A new supramolecular binder strongly enhancing electrochemistry performance for lithium-sulfur battery

As one of the indispensable components in the lithium-sulfur battery, the binders greatly impact battery performance. Herein, we report a new multifunctional supramolecular eutectic liquid (SEL) binder, consisting of diphenylamine (DP) and benzophenone (BP), which enables strongly improved conductive network and anchored polysulfides for high-performance lithium-sulfur batteries. Compared with traditional polyvinylidene fluoride (PVDF) binder, SEL binder demonstrates remarkable improvement on both the mechanical performance and the capacity retention (83 % over 200 cycles at 1 C).