Synthesis and Characterizations of PVCA-co-P(PEGMA) Solid Polymer Electrolytes

• Main Authors: Ya-Ching Chuang, 莊雅晴
• Other Authors: Jyh-Tsung Lee
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/74579426384141580842

碩士 === 國立中山大學 === 化學系研究所 === 101 === PVCA-co-P(PEGMA) block copolymers were synthesize by free- radical polymerization using vinylene carbonate (VC) and poly(ethylene glycol)methyl ether methacrylate (PEGMA) as monomers. The block copolymers were doped with lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) to form solid polymer electrolytes. Fourier transform infrared spectroscopy (FT-IR), 7Li magic angle spinning NMR (7Li MAS NMR), differential scanning calorimetry (DSC), thermogravimetric analyzer (TGA) and scanning electron microscope (SEM) showed the interaction of Li+ with both the carbonyl group of PVCA and the ether group of P(PEGMA) segments. The glass transition temperatures increased for the block copolymers doped with LiTFSI, and these results indicated the interaction of Li+ with both the carbonyl group of PVCA and the ether group of P(PEGMA) segments form transient cross-linking. Moreover, the thermal stability and compatibility between the polymer segments were good for the polymer electrolytes. The conductivity (log σ) versus reciprocal temperature (1/T) plot was linear which indicated the conduction mechanism following Arrhenius equation and Li+ transport via a activated hopping mechanism.