【摘要】 以空心介孔硅球为模板,酚醛树脂乙醇溶液为碳源制得了分级多孔碳(HPCs)。以酸化处理后的HPCs为载体、对甲苯磺酸(p-TSA)为掺杂剂、三氯化铁(FeCl3)为氧化剂,通过原位化学氧化聚合法制备了聚吡咯-分级多孔碳(PPy-HPCs)纳米复合材料。采用场发射扫描电镜(FESEM)、透射电镜(TEM)、傅里叶红外光谱仪(FT-IR)、恒流充放电、循环伏安以及交流阻抗等测试技术对复合材料进行了形貌结构和电化学性能的研究。结果表明:聚吡咯成功地包覆在HPCs的表面,随着聚吡咯含量的增加,复合材料的比容量呈现先增大后减小的趋势。当聚吡咯的质量含量为34.9%时,复合材料在电流密度为0.1A/g时达到最大比容量(316F/g),在1A/g的电流密度下循环1 000次后,比容量保持率为95.8%,聚吡咯的引入有效地提高了HPCs电极材料的电化学性能。更多还原

【Abstract】 Hierarchical porous carbons(HPCs) were fabricated using hollow mesoporous silica spheres as hard templates and phenolic resin ethanol solution as carbon source.Polypyrrole-hierarchical porous carbons(PPy-HPCs) composites were successfully synthesized by in situ chemical oxidative polymerization method with p-TSA as the dopant and FeCl3 as the oxidant.The morphology,structure and electrochemical performance of PPy-HPCs nanocomposites were characterized by field emission scanning electron microscopy(FESEM),transmission electron microscopy(TEM),Fourier transform infrared(FT-IR) spectra,galvanostatic charge-discharge,cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS) measurements.Results showed that PPy were deposited on the surface of HPCs.A maximum specific capacitance of 316 F/g was obtained at a current density of 0.1 A/g and the specific capacitance retained 95.8% after 1 000 charge-discharge cycles at a current density of 1 A/g when the PPy mass content was 34.9%.The electrochemical performance of HPCs electrode can be effectively improved by introduction of PPy.更多还原