Solid Polymer Electrolytes Based on Functionalized Tannic Acids from Natural Resources for AllSolidState LithiumIon Batteries
- Solid Polymer Electrolytes Based on Functionalized Tannic Acids from Natural Resources for AllSolidState LithiumIon Batteries
- 심지민; 배기윤; 김희중; 이진홍; 김동균; 윤우영; 이종찬
- Issue Date
- VOL 8, NO 24-4138
- Solid polymer electrolytes (SPEs) for all-solid-state lithium-ion batteries are prepared by simple one-pot polymerization induced by ultraviolet (UV) light using poly(ethylene glycol) methyl ether methacrylate (PEGMA) as an ion-conducting monomeric unit and tannic acid (TA)-based crosslinking agent and plasticizer. The crosslinking agent and plasticizer based on natural resources are obtained from the reaction of TA with glycidyl methacrylate and glycidyl poly(ethylene glycol), respectively. Dimensionally stable free-standing SPE having a large ionic conductivity of 5.6 x 10(-4) S cm(-1) at room temperature can be obtained by the polymerization of PEGMA into P(PEGMA) with a very small amount (0.1 wt%) of the crosslinking agent and 2.0 wt% of the plasticizer. The ionic conductivity value of SPE with a crosslinked structure is one order of magnitude larger than that of linear P(PEGMA) in the waxy state.
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