One‐Pot Synthesis of a Copolymer Micelle Crosslinked Binder with Multiple Lithium‐Ion Diffusion Pathways for Lithium–Sulfur Batteries

Abstract

Fast lithium‐ion diffusion is very important to obtain high capacity and excellent cycling stability of lithium–sulfur batteries. In this study, a copolymer micelle crosslinked binder (FNA) for lithium–sulfur batteries was successfully synthesized through a one‐pot environmentally friendly approach. The micelles were used as crosslinkers and carriers for the electrolyte. The FNA binder provided multiple lithium‐ion diffusion pathways to increase the lithium‐ion diffusion, which reduced the polarization of the sulfur cathode during the cycling process. The lithium‐ion diffusion pathways of the FNA were provided by the electrolyte hosted in the micelles, the polyethylene oxide and polypropylene oxide segments, and the carboxylate and sulfonate groups in the FNA. In addition, FNA possesses strong lithium polysulfides adsorption and high adhesion properties. Therefore, the electrode with the FNA binder presented a reversible capacity of 571 mAh g−1 with a capacity fade of 0.032 % after 1000 cycles at a cycling rate of 0.5 C, which is much higher than those of the polyvinylidene fluoride (PVDF) sulfur cathode.

Biomass-Derived 3D Interconnected Porous Carbon-Encapsulated Nano-FeS2 for High-Performance Lithium-Ion Batteries

“…Furthermore, in contrast to FeS 2 /C, the FT-IR test shows that there are abundant organic functional groups on FeS 2 /LRSC, including hydroxyl and carbonyl, which are favorable to the stabilization of FeS 2 particles (Figure S9). , …”

“…35 Furthermore, in contrast to FeS 2 /C, the FT-IR test shows that there are abundant organic functional groups on FeS 2 / LRSC, including hydroxyl and carbonyl, which are favorable to the stabilization of FeS 2 particles (Figure S9). 36,37 The electrochemical performance of the as-prepared FeS 2 / LRSC and FeS 2 /C composites and pristine FeS 2 was studied through the galvanostatic discharge/charge cycling test. Figure 4a shows the cycling performance of the samples tested between 1.0 and 3.0 V at the current density of 0.5 A g −1 .…”

Environmentally Friendly Binders for Lithium‐Sulfur Batteries

“…Therefore, P‐AB@S is under the necessity of LA132 as auxiliary binder to prepare sulfur cathodes. Guo et al . prepared a micelle‐based crosslinked binder (FNA) with Pluronic F127, a triblock copolymer (PEO 99 −PPO 65 −PEO 99 ) as crosslinker (Figure e).…”

Application of Guar Gum and its Derivatives as Green Binder/Separator for Advanced Lithium‐Ion Batteries

“…Furthermore, synthetic and natural compound-based binders have also been incorporated with the electrodes. [37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55] The binders are essential component for the fabrication of LIBs. The passive binders generally improve inter-connectivity within the electrodes (active material, current collector, conductivity enhancer) and, also facilitates ionic conductivity.…”

“…To overcome these challenges, several strategies have been investigated for example novel architechture of electrodes, functional separator, nano‐scale active materials. Furthermore, synthetic and natural compound‐based binders have also been incorporated with the electrodes [37–55] …”