摘要
炭材料作为研究最早、使用最广泛的超级电容器电极材料,具有良好的热稳定性和化学稳定性,但传统炭材料的制备往往受成本、资源和环境等问题的限制,而生物质炭材料不仅具备孔隙率高、导电性能好等优异性能,且原料来源丰富、成本低廉。本实验采用废弃生物质——植鞣革屑为原材料制备多孔炭,相比于纯的胶原前驱体,植鞣剂单宁有助于碳元素含量提高。而后用化学氧化聚合法在多孔炭材料基底上原位生长聚吡咯进一步提高碳元素含量,再次炭化后制备得到高碳元素含量的革屑基复合炭材料。电化学测试表明,在三电极体系中,当电流密度为1 A/g时,电极比电容值可达330.5 F/g,并具有良好的倍率性能。由该材料组装而成的固态超级电容器,具有高的比电容值,在500 mV/s下进行5000次充放电循环后电容保持率接近100%。
Carbon material is the most widely used as electrode material for supercapacitor and studied first,which has good thermal stability and chemical stability.However,the preparation of traditional carbon materials is often limited by cost,resources,environment and other problems.Biochar materials not only have high porosity,excellent electrical conductivity and outstanding properties but also have rich sources of raw materials and low cost.Waste biomass(plant-tanned leather scraps)was used as raw materials to prepare porous carbon.Compared with pure collagen precursors,the vegetable tanning agent-tannin contributes to the increase of carbon content.Then,polypyrrole was grown in situ on the porous carbon substrate by chemical oxidation polymerization method to further improve the carbon content.After second carbonization,the leather shavings matrix composite carbon material with high carbon content was prepared.The electrochemical tests showed that the specific capacitance of the sample could reach 330.5 F/g at 1 A/g in the three-electrode system,it also showed a good rate performance.The supercapacitor assembled by this material has high specific capacitance values,and the capacitance retention rate is close to 100%after 5000 charge-discharge cycles at 500 mV/s.
作者
张莉
刘鹏云
邢志浩
刘畅
庞国馨
徐纪元
王雪
段宝荣
ZHANG Li;LIU Pengyun;XING Zhihao;LIU Chang;PANG Guoxin;XU Jiyuan;WANG Xue;DUAN Baorong(College of Chemistry&Chemical Engineering,Yantai University,Yantai 264005,China)
出处
《皮革与化工》
CAS
2023年第5期1-8,17,共9页
Leather And Chemicals
基金
山东省自然科学基金青年基金(ZR2020QE088)
烟台大学大学生创新创业训练计划(项目编号:X202211066031)。
关键词
固态超级电容器
植鞣革屑
单宁
聚吡咯
复合炭材料
solid state supercapacitor
waste leather shavings
tannins
PPy
composite carbon material
