| 초록 |
Conventional hydrophobic binders (e.g., PvdF, Nafion) used in seawater batteries can cause various problems such as unstable charge-discharge reaction and low performance due to low wettability toward seawater. The hydrophilic adhesive polymer binder is achieved via using three moieties; (i) dopamine methacrylamide (DMA) as an adhesive moiety, (ii) Poly(ethylene glycol) (PEG) as a hydrophilic moiety, and (iii) Poly(ethylene glycol) diacrylate (PEGDA) to prevent polymer binder from dissolving into seawater. The synthesized polymer showed outstanding adhesion against carbon felt and Pt surface, which was also confirmed by molecular dynamics simulation. Moreover, the seawater battery with the polymer binder showed higher power and cycle stability compared to that of PvdF binder. The cross-section of carbon felt was imaged with TEM, which directly showed that the synthesized polymer binder prevents Pt/C from detachment during the charge-discharge cycle. |
