Wang, Manxiang Liu, Guicheng Tian, Zhe Shao, Yingna Wang, Lei Yee, Feng Tran, Minh Xuan Yun, Yanbin Lee, Joong Kee 2024-01-20T00:32:44Z 2024-01-20T00:32:44Z 2021-09-04 2017-09-15 0196-8904 https://pubs.kist.re.kr/handle/201004/122281 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. (C) 2017 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD NAFION COMPOSITE MEMBRANE ANODE CATALYST LAYER 3-ELECTRODE SYSTEM HIGH-TEMPERATURE OPTIMIZATION CATHODE DMFC TECHNOLOGY OPERATION CROSSOVER Microstructure-modified proton exchange membranes for high-performance direct methanol fuel cells Article 10.1016/j.enconman.2017.06.020 1 ENERGY CONVERSION AND MANAGEMENT, v.148, pp.753 - 758 ENERGY CONVERSION AND MANAGEMENT 148 753 758 scie scopus 000410010000061 2-s2.0-85021111507 Thermodynamics Energy & Fuels Mechanics Thermodynamics Energy & Fuels Mechanics Article NAFION COMPOSITE MEMBRANE ANODE CATALYST LAYER 3-ELECTRODE SYSTEM HIGH-TEMPERATURE OPTIMIZATION CATHODE DMFC TECHNOLOGY OPERATION CROSSOVER Direct methanol fuel cells Proton exchange membranes Microstructure-modification Proton conductivity Structural stability