Catecholic polymer binders for enhancing battery performance
발표자
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초록
내용
Traditional battery binders can cause various problems such as an unstable charge-discharge reaction and low performance due to low wettability toward aqueous electrolyte and/or poor underwater adhesion against current collectors and catalysts. Therefore, developing a new type of polymer binder is necessary. A mussel-inspired hydrophilic polymer binder is developed by copolymerizing three different monomers; (i) dopamine methacrylamide (DMA) as an adhesive moiety, (ii) Poly(ethylene glycol) (PEG) as a hydrophilic and ion-conducting moiety, and (iii) Poly(ethylene glycol) diacrylate (PEGDA) as a cross-linker to prevent polymer binder from dissolution. The synthesized DMA-PEG-Acrylate (DPA) polymer is used as a binder for (i) the cathode of sodium-air batteries (SABs) and (ii) the anode of lithium-ion batteries (LIBs), and effectively enhanced overall performance (e.g., reduced overpotential, enhanced cycle stability) of the batteries.