Supercapacitive studies on electropolymerized natural organic phosphate doped polypyrrole thin films
Supercapacitive studies on electropolymerized natural organic phosphate doped polypyrrole thin films
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DOI：
10.1016/j.electacta.2016.10.118
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发表时间：
2016-12
影响因子：
6.6
通讯作者：
Murugesan Rajesh;C. J. Raj;B. C. Kim;Bo-Bae Cho;J. Ko;K. Yu
中科院分区：
文献类型：
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作者：
Murugesan Rajesh;C. J. Raj;B. C. Kim;Bo-Bae Cho;J. Ko;K. Yu
报道了植酸（PA）掺杂聚吡咯（PPy）薄膜的电化学聚合及其在超级电容器中的应用。利用扫描电子显微镜、傅立叶变换红外光谱和拉曼光谱分析了PA掺杂聚吡咯薄膜的表面形貌和各种官能团的存在。采用循环伏安法、交流阻抗法和恒流充放电技术研究了PA/PPy薄膜在1 M H2SO 4电解液中的电化学性能和超级电容器行为。研究了吡咯单体浓度、植酸浓度、沉积时间等实验条件对聚吡咯薄膜电聚合的影响。其中，0.1 M PA掺杂的0.6 M吡咯薄膜在不锈钢（SS）衬底上沉积10 min，在5 mVs-1扫描速率下表现出297 Fg-1的最大比电容和41.25 Whkg-1的能量密度。此外，同样的最佳条件已被扩展用于在钛（Ti）基底上的PA/PPy薄膜的电聚合，并在5 mVs-1扫描速率下获得了343 Fg-1的最大比电容和47.64 Whkg-1的高能量密度。此外，SS和Ti基底涂覆的PA/PPy电极在10 Ag− 1电流密度下显示出高的充电/放电效率，在4000次循环后的比电容保持率分别为约91%和77%，这表明所制备的电极具有良好的电化学可逆性和循环稳定性。
We report the electropolymerization of phytic acid (PA) doped polypyrrole (PPy) thin film for supercapacitor application. The surface morphology and presence of various functional groups in PA doped PPy films were analyzed using scanning electron microscopy, FTIR and Raman spectroscopy. The electrochemical properties and supercapacitor behavior of the PA/PPy thin films were performed using cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge/discharge techniques in 1 M H2SO4electrolyte. The effect of various experimental conditions such as concentration of pyrrole monomer, phytic acid and deposition time have been studied to affirm the optimized electropolymerization of PA doped PPy thin film. Among these, 0.1 M PA doped 0.6 M of pyrrole thin film deposited on stainless steel (SS) substrate for 10 min exhibited a maximum specific capacitance of 297 Fg−1and energy density 41.25 Whkg−1at 5 mVs−1scan rate. In addition, the same optimum condition have been extended for electropolymerization of PA/PPy thin film on titanium (Ti) substrate and achieved a maximum specific capacitance of 343 Fg−1with high energy density 47.64 Whkg−1at 5 mVs−1scan rate. Moreover, SS and Ti substrate coated PA/PPy electrodes show high charge/discharge efficiency at 10 Ag−1current density with ∼91% and 77% of specific capacitance retention after 4000 cycles, which indicates good electrochemical reversibility and cycling stability of the fabricated electrodes.