摘要
高锰酸钾(KMnO_(4))和废轮胎热解炭(AC)在室温下水溶液中发生共沉淀氧化还原反应,制备了球状废轮胎热解炭/二氧化锰纳米片复合电极材料(AC-MnO_(2)),通过改变AC与KMnO_(4)的反应时间控制纳米复合材料的形态以及二氧化锰(MnO_(2))在AC上的负载量。研究结果表明:在1 moL/L Na 2SO_(4)电解液中,反应时间为1 h制备的样品(AC-MnO_(2)-1)比电容为177.4 F/g(1 A/g)。即使在10 A/g的高电流密度下,经过10000次循环后,AC-MnO_(2)-1的电容保持率也达到99.72%。以此纳米复合材料作为正负电极材料组装了对称超级电容器(SSC),1 A/g时的比电容高达80.3 F/g,能量密度为18.0 Wh/kg,功率密度为899.6 W/kg。
Spherical AC-MnO_(2)nanosheet composite electrode is prepared by the co-precipitation redox reaction between potassium permanganate(KMnO_(4))and activated carbon derived from waste tires(AC)in aqueous solution.The morphology of the nanocomposites as well as the loading amount of manganese dioxide(MnO_(2))on AC are controlled by varying the reaction time of AC and KMnO_(4).The results show that the specific capacitance of the sample(AC-MnO_(2)-1)prepared with a reaction time of 1 h in 1 mol/L Na 2SO_(4)electrolyte is 177.4 F/g(1 A/g).The capacitance retention of AC-MnO_(2)-1 reaches 99.72%even after 10,000 cycles at a high current density of 10 A/g.A symmetric supercapacitor(SSC)is assembled with this nanocomposite as the positive and negative electrode materials,and the specific capacitance at 1 A/g is as high as 80.3 F/g with an energy density of 18.0 Wh/kg and a power density of 899.6 W/kg.
作者
邰清宁
楚冬海
张达志
TAI Qingning;CHU Donghai;ZHANG Dazhi(Xuzhou College of Industrial Technology,Xuzhou 221140,China)
出处
《河南化工》
CAS
2024年第9期22-27,共6页
Henan Chemical Industry
基金
徐州工业职业技术学院揭榜项目(XGY2023ZXJB03)。
关键词
二氧化锰
废轮胎热解炭
复合电极材料
超级电容器
电化学性能
manganese dioxide
waste tire pyrolysis carbon
composite electrode material
supercapacitor
electrochemical performance
