Production of Biochar Based Porous Carbon Nanofibers for High-Performance Supercapacitor Applications

Trends in Renewable Energy Pub Date : 2019-04-08 DOI:10.17737/TRE.2019.5.2.0095

S. Xiu, Spero Gbewonyob, A. Shahbazi, Lifeng Zhang

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引用次数: 3

Abstract

Biomass-derived biochar was used as the precursor to synthesize porous carbons for supercapacitor electrodes. The biochar was first activated with KOH to generate porous carbon material and then fabricated into highly flexible porous carbon nanofibers (ECNF) by electrospinning technique. Activated carbons with a surface area of around 2258 m 2 /g were found. The resultant biochar based ECNF mats exhibited outstanding mechanical flexibility and electrochemical properties as free-stranding and binder free electrodes of supercapacitor. The PAN/BCK3 ECNFs, which were made from the composite of polyacrylonitrile (PAN) and KOH-activated biochar (mass ratio of Biochar/KOH =1:3) exhibited the highest gravimetric capacitance (108 F/g at current density of 0.5 A/g) with high retention (96% at 1 A/g) due to its well-developed micro-mesoporosity. The results indicated that biomass-derived biochar is a promising material which can be used for the production of low cost high performance electrode materials for supercapacitor. Citation: Xiu, S., Gbewonyob, S., Shahbazi, A., and Zhang, L. (2019). Production of Biochar Based Porous Carbon Nanofibers for High-Performance Supercapacitor Applications. Trends in Renewable Energy, 5, 151-164. DOI: 10.17737/tre.2019.5.2.0095

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高性能超级电容器用生物炭基多孔碳纳米纤维的制备

以生物质生物炭为前驱体制备超级电容器电极用多孔碳。将生物炭用KOH活化生成多孔碳材料，然后采用静电纺丝技术制备高柔韧性多孔碳纳米纤维。活性炭的表面积约为2258 m2 /g。所制备的生物炭基ECNF垫具有优异的机械柔韧性和电化学性能，可作为超级电容器的自由链电极和无粘结剂电极。由聚丙烯腈(PAN)和KOH活化的生物炭(生物炭/KOH的质量比为1:3)复合制备的PAN/BCK3 ECNFs由于具有良好的微介孔，在0.5 A/g电流密度下具有最高的重量电容(108 F/g)和较高的保留率(1 A/g时为96%)。结果表明，生物质生物炭是一种很有前途的材料，可用于生产低成本、高性能的超级电容器电极材料。引用本文:Xiu, S.， Gbewonyob, S.， Shahbazi, A.， Zhang, L.(2019)。高性能超级电容器用生物炭基多孔碳纳米纤维的制备。可再生能源动态，5,151-164。DOI: 10.17737 / tre.2019.5.2.0095

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Trends in Renewable Energy

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