Force Field Optimization for Ionic Liquids: FFOIL

Annual Report 2015
  • Konrad BreitsprecherEmail author
  • Narayanan Krishnamoorthy Anand
  • Jens Smiatek
  • Christian Holm
Conference paper


In the reporting period July 2014 to June 2015, we performed molecular dynamics (MD) simulations with the software packages ESPResSo and Gromacs as well as custom MD-code to investigate different models of room temperature ionic liquids (RTILs) in confined environment and bulk solution. The application in mind is an IL-based electric double-layer capacitor, a non-faradaic energy storage device with advantages in power density and cycle stability over electrochemical cells. In this field, we have developed and applied force fields for ion-ion and ion-electrode interactions on different levels of detail. In 2014, we focused on algorithms for metal boundary conditions in various geometries, needed for realistic modeling of the charging process in a capacitor device. Further, we studied the effects of graphite structure on the adsorbed ions in planar capacitor setups. A possible one-dimensional force field for the interaction between ion and electrode was tested and compared to a fully modeled graphite surface with explicit carbon atoms. This allowed us to show the increased adsorption of the ionic liquid on graphite surfaces due to the texturing influence of the honeycomb pattern. More recently, we performed MD-simulations with electrolyte mixtures and accurate models for carbide-derived carbon electrode systems. In this ongoing work, we study the effect of solvent concentration in ionic liquids on the capacitance of the porous electrode material.


Ionic Liquid Porous Electrode Charge Induction Polarizable Force Field Electronic Density Functional Theory 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Konrad Breitsprecher
    • 1
    Email author
  • Narayanan Krishnamoorthy Anand
    • 1
  • Jens Smiatek
    • 1
  • Christian Holm
    • 1
  1. 1.Institute for Computational PhysicsUniversity of StuttgartStuttgartGermany

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