利用激光制备多层石墨烯设计的对称超级电容器器件的电化学性能
Electrochemical performance of a symmetric supercapacitor device designed using laser-produced multilayer graphene
Gargi Dhiman 1Kavita Kumari 2Bon-Heun Koo 2Faheem Ahmed 3Nagih M.Shaalan 4Saurabh Dalela 5Parvez A.Alvi 6Ranjeet Kumar Brajpuriya 1Shalendra Kumar1
作者信息
- 1. Department of Physics,School of Advanced Engineering,UPES,Dehradun 248007,India
- 2. Industrial Technology Research Institute,Changwon National University,Changwon,Gyeongnam 51140,Republic of Korea
- 3. Department of Applied Sciences and Humanities,Faculty of Engineering and Technology,Jamia Millia Islamia,New Delhi 110025,India
- 4. Department of Physics,College of Science,King Faisal University,P.O.Box 400,Al-Ahsa 31982,Saudi Arabia;Physics Department,Faculty of Science,Assiut University,Assiut 71516,Egypt
- 5. Department of Pure & Applied Physics,University of Kota,Kota,Rajasthan 324005,India
- 6. Department of Physical Science,Banasthali Vidyapith,Banasthali,Rajasthan,304022,India
- 折叠
摘要
本研究报告了一种经济高效的激光诱导石墨烯(LIG)制备方法,该方法可提高LIG在超级电容器中的电化学性能.以聚酰亚胺聚合物为原料,在环境条件下用CO2激光照射可合成LIG.通过拉曼光谱和傅里叶变换红外光谱对制备的LIG样品进行了表征,验证了含有sp2杂化C=C键的多层石墨烯的形成.FE-SEM展示出LIG的三维(3D)片状结构,HR-TEM图像显示了晶面间距约为0.33 nm的晶格平面,对应于石墨烯的(002)平面.LIG的电化学性能显示,在1 mA cm-2(3.3 A g-1)的电流下,在1 mol L-1 KOH作为水性电解质的三电极配置中,其面积比电容(CA)为51 mF cm-3(170 Fg-2).LIG电极有3.5 μWh cm-2能量密度、350 μW cm-2的功率密度等显著的储能能力.它们还具有优异的循环稳定性,在1 mA cm-2下循环3 000次后仍保持87％的比电容.使用LIG电极和1 mol L-1 KOH电解质制造的对称超级电容器的比电容为23 mF cm-2,在10 000次循环后表现出优异的保留率,显示了 LIG在超级电容器中的应用潜力.
Abstract
We report an economical approach for the fabrication of laser-produced graphene(LPG)electrodes,which results in an improved electrochemical performance.Polyimide polymer was used as the starting material for LPG synthesis and was irradiated under ambient conditions with a CO2 laser.The prepared LPG samples were characterized by Raman spectroscopy and FTIR,which validated the formation of multilayer graphene containing sp2 hybridized C=C bonds.FE-SEM revealed three-dimensional(3D)sheet-like structures,while HR-TEM images showed lattice planes with an interplanar spacing of approximately 0.33 nm,corres-ponding to the(002)plane of graphene.Their electrochemical performance showed a remarkable areal specific capacitance(CA)of 51 mF cm-2(170 F g-1)at 1 mA cm-2(3.3 A g-1)in a three-electrode configuration with 1 mol L-1 KOH as the aqueous electrolyte.The LPG electrodes produced an energy density of～3.5 μWh cm-2 and a power density of～350 μW cm-2,demonstrating signific-ant energy storage ability.They also had an excellent cycling stability,retaining 87％of their specific capacitance after 3 000 cycles at 1 mA/cm2.A symmetric supercapacitor fabricated with LPG electrodes and the 1 mol L-1 KOH electrolyte had a specific capacit-ance of 23 mF cm-2 and showed excellent retention after 10 000 cycles,showing LPG's potential for use in supercapacitors.
关键词
超级电容器/石墨烯/激光直写石墨烯/电化学研究/电荷储存机理Key words
Supercapacitors/Graphene/LPG/Electrochemical studies/Charge storage mechanism引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据