含磺酸基和氮氧自由基共聚合物的合成及性能研究  

Synthesisand properties of copolymer bearing sulfonate and nitroxide radical groups

作　　者：朱军峰[1] 拓欢 朱婷 高薇春 张万斌 ZHU Junfeng;TUO Huan;ZHU Ting;GAO Weichun;ZHANG Wanbin(College of Chemistry and Chemical Engineering, Shaanxi Key Research Laboratory of Chemical Additives,Shaanxi University of Science & Technology, Xi'an 710021, China)

机构地区：[1]陕西科技大学化学与化工学院陕西省轻化工助剂化学与技术重点实验室

出　　处：《功能材料》2020年第3期3096-3101,共6页Journal of Functional Materials

基　　金：陕西省自然科学基础研究计划资助项目(2018JM2023);陕西省教育厅重点实验室科研计划资助项目(18JS014);西安市科技创新引导资助项目(201805023YD1CG7(3))

摘　　要：以4-甲基丙烯酸-2,2,6,6-四甲基哌啶醇酯(TMPM)和苯乙烯磺酸钠(SSS)为原料,通过内自由基聚合合成共聚物,析出产物后再用氧化剂间氯过氧苯甲酸(mCPBA)氧化成氮氧自由基聚合物。采用核磁共振波谱、傅里叶红外光谱、电子顺磁共振、X射线光电子能谱、紫外可见光谱等对聚合物进行了表征和分析,最后确认得到目标产物PTMA-co-PSS;并组装扣式电池分析材料电化学性能,结果表明PTMA-co-PSS作为正极材料,电荷转移电阻为168Ω,首次放电比容量为99.08 mAh/g,首次充电比容量为92.97 mAh/g,经过100次循环后容量稳定在67.50 mAh/g,库伦效率接近100%,具有较低的电荷转移电阻,说明PTMA-co-PSS作为电极活性材料循环可逆性能良好,循环寿命稳定,具有优良的电化学应用前景。The copolymer was synthesized by radical polymerization using 2,2,6,6-tetramethyl-4-piperidyl methacrylate(TMPM)and sodium styrene sulfonate(SSS)as raw materials,and the synthesized copolymer was oxidized to nitroxyl radical polymerization with oxidizing chloroperoxybenzoic acid(mCPBA).The structure of synthesized copolymer was confirmed by NMR(1HNMR),Fourier infrared spectrometer(FT-IR),electron paramagnetic resonance(EPR),X-ray photoelectron spectroscopy(XPS)and UV-visible spectrum(UV-vis).The electrochemical performance was tested by assembling a button cell.The results showed that PTMA-co-PSS was used as the positive electrode material,Rfc was168Ωand the first discharge specific capacity was 99.08 mAh/g.The first charge specific capacity was 92.97 mAh/g.After 100 cycles,the capacity was stable at 67.50 mAh/g and Coulomb efficiency was close to 100%.The low charge transfer resistance indicated that PTMA-co-PSS had good cycle reversibility and stable cycle life,and had excellent electrochemical application prospects as an electrode active material.

关 键 词：氮氧自由基聚合物 磺酸盐 二次电池 电极材料 PTMA 

分 类 号：TQ150[化学工程—电化学工业]