Block copolymer binders with hard and soft segments for scalable fabrication of sulfide‐based all‐solid‐state batteries

Abstract

Sulfide‐based all‐solid‐state batteries (ASSBs) have attracted much attention owing to their superior safety and potentially high‐energy density. Nevertheless, sulfide‐based ASSBs suffer from limited performance in terms of their cycle life and rate capability, which is closely related to interfacial degradation during cycling. Another weakness is the absence of manufacturing protocols. Having noted that the binder can play a pivotal role in both the cell performance and scale‐up, here, we report poly(1,2‐butadiene)‐b‐poly(methyl methacrylate) (PBD‐b‐PMMA) block copolymers as the binders. At the optimal ratio, the soft PBD segments and hard PMMA segments work synergistically to strengthen adhesion among particles in the electrode and introduce elasticity in the binder network, enabling the key battery performance indicators to be improved markedly. The systematic study also reveals the importance of the microscopic distributions of these two segments. This study signifies the appropriate combination of adhesion and elasticity in designing binders for sulfide‐based ASSBs.

Reshaping the material research paradigm of electrochemical energy storage and conversion by machine learning

“…[91][92][93][94] SSEs exhibit less flammability and high safety, but their applications are still limited by their low ionic conductivity, thus accelerating the constituent optimization process of SSEs is in crunch time. [95][96][97] Jalem and co-workers used the ANN + DFT method to probe Li migration energy in olivine-type LiM X O 4 SSEs (M-main group elements, X-group XIV, and group XV). 98 4A).…”

A Highly Damping, Crack‐Insensitive and Self‐Healable Binder for Lithium‐Sulfur Battery by Tailoring the Viscoelastic Behavior

“…As the vital component of the sulfur cathode, the most basic function of binder is to mechanically integrate the sulfur, conductive additives and current collector. [ 15–22 ] Recently, more and more functions have been incorporated into binder, such like introducing polar/ionic groups to immobilize the LiPSs, [ 23–31 ] or constructing dynamic interactions to afford self‐healing capacity that enables repairing the cracks. [ 32,33 ] For example, Fu et al.…”

“…functions have been incorporated into binder, such like introducing polar/ionic groups to immobilize the LiPSs, [23][24][25][26][27][28][29][30][31] or constructing dynamic interactions to afford self-healing capacity that enables repairing the cracks. [32,33] For example, Fu et al have proposed a polyzwitterionic binder with pendant ionic groups to anchor the LiPSs, while the interchain hydrogen bonds and electronic interactions provide the potential for crack repair; besides, the zwitterionic groups could form ionic channels to promote the ion transfer.…”

Metal‐organic framework derived porous structures towards lithium rechargeable batteries

“…In addition, other next-generation battery technologies are emerging such as flexible batteries [49][50][51][52][53][54][55][56][57][58][59][60][61][62] that can bend, and sodium-ion [63][64][65][66][67][68][69][70][71][72][73][74] and zinc-air batteries 41, [75][76][77][78][79][80][81][82][83][84][85][86] for price and supply stability. Accordingly, the development direction of the nextgeneration battery will be the mainstream all-solid-state battery [87][88][89][90][91][92][93][94][95][96] along with the improvement and evolution of the performance of each component constituting the battery. In addition, commercialization of LMBs and LSBs will be attempted, and ultimately, the development of LABs, called dream batteries, will proceed.…”