| 초록 |
Gel polymer electrolytes (GPEs) have been intensively researched due to their good electrochemical and mechanical stabilities, compared to liquid electrolytes showing safety issues. Here, we prepared lithium-ion conducting GPEs via dual cross-linking of lithium acrylate (LiA), vinyl silica nanoparticle (VSN), and lithium alginate (LiAlg). PLiA-VSN-LiAlg hydrogel has high stretchability, flexibility, and good self-recovery ability. The introduction of VSN into GPE achieved high room temperature ionic conductivity of ~10-2 S/cm. Furthermore, the addition of LiAlg enhanced the GPE mechanical property due to physical cross-linking between LiAlg and LiA chains, thereby showing high storage modulus of G’ ~105 Pa. Consequently, we fabricated flexible supercapacitors based on the as-prepared GPE. This VSN-containing GPE-based supercapacitor showed higher capacitance than the VSN-free GPE-based supercapacitor. |
