Title: Ab initio molecular dynamics study of AlCl4- adsorption on PEDOT conducting polymer chains
Authors: Craig, Benjamin
Skylaris, Chris-Kriton
Ponce De Leon Albarran, Carlos
Kramer, Denis 
Language: en
Keywords: Ab initio molecular dynamics;Aluminium batteries;Conducting polymers;Density functional theory;Ionic liquid electrolyte;PEDOT;Pseudocapacitor
Subject (DDC): DDC::500 Naturwissenschaften und Mathematik::540 Chemie::541 Physikalische Chemie
Issue Date: 28-May-2021
Publisher: Elsevier
Document Type: Conference Object
Journal / Series / Working Paper (HSU): Energy Reports 
Volume: 7
Issue: Supplement 2
Page Start: 111
Page End: 119
Publisher Place: Amsterdam [u.a.]
Conference: 5th Annual CDT Conference in Energy Storage and Its Applications 
Abstract: 
In the search for alternatives to lithium batteries, aluminium makes a promising negative electrode due to its high theoretical specific energy and energy density. One battery chemistry making use of an aluminium negative electrode is the aluminium–poly(3,4-ethylenedioxythiophene) (PEDOT) battery, which has been shown to have long cycle life and specific energy comparable to other aluminium rechargeable batteries. The battery stores AlCl4− anions in the PEDOT cathode when charged. However, the storage mechanism is not well understood. Here, ab initio molecular dynamics simulations (AIMD) are used to help understand the optimum (relaxed) configuration of AlCl4− anions when stored on a single chain of PEDOT. Two main conclusions arise. Firstly, it is generally not stable to have two anions adsorbed to one monomer unit, and this configuration can be avoided for future work. Secondly, AIMD does not find lower energy configurations for the PEDOT/AlCl4− system than DFT geometry relaxation, providing that the starting geometry does not have two anions on the same monomer unit. Based on our results, we believe it is likely that similar behaviour will be observed in other conducting polymer systems.
Description: 
5th Annual CDT Conference in Energy Storage & Its Applications ; Conference date: 12-01-2021 Through 12-01-2021
Organization Units (connected with the publication): Computational Material Design 
URL: https://www.sciencedirect.com/science/article/pii/S2352484721001335
ISSN: 2352-4847
DOI: 10.1016/j.egyr.2021.02.035
Appears in Collections:Publications of the HSU Researchers

Show full item record

CORE Recommender

Google ScholarTM

Check

Altmetric

Altmetric


Items in openHSU are protected by copyright, with all rights reserved, unless otherwise indicated.