Usha Rani Malothu, K. Donthula, M. Kakunuri, G. N. Nageswara Rao
{"title":"Binder-Free Flexible Chickpea Pod Derived Activated Carbon-Carbon Nanofiber Composite for Supercapacitor Application","authors":"Usha Rani Malothu, K. Donthula, M. Kakunuri, G. N. Nageswara Rao","doi":"10.1149/2162-8777/ad19e7","DOIUrl":null,"url":null,"abstract":"\n In the present study, a novel carbon-carbon composite electrode was prepared by embedding activated carbon derived from chickpea pods and evaluating its potential as an electrode for supercapacitors. A simple, single-step electrospinning technique was used for the synthesis of activated carbon-carbon nanofiber composite. The synthesized activated carbon-carbon nanofiber composite electrode is flexible and binder-free with high specific surface area, micro and meso pores, interconnected fiber-to-flake morphology and possess high graphitization. Additionally, rapid electrolyte diffusion has resulted in a low charge transfer resistance due to interconnected morphology. In 6 M KOH electrolyte, composite binder-free electrode shows a specific capacitance of 147 F g-1 at 0.5 A g-1 compared to activated carbon electrodes that showed a specific capacitance of 120 F g-1 at 0.5 A g-1. It exhibits an energy density of 13 Wh k g-1 at 0.366 W k g-1 power density. It also showed impressive cyclic stability by retaining 93.5 % of initial capacitance till 1200 cycles at 1 A g-1. Overall, the study presents an easy-to-use, low-cost, eco-friendly, and flexible electrode for supercapacitors that is free of binder.","PeriodicalId":504734,"journal":{"name":"ECS Journal of Solid State Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ECS Journal of Solid State Science and Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1149/2162-8777/ad19e7","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
In the present study, a novel carbon-carbon composite electrode was prepared by embedding activated carbon derived from chickpea pods and evaluating its potential as an electrode for supercapacitors. A simple, single-step electrospinning technique was used for the synthesis of activated carbon-carbon nanofiber composite. The synthesized activated carbon-carbon nanofiber composite electrode is flexible and binder-free with high specific surface area, micro and meso pores, interconnected fiber-to-flake morphology and possess high graphitization. Additionally, rapid electrolyte diffusion has resulted in a low charge transfer resistance due to interconnected morphology. In 6 M KOH electrolyte, composite binder-free electrode shows a specific capacitance of 147 F g-1 at 0.5 A g-1 compared to activated carbon electrodes that showed a specific capacitance of 120 F g-1 at 0.5 A g-1. It exhibits an energy density of 13 Wh k g-1 at 0.366 W k g-1 power density. It also showed impressive cyclic stability by retaining 93.5 % of initial capacitance till 1200 cycles at 1 A g-1. Overall, the study presents an easy-to-use, low-cost, eco-friendly, and flexible electrode for supercapacitors that is free of binder.
本研究通过嵌入从鹰嘴豆荚中提取的活性碳制备了一种新型碳-碳复合电极,并评估了其作为超级电容器电极的潜力。活性碳-碳纳米纤维复合材料的合成采用了简单的单步电纺丝技术。合成的活性碳-碳纳米纤维复合电极柔韧且不含粘合剂,具有高比表面积、微孔和中孔、纤维与薄片相互连接的形态以及高石墨化。此外,由于相互连接的形态,电解质的快速扩散导致了较低的电荷转移电阻。在 6 M KOH 电解液中,无粘结剂复合电极在 0.5 A g-1 的条件下显示出 147 F g-1 的比电容,而活性炭电极在 0.5 A g-1 的条件下显示出 120 F g-1 的比电容。在 0.366 W k g-1 功率密度下,它的能量密度为 13 Wh k g-1。它还表现出令人印象深刻的循环稳定性,在 1 A g-1 条件下循环 1200 次,仍能保持 93.5% 的初始电容。总之,这项研究为超级电容器提供了一种不含粘合剂的易用、低成本、环保和灵活的电极。