摘要
用海藻酸钠作为结构导向剂,通过原位氧化聚合吡咯法制备了聚吡咯/海藻酸钠(PPy/SA)纳米球.聚吡咯/海藻酸钠纳米球的形貌和结构通过扫描电镜(SEM)、X射线衍射(XRD)和傅里叶变换红外(FTIR)光谱进行表征.材料的电化学性能通过循环伏安法和恒电流充放电方法进行测试.电化学测试表明,聚吡咯/海藻酸钠纳米球在1 mol L-1KCl电解液中,电流密度为1 A g-1时其比电容高达347 F g-1.与纯聚吡咯相比较,聚吡咯/海藻酸钠纳米球具有更优异的循环稳定性能.
Polypyrrole/sodium alginate （PPy/SA） nanospheres are successfully synthesized by oxidative polymerization of pyrrole using sodium alginate as structural templating agent. The morphology and structure of the PPy/SA nanospheres were characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, and Fourier transform infrared （FTIR） spectroscopy. Their electrochemical properties are investigated by cyclic voltammetry （CV） and galvanostatic charge-discharge tests. The PPy/SA nanospheres exhibit a high specific capacitance of 347 F. g-1 at a charge-discharge current density of 1 A.g-1 in 1 mol· L-1 KCI electrolyte. Unlike pure PPy, there was little attenuation in the capacitance of the PPy/SA nanospheres over 500 continuous charging-discharging cycles demonstrating good electrochemical stability. This result indicates that PPy/SA nanospheres are a promising candidate for high-performance supercapacitors.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2013年第11期2385-2391,共7页
Acta Physico-Chimica Sinica
基金
supported by the National Natural Science Foundation of China(21164009,21174114)
Program for Changjiang Scholars and Innovative Research Team in University,China(IRT1177)~~
关键词
聚吡咯
海藻酸钠
纳米球
超级电容器
电极材料
Potypyrrole
Sodium alginate
Nanosphere
Supercapacitor
Electrode materia
