Molecular Dynamics Study of Proton Conductivity at an Interface between Nafion and Graphene Sheet

Rikki Tanaka, Takuya Mabuchi, Yushi Zang, Bruce Hinds, Takashi Tokumasu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In order to clarify the proton transport phenomena in Nafion/carbon nanotubes (CNTs) composite membranes, we focused on the interfacial transport between Nafion and graphene sheets (GSs). We investigated the water content dependence of proton transport and structural properties at the interface between Nafion and GSs using molecular dynamics simulations. The density distribution, water cluster analysis at the interface region, and the self-diffusion coefficient of protons at the interface region were obtained at different water contents. The self-diffusion coefficients of protons at the interface were larger than those of the Nafion bulk for all the water contents because of the formation of water layer near the interface. Our findings provide insight into the relationship between the proton transport and the interfacial structure at molecular level, which suggests a possible improvement on proton transport with addition of CNTs with high specific surface area.

Original languageEnglish
Title of host publication240th ECS Meeting - Polymer Electrolyte Fuel Cells and Electrolyzers 21 (PEFC and E 21)
PublisherIOP Publishing Ltd.
Pages309-316
Number of pages8
Edition8
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 2021
Event240th ECS Meeting - Orlando, United States
Duration: 2021 Oct 102021 Oct 14

Publication series

NameECS Transactions
Number8
Volume104
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862

Conference

Conference240th ECS Meeting
Country/TerritoryUnited States
CityOrlando
Period21/10/1021/10/14

ASJC Scopus subject areas

  • Engineering(all)

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