到了广泛关注。当前锂硫电池仍然面临单质硫和其放电产物的电子绝缘性、多硫化物的“穿梭效应”和循环过程中体积形貌的变化等科学与技术问题，阻碍其实际应用。针对锂硫电池的上述瓶颈，设计多功能粘合剂有望提升活性材料的利用效率及循环寿命。本文在近年来研究的基础上综述了锂硫电池中粘合剂的研究进展，具有包括面向抑制副反应的粘合剂、面向稳定电极片的多维度粘结的粘合剂和面向低界面电阻的粘合剂，并展望了锂硫电池多功能粘合剂面临的科学挑战和未来发展的机遇。

Abstract:

As the demand to energy storage devices for renewable energy, portable electronics and electric vehicles increase, lithium-sulfur (Li-S) batteries have attracted much attention for its extremely high energy density. However, the scientific and technical problems such as low electrical conductivity of elemental sulfur and its discharge products, the polysulfides shuttled between the cathode and anode electrodes, large volume change of sulfur particles during charge and discharge, hinder the demonstration of practical Li-S cells. The advanced multifunctional binder system have been proposed and verified to retard the shuttle of polysulfides and extend the cycling life of a Li-S cell. In this review, the progress on multifunctional bind-ers for lithium sulfur batteries are summarized, including multifunctional binder inhibiting polysulfide shut-tles, binder with multidimensional bonding stabilizing the entire electrode and binder with low interfacial resistance. New insights into challenge and opportunities of multifunctional binder system are also pro-spected.