镧离子电化学掺杂聚苯胺薄膜电极及其电容性能
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摘要
采用循环伏安法(CV)制备了聚苯胺(PANI)和掺杂镧离子的聚苯胺(PANI/La~(3+))薄膜电极。利用傅里叶红外光谱、X射线衍射、场发射扫描电镜和X射线能谱仪对其结构和形貌进行了分析。通过循环伏安、恒流充放电(CP)及交流阻抗(EIS)等测试其电化学性能。结果表明,在0.5mol/L H_2SO_4电解液中,当电流密度为5mA/cm~2时,掺杂镧离子的聚苯胺比电容相对聚苯胺薄膜电极提高了100F/g,且镧离子掺杂后的聚苯胺循环稳定性明显改善。
Polyaniline(PANI)films and polyaniline doped with La~(3+)(PANI/La~(3+))films were synthesized by cyclic voltammetry(CV).The effects of La~(3+)concentration on the structure and morphology of PANI films and PANI/La~(3+)films were characterized by FI-IR,XRD,SEM and EDS.And electrochemical performance of PANI films and PANI/La~(3+)films were tested by cyclic voltammetry,galvanostatic charge-discharge test(CP)and electrochemical impedance spectroscopy(EIS).The results suggest that the PANI/La~(3+)films show a larger specific capacitance of 100F/g and better cycle stability,in 0.5mol/L H_2SO_4 electrolyte,at a current density of 5mA/cm,compared with the pure PANI film.
Polyaniline(PANI)films and polyaniline doped with La~(3+)(PANI/La~(3+))films were synthesized by cyclic voltammetry(CV).The effects of La~(3+)concentration on the structure and morphology of PANI films and PANI/La~(3+)films were characterized by FI-IR,XRD,SEM and EDS.And electrochemical performance of PANI films and PANI/La~(3+)films were tested by cyclic voltammetry,galvanostatic charge-discharge test(CP)and electrochemical impedance spectroscopy(EIS).The results suggest that the PANI/La~(3+)films show a larger specific capacitance of 100F/g and better cycle stability,in 0.5mol/L H_2SO_4 electrolyte,at a current density of 5mA/cm,compared with the pure PANI film.
引文
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[2]Su D S,Schlogl R.Nanostructured carbon and carbon nanocomposites for electrochemical energy storage applications[J].Chemsus Chem,2010,3(2):136-168.
[3]朱磊,吴伯荣,陈晖,等.超级电容器研究及其应用[J].稀有金属,2003,27(3):385-390.
[4]涂亮亮,贾春阳.导电聚合物超级电容器电极材料[J].化学进展,2010,22(8):1610-1618.
[5]吕进玉,林志东.超级电容器导电聚合物电极材料的研究进展[J].材料导报,2007,21(3):29-31.
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[7]徐惠,李俊玲,彭振军,等.聚苯胺的电化学制备及电容特性[J].高分子材料科学与工程,2013,29(2):9-12.
[8]Xu Hui,Wu Junxia,Li Chunlei,et al.Investigation of polyaniline films doped polyaniline with Co2+as the electrode material for electrochemical supercapacitors[J].Ionics,2015,21(4):1163-1170.
[9]方静,崔沐,张治安,等.过渡金属盐掺杂聚苯胺材料及电容行为研究[J].功能材料,2011,42(1):171-174.
[10]Xu Hui,Wu Junxia,Li Chunlei,et al.Investigation of polyaniline films doped with Fe3+as the electrode material for electrochemical supercapacitors[J].Electrochimica Acta,2015,165(20):14-21.
[11]Li Jie,Cui Mu,Lai Yanqing,et al.Investigation of polyaniline co-doped with Zn2+and H+as the electrode material for electrochemical supercapacitors[J].Synthetic Metals,2010,160(11):1228-1233.
[12]吴涛.聚苯胺-镧的制备与表征[J].中国塑料,2010,24(8):41-44.
[13]孟振华.稀土元素的价电子结构和熔点、结合能的关联性[J].物理学报,2012,61(10):8.
[14]张丽霞,梁利芳,覃娜,等.导电聚苯胺/纳米氧化镧复合物的制备与表征[J].稀土,2009,30(1):53-56.
[15]Moon Y B,Cao Y,Smith P,Heeger A J.X-ray scattering from crystalline polyaniline[J].Polymer Communications,1989,30(7):196-199.