二甲基二烯丙基氯化铵分子内掺杂氮氧自由基聚合物PTAm研究  

Study on intramolecular doping of nitroxyl radical polymer PTAm with dimethyl diallyl ammonium chloride

作　　者：朱军峰[1] 朱婷 拓欢 高薇春 张万斌 任军哲 ZHU Jun-feng;ZHU Ting;TUO Huan;GAO Wei-chun;ZHANG Wan-bin;REN Jun-zhe(College of Chemistry and Chemical Engineering,Shaanxi Key Laboratory of Chemical Additives for Industry,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：《陕西科技大学学报》2019年第5期72-77,共6页Journal of Shaanxi University of Science & Technology

基　　金：国家自然科学基金项目(21303098);陕西省科技厅自然科学基础研究计划项目(2018JM2023);陕西省教育厅重点实验室开放基金项目(12JS019)

摘　　要：合成出4-丙烯酰胺基-2,2,6,6-四甲基哌啶单体,与二甲基二烯丙基氯化铵通过内掺杂法合成共聚物,在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射线光电子能谱对自由基聚合物进行了表征和分析,最后确认得到目标产物PTAm-co-PDMDAAC.同时,组装扣式电池,通过电化学阻抗和充放电循环测试,结果表明自由基聚合物PTAm-co-PDMDAAC作为正极材料的首次放电比容量高达106.1mAh/g,充电比容量为100.3mAh/g,首次库伦效率为94.6%,经过100次循环之后,PTAm-co-PDMDAAC的充电比容量降到了61mAh/g并趋于稳定,容量保持率为61.8%.这说明其作为电池正极材料具有良好的导电性,较低的电荷转移电阻,充放电循环容量保持率良好,循环寿命稳定.A 4-acrylamido-2,2,6,6-tetramethylpiperidine monomer was synthesized,and a copolymer was synthesized by internal doping with dimethyldiallylammonium chloride.After the product is precipitated,it is oxidized to a nitroxide polymer with an oxidizing agent,chloroperoxybenzoic acid (mCPBA).The free radical polymer was characterized and analyzed by NMR spectrometer,Fourier transform infrared spectroscopy,electron paramagnetic resonance spectrometer and X-ray photoelectron spectroscopy.Finally,the target product PTAm- co -PDMDAAC was confirmed.The results show that the free-radical polymer PTAm- co -PDMDAAC as the positive electrode material has a first discharge specific capacity of 106.1 mAh/g,a charge specific capacity of 100.3 mAh/g,and the first coulombic efficiency of 94.6%.After 100 cycles,PTAm- The charging specific capacity of co-PDMDAAC decreased to 61 mAh/g and stabilized.The capacity retention rate was 61.8%,indicating that it has good conductivity as a battery positive electrode material,has low charge transfer resistance,and maintains charge and discharge cycle capacity.Good rate and stable cycle life.

关 键 词：氮氧自由基 聚合物 掺杂 电极材料 

分 类 号：TQ150[化学工程—电化学工业]