Synthesis and characterization of a crosslinked membrane based on sulfonated poly(aryl ether sulfone) and sulfonated pol
- PDF / 2,534,189 Bytes
- 13 Pages / 595.276 x 790.866 pts Page_size
- 13 Downloads / 174 Views
ORIGINAL PAPER
Synthesis and characterization of a crosslinked membrane based on sulfonated poly(aryl ether sulfone) and sulfonated polyvinyl alcohol applied in direct methanol fuel cells Chengyun Yuan1 · Yinghan Wang1 Received: 9 March 2020 / Accepted: 25 September 2020 © The Polymer Society, Taipei 2020
Abstract Vinyl-terminated sulfonated poly (arylene ether sulfone) (VSPAES) and sulfonated polyvinyl alcohol containing vinyl group (VSPVA) have been prepared. The VSPVA and VSPAES were crosslinked by adding AIBN as initiator. The results of FT-IR and 1H-NMR indicated the existence of sulfonic acid groups and crosslinked structure in these crosslinked membranes. The microphase structures of the membranes are analyzed by SEM. The proton conductivities of membranes were above 10 mS cm−1, which indicated that it basically meet the needs of fuel cells. The methanol permeability coefficients of CSPAES membrane is 2.8 × 10–7 cm2 s−1, remarkably lower than neat SPAES (8.5 × 10–7 cm2 s−1) and Nafion117 (14.1 × 10–7 cm2 s−1). Moreover, the proton selecticity of CSPAES membrane is close to 2 times higher than that of Nafion 117 membrane. The crosslinked membrane showed better stability than the linear SPAES membrane. Keywords Sulfonated poly (arylene ether sulfone) · Free radical reaction · Sulfonated polyvinyl alcohol · Methanol permeability · Direct methanol fuel cells
Introduction With the development of human civilization, the demand for energy was increasing day by day, but in the process of using these non-renewable energy sources, the environment was inevitably polluted. So, the renewable energy sources were receiving more and more attention [1]. Nowadays, wind energy, geothermal energy and solar energy had been put into use, but they were affected by environmental and climatic factors, and it was difficult to maintain the continuity and stability during use [2]. Therefore, the development a kind of energy storage system, which had higher energy conversion efficiency, larger storage capacity and lower price had become the key for the development of renewable energy [3]. Fuel cells were receiving more and more attention because it could convert chemical energy into electrical energy to supply load equipment through the redox reaction * Yinghan Wang [email protected] 1
State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, PR China
of positive and negative electrodes. As fourth-generation power generation device, the fuel cell can perform efficient energy storage and conversion. It had a wide range of fuel sources and could use hydrogen, methanol, ethanol, etc. as fuel. It was expected to achieve low pollution or zero emissions [4]. Proton exchange membrane fuel cells (PEMFC) was getting more and more attentions as a renewable energy source. Among them, the direct methanol fuel cell was widely used in automobiles, home appliances, aerospace and other fields [5]. PEM was one of the key materials of fuel cells used to conduct pro
Data Loading...
