Synthesis and Characterization of Nitroxyl Polyradical P(TMA-co-PEGMA) and It’s Electrochemical Properties.

• Main Authors: Chien-Mei Huang, 黃茜楣
• Other Authors: Jyh-Tsung Lee
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/12601390598598798161

碩士 === 國立中山大學 === 化學系研究所 === 104 === In this thesis, a series of copolymers, poly[2,2,6,6-tetramethyl-1-piperidinyloxy-4-yl-methacrylate-co-poly(ethylene glycol)methacrylate] [P(TMA-co-PEGMA)], has been synthesized by radical polymerization. The electrochemical properties and cell performance of organic radical batteries of the P(TMA-co-PEGMA) are also studied. 2,2,6,6-Tetramethyl-4-piperidyl methacrylate (TMPM) and poly(ethylene glycol) methacrylate (PEGMA) are polymerized using 2,2''-azo bis(2-methylpropionitrile) (AIBN) as an initiator to yield P(TMPM-co-PEGMA). P(TMPM-co-PEGMA) was oxidized by 3-chloroperoxybenzoic acid (mCPBA) to give P(TMA-co-PEGMA). The spectroscopies of nuclear magnetic resonance (NMR) and infrared (IR) confirm the successful synthesis of the copolymers. The glass transition temperature (Tg) of the copolymers is controlled by varying the ratio of PEGMA and PTMA. The molecular weight of copolymers is from 10,000 to 40,000, depending on the ratio of PEGMA and PTMA. The discharge capacity of organic radical batteries with P(TMA-co-PEGMA) as the anode-active material is 90 mAh g-1. Interestingly, P(TMA-co-PEGMA) also can be used as a binder for the LiFePO4 electrode in lithium-ion batteries, which enhances the discharge capacity of the cell.