relation: https://repository.unp.ac.id/id/eprint/38681/
title: Heterogeneous Cell Performance of Polymer Electrolyte Fuel Cell at High Current Operation: Respiration Mode as Non-Equilibrium Phenomenon
creator: Koizumi, Satoshi
creator: Ueda, Satoru
creator: Ananda, Putra
creator: Tsutsumi, Yasuyuki
subject: Q Science (General)
subject: TK Electrical engineering. Electronics Nuclear engineering
description: The heterogeneous performance of polymer electrolyte fuel cell in space and time was discussed for operation at high current density. The cell voltage, detected by a segmented electrode, varies along a gas flow channel from upper to bottom stream and oscillates in time, which is referred as a respiration mode. At the higher current, the cell voltage at different positions started to be synchronized, as the current density increases. In order to investigate a role of water on the respiration, we employed a new method of contrast variation for small-angle neutron scattering (SANS) using deuterium (D2) gas as a fuel. By using D2, we introduce special scattering contrast in a polymer electrolyte film (Nafion®), when the film is originally swollen by H2O. After switching from H2 to D2 gas (humidified with H2O), we found that SANS intensity significantly decreases about 40% at the q-position of scattering maximum (qm) originating from the water-microdomains in the polymer electrolyte. After quantitative analyses of the scattering intensity, it was elucidated that 20 wt% of the total water is occupied by D2O as a steady state. At around the average intensity, SANS intensity oscillates with a time interval ∼100sec, which corresponds to the respiration mode found for voltage. The respiration behavior is considered as a non-linear & non-equilibrium phenomenon in an open system, where water flooding plays a role of feedback to decelerate fuel transportation and chemical reaction of water generation.
publisher: AIP Publishing
date: 2019-06-12
type: Article
type: PeerReviewed
format: text
language: en
identifier: https://repository.unp.ac.id/id/eprint/38681/1/6_TURNITIN%20Heterogeneous%20cell%20performance%20of%20polymer%20electrolyte%20fuel%20cell%20at%20high%20current%20operation_%20Respiration%20mode%20as%20non-equilibrium%20phenomenon.pdf
identifier:   Koizumi, Satoshi and Ueda, Satoru and Ananda, Putra and Tsutsumi, Yasuyuki  (2019) Heterogeneous Cell Performance of Polymer Electrolyte Fuel Cell at High Current Operation: Respiration Mode as Non-Equilibrium Phenomenon.  AIP Advances, 9 (6).  pp. 1-9.  ISSN 2158-3226     
relation: https://pubs.aip.org/aip/adv/article/9/6/065206/22190/Heterogeneous-cell-performance-of-polymer