Preparation of high-performance polymer electrolyte nanocomposites through nanoscale silica particle dispersion
- Authors
- Lee, Chang Hyun; Park, Ho Bum; Park, Chi Hoon; Lee, So Young; Kim, Ju Young; McGrath, James E.; Lee, Young Moo
- Issue Date
- Mar-2010
- Publisher
- ELSEVIER
- Keywords
- Nanocomposite; Nano-level dispersion; Silica nanoparticle; Surfactant; Fuel cell
- Citation
- JOURNAL OF POWER SOURCES, v.195, no.5, pp.1325 - 1332
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 195
- Number
- 5
- Start Page
- 1325
- End Page
- 1332
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/175339
- DOI
- 10.1016/j.jpowsour.2009.08.102
- ISSN
- 0378-7753
- Abstract
- Nano-level dispersion with a minimum amount of non-porous and surface-functionalized nanoparticles is a key to tune physically a common polymer material with poor durability to a powerful material with excellent stability even under harsh fuel cell conditions. Surfactants composed of hydrophobic cores and hydrophilic outer shells are used to assist a homogenous distribution of surface-treated (hydrophilic and hydrophobic) silica nanoparticles. In particular, their effect on nanoparticle dispersion is conspicuous in polymer electrolyte nanocomposites containing hydrophilic surface-treated silica. The hydrophilic silica acts as an additional proton conductor in the acid electrolyte medium, leading to improved proton conductivity without any negative side-effects on the mechanical and chemical durability of the membrane material. The well-distributed hydrophilic silica nanoparticles are beneficial in preventing methanol permeation via compact polymer packing and in strengthening the membrane stability under hot aqueous conditions. Finally, the efficacy of the nano-level dispersion is electrochemically verified in terms of high single-cell performance and further extended life time as a result of a synergistic effect of improved proton conductivity, reduced methanol permeability and excellent hydrolytic durability.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 공과대학 > 서울 에너지공학과 > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.