Microstructure-modified proton exchange membranes for high-performance direct methanol fuel cells

Title
Microstructure-modified proton exchange membranes for high-performance direct methanol fuel cells
Authors
이중기Guicheng LiuManxiang WangZhe TianYingna ShaoLei WangFeng YeMinh Xuan TranYanbin Yun
Keywords
Direct methanol fuel cells; Proton exchange membranes; Microstructure-modification; Proton conductivity; Structural stability
Issue Date
2017-09
Publisher
Energy conversion and management
Citation
VOL 148-758
Abstract
To lower methanol crossover and volume swelling degree, and to improve proton conductivity, a simple hot-mould-modifying method has been introduced to modify Nafion membrane for the direct methanol fuel cell application. To evaluate effect of the modification on properties of the Nafion membrane and fuel cell performance, a series of measurements of membranes and fuel cells have been carried out. The results show that, compared with the normal membrane, the modified Nafion membrane with regular spindle-type groove array possesses higher proton conductivity and methanol diffusion resistance, and 31.9% better dimensional stability, owing to its larger electrical double-layer capacitance come from the higher contact area between electron-electrode and ion electrolyte, and its more compact internal structure. And also, the direct methanol fuel cell based on the modified Nafion membrane shows 13.3% higher discharge power density and better long-time running performance than the normal one. Furthermore, this hot-mould-modifying method could be introduced into doping/coating-modified membranes reported in the current literature to further modify Nafion membranes, because this method is compatible with the current modifications.
URI
http://pubs.kist.re.kr/handle/201004/68045
ISSN
0196-8904
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

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

BROWSE