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Capacitive charge storage at an electrified interface investigated via direct first-principles simulations [Direct Simulation of Capacitive Charging of Graphene and Implications for Supercapacitor Design]

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [1];  [2];  [2];  [3];  [2]
  1. Univ. of Michigan, Ann Arbor, MI (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. National Institute of Advanced Industrial Science and Technology, Tsukuba (Japan)
Understanding the impact of interfacial electric fields on electronic structure is crucial to improving the performance of materials in applications based on charged interfaces. Supercapacitors store energy directly in the strong interfacial field between a solid electrode and a liquid electrolyte; however, the complex interplay between the two is often poorly understood, particularly for emerging low-dimensional electrode materials that possess unconventional electronic structure. Typical descriptions tend to neglect the specific electrode-electrolyte interaction, approximating the intrinsic “quantum capacitance” of the electrode in terms of a fixed electronic density of states. Instead, we introduce a more accurate first-principles approach for directly simulating charge storage in model capacitors using the effective screening medium method, which implicitly accounts for the presence of the interfacial electric field. Applying this approach to graphene supercapacitor electrodes, we find that results differ significantly from the predictions of fixed-band models, leading to improved consistency with experimentally reported capacitive behavior. The differences are traced to two key factors: the inhomogeneous distribution of stored charge due to poor electronic screening and interfacial contributions from the specific interaction with the electrolyte. Lastly, our results are used to revise the conventional definition of quantum capacitance and to provide general strategies for improving electrochemical charge storage, particularly in graphene and similar low-dimensional materials.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1325876
Alternate ID(s):
OSTI ID: 1181178
Report Number(s):
LLNL-JRNL--659616
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 12 Vol. 91; ISSN 1098-0121; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (43)

Carbon Materials for Chemical Capacitive Energy Storage journal September 2011
3D Aperiodic Hierarchical Porous Graphitic Carbon Material for High-Rate Electrochemical Capacitive Energy Storage journal January 2008
Ultracapacitors: why, how, and where is the technology journal November 2000
Capacitance limits of high surface area activated carbons for double layer capacitors journal May 2005
Ab initio molecular dynamics study of the Helmholtz layer formed on solid–liquid interfaces and its capacitance journal January 2013
Ionic liquids as electrolytes journal August 2006
Carbon properties and their role in supercapacitors journal June 2006
Supercapacitor Electrodes Based on Layered Tungsten Disulfide-Reduced Graphene Oxide Hybrids Synthesized by a Facile Hydrothermal Method journal October 2013
Specific Ion Effects at the Air/Water Interface journal April 2006
Quantum Mechanical Continuum Solvation Models journal August 2005
An interpretation of the double layer capacity of graphite electrodes in relation to the density of states at the Fermi level journal September 1985
van der Waals Volumes and Radii journal March 1964
Water Confined in Nanotubes and between Graphene Sheets:  A First Principle Study journal January 2008
Metallic Few-Layered VS 2 Ultrathin Nanosheets: High Two-Dimensional Conductivity for In-Plane Supercapacitors journal November 2011
First-Principles-Inspired Design Strategies for Graphene-Based Supercapacitor Electrodes journal December 2013
Screening Length and Quantum Capacitance in Graphene by Scanning Probe Microscopy journal January 2009
Graphene-Based Ultracapacitors journal October 2008
Origin of the dielectric dead layer in nanoscale capacitors journal October 2006
Ionic-liquid materials for the electrochemical challenges of the future journal July 2009
Measurement of the quantum capacitance of graphene journal July 2009
Carbon materials for supercapacitor application journal January 2007
Electrocapillary maximum and potential of zero charge of carbon aerogel journal January 2010
Advanced carbon aerogels for energy applications journal January 2011
Graphene based new energy materials journal January 2011
Interfacial capacitance of single layer graphene journal January 2011
Carrier statistics and quantum capacitance of graphene sheets and ribbons journal August 2007
Quantum capacitance and density of states of graphene journal April 2010
Measurements and microscopic model of quantum capacitance in graphene journal March 2011
On the influence of polarization effects in predicting the interfacial structure and capacitance of graphene-like electrodes in ionic liquids journal January 2015
Interaction phenomena in graphene seen through quantum capacitance journal February 2013
QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials journal September 2009
Band Structure of Graphite and de Haas-van Alphen Effect journal November 1957
Proof that ∂ E ∂ n i = ε in density-functional theory journal December 1978
First-principles calculations of charged surfaces and interfaces: A plane-wave nonrepeated slab approach journal March 2006
Van der Waals density functional: Self-consistent potential and the nature of the van der Waals bond journal September 2007
Efficient Implementation of a van der Waals Density Functional: Application to Double-Wall Carbon Nanotubes journal August 2009
Density of States and Zero Landau Level Probed through Capacitance of Graphene journal September 2010
Generalized Gradient Approximation Made Simple journal October 1996
Comment on “Generalized Gradient Approximation Made Simple” journal January 1998
Van der Waals Density Functional for General Geometries journal June 2004
Anomalous Increase in Carbon Capacitance at Pore Sizes Less Than 1 Nanometer journal September 2006
Observing the Quantization of Zero Mass Carriers in Graphene journal May 2009
Electrochemical Double-Layer Capacitance of MoS[sub 2] Nanowall Films journal January 2007

Cited By (2)

Computational Insights into Materials and Interfaces for Capacitive Energy Storage journal April 2017
Theoretical Study on the Quantum Capacitance Origin of Graphene Cathodes in Lithium Ion Capacitors journal October 2018

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