Journal article
Ion Intercalation into Graphitic Carbon with a Low Surface Area for High Energy Density Supercapacitors
Journal of the Electrochemical Society, v 161(10), pp A1486-A1494
01 Jul 2014
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Commercial porous activated carbons have a high surface area and gravimetric capacitance but a low pack density. In this work, highly ordered graphitic carbons with different microcrystalline structures were prepared by the calcination and KOH-activation of petroleum coke. When the graphitic carbons were electrochemically activated at 4 V, specific capacitance was increased to 166 F/g from a very low initial value caused by the low surface area. The energy and power density reached 48.5 Wh/kg (32.8 Wh/L) and 6106 W/kg (4132.4 W/L), respectively, at 3.3 A/g. Electrochemical activation is believed to be a voltage-driven ion intercalation process, in which abundant ion-accessible sites are created and can be used for mixed ion adsorption/intercalation charge storage. The effects of solvents, applied voltage, and cation selection on the ion intercalation behavior were systematically studied using galvanostatic charge-discharge and cyclic voltammetry techniques. The results revealed that higher applied voltage, shorter chain length, and weaker solvent-ion interactions favor ion intercalation to the positive and negative electrodes, consequently leading to symmetrical capacitive responses and maximum cell performance.
Metrics
Details
- Title
- Ion Intercalation into Graphitic Carbon with a Low Surface Area for High Energy Density Supercapacitors
- Creators
- Chuanfang Zhang - Drexel University A. J. Drexel Nanomaterials Institute (DNI), Department of Materials Science and Engineering, Philadelphia, Pennsylvania 19104, USAYingbo Xie - Titanchem Co., LTD , Shanghai 200237, People's Republic of ChinaGangwei Sun - East China University of Science and Technology State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Shanghai 200237, People's Republic of ChinaAmanda Pentecost - Drexel University A. J. Drexel Nanomaterials Institute (DNI), Department of Materials Science and Engineering, Philadelphia, Pennsylvania 19104, USAJitong Wang - East China University of Science and Technology State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Shanghai 200237, People's Republic of ChinaWenming Qiao - East China University of Science and Technology State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Shanghai 200237, People's Republic of ChinaLicheng Ling - East China University of Science and Technology State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Shanghai 200237, People's Republic of ChinaDonghui Long - East China University of Science and Technology State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Shanghai 200237, People's Republic of ChinaYury Gogotsi - Drexel University A. J. Drexel Nanomaterials Institute (DNI), Department of Materials Science and Engineering, Philadelphia, Pennsylvania 19104, USA
- Publication Details
- Journal of the Electrochemical Society, v 161(10), pp A1486-A1494
- Publisher
- The Electrochemical Society
- Number of pages
- 9
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000341217500003
- Scopus ID
- 2-s2.0-84920731793
- Other Identifier
- 991014969865404721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Electrochemistry
- Materials Science, Coatings & Films