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Title: Capacitance, charge dynamics, and electrolyte-surface interactions in functionalized carbide-derived carbon electrodes

Journal Article · · Progress in Natural Science

Our study analyzed the dynamics of ionic liquid electrolyte inside of defunctionalized, hydrogenated, and aminated pores of carbide-derived carbon supercapacitor electrodes. The approach tailors surface functionalities and tunes nanoporous structures to decouple the influence of pore wall composition on capacitance, ionic resistance, and long-term cyclability. Moreover, quasi-elastic neutron scattering probes the self-diffusion properties and electrode-ion interactions of electrolyte molecules confined in functionalized pores. Room-temperature ionic liquid interactions in confined pores are strongest when the hydrogen-containing groups are present on the surface. This property translates into higher capacitance and greater ion transport through pores during electrochemical cycling. Aminated pores, unlike hydrogenated pores, do not favorably interact with ionic liquid ions and, subsequently, are outperformed by defunctionalized surfaces.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1233943
Alternate ID(s):
OSTI ID: 1265882
Journal Information:
Progress in Natural Science, Journal Name: Progress in Natural Science Vol. 25 Journal Issue: 6; ISSN 1002-0071
Publisher:
ElsevierCopyright Statement
Country of Publication:
China
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

References (43)

Computational chemistry for graphene-based energy applications: progress and challenges journal January 2015
Ionic liquids: perspectives for organic and catalytic reactions journal May 2002
Influence of the structure of carbon onions on their electrochemical performance in supercapacitor electrodes journal August 2012
Charging Dynamics and Optimization of Nanoporous Supercapacitors journal June 2013
Structural evolution of carbide-derived carbons upon vacuum annealing journal November 2012
Thermal stability of low temperature ionic liquids revisited journal March 2004
Anomalous Increase in Carbon Capacitance at Pore Sizes Less Than 1 Nanometer journal September 2006
Enhanced capacitance of nitrogen-doped hierarchically porous carbide-derived carbon in matched ionic liquids journal January 2015
Accelerating charging dynamics in subnanometre pores journal March 2014
Capacitive Energy Storage in Nanostructured Carbon–Electrolyte Systems journal June 2012
Nitrogen-Enriched Hierarchically Porous Carbons Prepared from Polybenzoxazine for High-Performance Supercapacitors journal August 2014
High power density electrodes for Carbon supercapacitor applications journal July 2005
Carbon materials for supercapacitor application journal January 2007
Molecular Insights into Carbon Supercapacitors Based on Room-Temperature Ionic Liquids journal September 2013
Experimental evidence of logarithmic relaxation in single-particle dynamics of hydrated protein molecules journal January 2010
Porous 3D graphene-based bulk materials with exceptional high surface area and excellent conductivity for supercapacitors journal March 2013
Densification of Ionic Liquid Molecules within a Hierarchical Nanoporous Carbon Structure Revealed by Small-Angle Scattering and Molecular Dynamics Simulation journal December 2013
Carbide-Derived Carbons - From Porous Networks to Nanotubes and Graphene journal February 2011
Structure and Electrochemical Performance of Carbide-Derived Carbon Nanopowders journal July 2012
Nanoporous Carbon Supercapacitors in an Ionic Liquid: A Computer Simulation Study journal March 2010
Materials for electrochemical capacitors journal November 2008
Quenched solid density functional theory method for characterization of mesoporous carbons by nitrogen adsorption journal April 2012
Effect of accelerated ageing on the performance of high voltage carbon/carbon electrochemical capacitors in salt aqueous electrolyte journal June 2014
Solvent effect on the ion adsorption from ionic liquid electrolyte into sub-nanometer carbon pores journal November 2009
Dynamic Behavior of Oligomeric Inorganic Pyrophosphatase Explored by Quasielastic Neutron Scattering journal August 2012
Synthesis and high electrochemical capacitance of N-doped microporous carbon/carbon nanotubes for supercapacitor journal May 2012
Electrochemical Characteristics and Impedance Spectroscopy Studies of Carbon-Carbon Supercapacitors journal January 2003
Novel Electrochemical Studies of Ionic Liquids journal March 2002
Titanium carbide derived nanoporous carbon for energy-related applications journal October 2006
Nanoporous carbide-derived carbon with tunable pore size journal August 2003
Impact of synthesis conditions on surface chemistry and structure of carbide-derived carbons journal January 2010
Covalent Incorporation of Aminated Nanodiamond into an Epoxy Polymer Network journal August 2011
Functionalization of Porous Carbon Materials with Designed Pore Architecture journal January 2009
Adsorption of Gases in Multimolecular Layers journal February 1938
Ion exclusion by sub-2-nm carbon nanotube pores journal June 2008
Nanostructural Organization in Ionic Liquids journal February 2006
Fast diffusion in a room temperature ionic liquid confined in mesoporous carbon journal March 2012
Selective Ion Passage through Functionalized Graphene Nanopores journal December 2008
A time-of-flight backscattering spectrometer at the Spallation Neutron Source, BASIS journal August 2011
The influence of a hierarchical porous carbon network on the coherent dynamics of a nanoconfined room temperature ionic liquid: A neutron spin echo and atomistic simulation investigation journal November 2014
XPS investigation of the reaction of carbon with NO, O2, N2 and H2O plasmas journal January 2007
Temperature Dependence of Logarithmic-like Relaxational Dynamics of Hydrated tRNA journal March 2013
Effect of pore size and surface area of carbide derived carbons on specific capacitance journal July 2006