摘 要:本文首先采用硝酸表面氧化改性活性炭,再通过原位氧化吡咯单体聚合得到PPy/活性炭复合材料,研究其作为超级电容电极材料的电化学性能。采用FTIR、SEM和BET对复合材料进行表征。结果表明:PPy/活性炭复合材料彻底改变了活性炭原有的形貌,粒子呈现颗粒状且出现团聚现象,使得其表面积变小为36。95m2 g-1。通过采用循环伏安、恒电流充放电和交流阻抗电化学方法,考察在不同活性炭用量、不同合成温度下的最优电化学性能的PPy/活性炭复合材料。电化学测试表明:在1mol·L-1的H2SO4电解液中,0~1V电位范围内,合成材料温度为0℃且活性炭用量为0。1g条件下,所得PPy/活性炭复合材料表现出良好的电化学性能,最大比容量为111F g-1 。93408
毕业论文关键词: PPy/活性炭,超级电容器
Abstract: In this paper, PPy/activated carbon composites were synthesized for the supercapacitor electrode material by in situ oxidative polymerization of pyrrole monomer and activated carbon, in which activated carbon was pre-modified by nitric acid。 The PPy/activated carbon composites were characterized by FT-IR, SEM and BET methods。 The results showed that the original morphology of activated carbon completely changed and PPy presented as small particles and appeared as aggregates, results in the decrease of its BET surface area (to 36。95 m2g-1)。 The electrochemical performance of the PPy/activated carbon composites was investigated by cyclic voltammetry, galvanostatic charge/discharge and impedance measurements and the effect of different activated carbon dosage and different synthetic temperature was studied。 Tests showed that in the 1 mol·L-1 H2SO4 electrolyte and the potential range from 0 to 1V, PPy/activated carbon composites fabricated at 0 ℃ and with the dosage of 0。1 g activated carbon exhibited excellent electrochemical performance。 The maximum specific capacity is up to 111F g-1。
Keywords: bath deposition, PPy/activated carbon, supercapacitor
目 录
1 前言 1
2 实验部分 2
2。1 实验材料及设备 2
2。1。1 实验材料 2
2。1。3 测试仪器 2
2。2 材料制备 2
2。2。1 PPy纳米粒子的制备 2
2。2。2 活性炭的处理 3
2。2。3 不同质量活性炭的PPy/活性炭复合材料制备 3
2。2。4 不同温度的PPy/活性炭复合材料制备 3
2。3 电化学性能研究 3
2。3。1 电极材料的制备 3
2。3。2 电化学测试方法 4
3 结果与讨论 4
3。1红外谱图分析 4
3。1。1 不同质量活性炭的PPy/活性炭复合材料红外谱图分析 4
3。1。2 不同温度的PPy/活性炭复合材料红外谱图分析 5
3。2 BET图分析 6
3。1。3复合材料的形貌分析