当前位置: X-MOL 学术Carbon Lett. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
High-performance electric double-layer capacitor fabricated with nanostructured carbon black-paint pigment as an electrode
Carbon Letters ( IF 4.5 ) Pub Date : 2020-06-08 , DOI: 10.1007/s42823-020-00159-5
V. Samynaathan , Sangeetha R. Iyer , K. Shree Kesavan , M. S. Michael

Engineering the microstructure of the carbonaceous materials is a promising strategy to enhance the capacitive performance of supercapacitors. In this work, nanostructured Black Pearl (1500 BP) carbon which is a conductive carbon being commercially used in printing rolls, conductive packaging, conductive paints, etc. is analyzed for its feasibility as an electrode material for Electric Double-Layer Capacitors (EDLCs). To achieve that commercial Black Pearl (BP), carbon is treated with mild acid H3PO4 to remove the impurities and enhance the active sites by regulating the growth of agglomerates and creating micropores in the nano-pigments. Generally, the coalescence of nanoparticles owing to their intrinsic surface energy has tendency to create voids of different sizes that act like meso/micropores facilitating the diffusion of ions. The electrochemical performance of BP carbon before and after chemical activation is investigated in aqueous (H2SO4, KOH and KCl) and a non-aqueous electrolyte (1 M TEMABF4 in acetonitrile) environment employing different electrochemical techniques such as Cyclic Voltammetry (CV), Galvanostatic charge/discharge (GCD) and Electrochemical Impendence Spectroscopy (EIS). The chemically activated BP carbon delivers the highest specific capacitance of ∼156 F g−1 in an aqueous electrolyte, 6 M KOH. The highest specific power, ~ 15.3 kW kg−1 and specific energy, 14.6 Wh kg−1 are obtained with a symmetric capacitor employing non-aqueous electrolyte because of its high working potential, 2.5 V.



中文翻译:

以纳米碳黑颜料为电极制备的高性能双电层电容器

对碳质材料的微观结构进行工程设计是提高超级电容器的电容性能的有前途的策略。在这项工作中,分析了纳米结构黑珍珠(1500 BP)碳,这是一种商业上可用于印刷辊,导电包装,导电涂料等的导电碳,它作为双电层电容器(EDLC)的电极材料的可行性。为了实现这种商业黑珍珠(BP),碳需要用弱酸H 3 PO 4处理通过调节团聚体的生长并在纳米颜料中形成微孔来去除杂质并增强活性位点。通常,由于纳米粒子的固有表面能,它们的聚结倾向于形成不同尺寸的空隙,这些空隙的作用类似于介孔/微孔,有助于离子的扩散。在水溶液(H 2 SO 4,KOH和KCl)和非水电解液(1 M TEMABF 4)中研究了化学活化前后BP碳的电化学性能在乙腈环境中使用不同的电化学技术,例如循环伏安法(CV),恒电流充/放电(GCD)和电化学阻抗谱(EIS)。化学活化的BP碳在6 M KOH的水性电解质中提供的最高比电容约为156 F g -1。使用非水电解质的对称电容器由于具有2.5 V的高工作电势,因此可获得最高的比功率〜15.3 kW kg -1和比能量14.6 Wh kg -1

更新日期:2020-06-08
down
wechat
bug