宁夏大学学报（自然科学版中英文）2026，Vol.47Issue(5)：478-488,11.DOI:10.20176/j.cnki.nxdz.20260908
水稻秸秆与PVC共热解制备炭材料及其电化学性能
Co-pyrolysis of Rice Straw and PVC for the Preparation of Carbon Materials and Their Electrochemical Performance
摘要
Abstract
To achieve the efficient and synergistic resource utilization of biomass and waste plastics,a co-pyrolysis method of rice straw(RS)and polyvinyl chloride(PVC)was employed to prepare high-performance capacitor carbon materials(PR).This study investigated the reaction pathways of the co-pyrolysis process and the structure-performance relationship of PR.A Joule heating device was used for rapid co-pyrolysis experi-ments,where the pyrolysis temperature(t=500,600,700,800℃)and the material ratio(m(PVC):m(RS)=3:1,2:1,1:1,1:2,1:3)were adjusted to produce a series of porous PRs.The micro-morphology,graphiti-zation degree,and functional group characteristics of PR were characterized using thermogravimetry-derivative thermogravimetry(TG-DTG),scanning electron microscopy(SEM),Raman spectroscopy,and Fourier transform infrared spectroscopy(FTIR).The electrochemical double-layer capacitance storage performance and hydrogen evolution reaction(HER)performance were tested using a three-electrode system.The results indicated a significant positive synergistic effect in the RS and PVC co-pyrolysis system,where RS effectively lowered the initial decomposition temperature of PVC and enhanced the pyrolysis rate.As the temperature increased,the graphitization degree and defect density(ID/IG)of PR increased;however,when t>700℃,the pore structure of PR collapsed,hindering ion transport in the electrolyte.When t=600℃and m(PVC):m(RS)=1:3,the pyrolyzed PR exhibited a hierarchical porous structure and suitable defect structure(ID/IG≈2.0),dem-onstrating optimal electrochemical performance,with the electrochemically active surface area corresponding to the double-layer capacitance(Cdl)reaching its maximum value(1.318 5 μF/cm²)and exhibiting the lowest hydrogen evolution overpotential.The incorporation of RS not only constructed a developed ion transport chan-nel but also mitigated the adverse effects arising from the PVC pyrolysis process through the synergistic effect,providing a reference for the development of low-cost,high-performance carbon-based energy storage materi-als.关键词
秸秆/PVC/焦耳加热/炭结构性质/资源化利用Key words
Joule heating/straw/PVC/carbon structural properties/resource utilization分类
建筑与水利引用本文复制引用
张启昂,吴子越,王薇,柯梅容,汪威尔,高艳飞,王焦飞..水稻秸秆与PVC共热解制备炭材料及其电化学性能[J].宁夏大学学报（自然科学版中英文）,2026,47(5):478-488,11.基金项目
国家自然科学基金地区科学基金资助项目(22468041) （22468041）
宁夏自然科学基金优秀青年基金资助项目(2024AAC05007) （2024AAC05007）
宁夏大学大学生创新创业训练计划基金资助项目(S202410749119) （S202410749119）
