Novel Flow Field with Superhydrophobic Gas Channels Prepared by One-step Solvent-induced Crystallization for Micro Direct Methanol Fuel Cell
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- 作者：Junsheng Liang ; Kuanyao Liu ; Shouzuo Li ; Dazhi Wang ; Tongqun Ren…
- 关键词：Fuel cell ; Flow field ; Superhydrophobic ; Solvent ; induced crystallization
- 刊名：Nano-Micro Letters
- 出版年：2015
- 出版时间：April 2015
- 年：2015
- 卷：7
- 期：2
- 页码：165-171
- 全文大小：887KB
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22.I. Saarikoski, M. Suvanto, T.A. Pakkanen, Modificatio - 作者单位：Junsheng Liang (1)
Kuanyao Liu (1)
Shouzuo Li (1)
Dazhi Wang (2)
Tongqun Ren (1)
Xiaoying Xu (1)
Ying Luo (1)
1. Key Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian, 116023, Liaoning, People’s Republic of China
2. Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian, 116023, Liaoning, People’s Republic of China - 刊物类别：Nanotechnology and Microengineering; Nanotechnology; Nanoscale Science and Technology;
- 刊物主题：Nanotechnology and Microengineering; Nanotechnology; Nanoscale Science and Technology;
- 出版者：Springer Berlin Heidelberg
- ISSN：2150-5551
文摘
The CO2-induced capillary blocking in anode flow field is one of the key adverse factors to reduce the performance of a micro-direct methanol fuel cell (μDMFC). In order to solve this problem, new polycarbonate (PC) flow field plates with nested arrangement of hydrophilic fuel channels and superhydrophobic gas channels were designed, fabricated, and tested in this work. The gas channels were treated with solvent-induced crystallization using acetone solution. The superhydrophobicity with 160° water contact angle and 2° tilting angle was obtained on the PC substrates. A dummy cell using hydrogen peroxide decomposition reaction and a test loop were separately set up to evaluate the flow fields-performance. It was found that a 37 % pressure drop decrease can be obtained in the new serpentine flow field compared with that of the conventional one. The benefit of the new flow field to remove gas bubbles was also confirmed by an in situ visualization study on the dummy cell. Results show that the auxiliary superhydrophobic gas channels can speed up the discharge of the gas bubbles from the flow field, which will in turn improve the μDMFC performance. Keywords Fuel cell Flow field Superhydrophobic Solvent-induced crystallization