| 引用本文: | 吴佩琦,王景平,吴成俊,任佳悦,白杨.聚吡咯/纳米二氧化钛的制备及电化学性能[J].材料科学与工艺,2019,27(3):90-96.DOI:10.11951/j.issn.1005-0299.20180129. |
| WU Peiqi,WANG Jingping,WU Chengjun,REN Jiayue,BAI Yang.Preparation and electrochemical properties of polypyrrole/ nano-TiO2 composite[J].Materials Science and Technology,2019,27(3):90-96.DOI:10.11951/j.issn.1005-0299.20180129. |
|
| 摘要: |
| 采用化学原位聚合的方法制备了聚吡咯/二氧化钛(PPy/TiO2)复合物，其中聚吡咯和二氧化钛的质量比分别为1:1、2:1、3:1、4:1，将其作为电化学超级电容器的电极材料，采用扫描电子显微镜和X射线衍射仪研究了PPy/TiO2的形貌和相组成，通过电化学测试研究了PPy/TiO2的电化学性能.结果表明：TiO2均匀地包覆在PPy基体中，PPy/TiO2的电化学性能明显优于纯PPy；当PPy与TiO2的质量比为3:1时复合材料的电化学性能最佳，即在2 A/g充放电电流密度下，其比电容达到了255.68 F/g，比纯PPy提高了2倍左右；在1 A/g充放电电流密度下，循环充放电1 000圈之后PPy/TiO2的比电容保持率为87.2%，纯PPy的比电容保持率仅为46.9%. |
| 关键词: 聚吡咯 二氧化钛 超级电容器 比电容 电极材料 |
| DOI：10.11951/j.issn.1005-0299.20180129 |
| 分类号:O646 |
| 文献标识码:A |
| 基金项目:西安市科技计划项目(2017068CG/RC031(SXKD007)). |
|
| Preparation and electrochemical properties of polypyrrole/ nano-TiO2 composite |
|
WU Peiqi1, WANG Jingping1, WU Chengjun1, REN Jiayue1 , BAI Yang2
|
|
(1.Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi′an 710021, China; 2. Electrical and Information Engineering, Shaanxi University of Science and Technology, Xi′an 710021, China)
|
| Abstract: |
| Polypyrrole/titanium dioxide(PPy/TiO2) composites (the mass ratios of polypyrroletotitanium dioxide were 1:1, 2:1, 3:1, and 4:1) were prepared by chemical in-situ polymerization. As an electrode material of electrochemical supercapacitors, the electrochemical properties of the PPy/TiO2 were studied. Results of scanning electron microscopy and X-ray diffraction indicate that TiO2 particles were uniformly mounted in the PPy matrix. Test results show that the electrochemical performance of PPy/TiO2 was significantly better than that of pure-PPy. When the mass ratio of PPy to TiO2 was 3:1(PPy/TiO2(3:1)), the electrochemical performance of the composite was the best. At 2 A/g charging/discharging current density, the specific capacitance of PPy/TiO2(3:1) reached 255.68 F/g, which was twice higher than that of pure-PPy. At 1 A/g charging/discharging current density, the specific capacitance retention rate of PPy/TiO2(3:1) reached 87.2% after 1 000 cycles, and the retention rate of pure-PPy was only 46.9%. |
| Key words: polypyrrole titanium dioxide supercapacitor specific capacitance electrode material |
