Single-walled carbon nanotube interlayer modified gas diffusion layers to boost the cell performance of self-humidifying proton exchange membrane fuel cells |
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| Affiliation: | 1. CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;3. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China;1. Department of Mechanical Engineering, King Abdulaziz University, P.O. Box 80204, Jeddah 21589, Saudi Arabia;2. Department of Mechanical Engineering, Faculty of Engineering-Rabigh, King Abdulaziz University, Jeddah 21589, Saudi Arabia;3. Center of Excellence in Desalination Technology, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Saudi Arabia;4. Institute on Membrane Technology (CNR-ITM), via P. Bucci 17/C, 87036 Rende (CS) Italy;5. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China;1. Department of Mechanical Engineering, University of Kashan, P. O. Box: 8731753153, Kashan, Iran;2. Department of Mechanical Engineering, Tafresh University, Tafresh, 39518-79611, Iran;1. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, 100081, China;2. School of Petrochemical Engineering & Environment, Zhejiang Ocean University, Zhoushan 316022, China;1. Department of Physics, University of Gujrat, Gujrat 50700, Pakistan;2. Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;3. Mechanical and Industrial Engineering Department, Abu Dhabi University, Abu Dhabi 59911, United Arab Emirates;4. Chemical Engineering Department, College of Engineering, King Saud University, P.O.Box 800, Riyadh 11421, Saudi Arabia;5. School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea;1. Department of Mechanical Engineering, Panimalar Engineering College, Chennai, India;2. Department of Mechanical Engineering, PSNA College of Engineering and Technology, Dindigul, India;3. Department of Mechanical Engineering, Jain (Deemed-to-be University), Bangalore, India;4. Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan;5. Center for Emerging Contaminants Research, National Sun Yat-Sen University, Kaohsiung 804, Taiwan;6. The International University of Management, Centre for Environmental Studies, Main Campus, Dorado Park Ext 1, Windhoek, Namibia;7. Destinies Biomass Energy and Farming Pty Ltd, P.O. Box 7387, Swakopmund, Namibia;8. Regent Business School, Durban, South Africa |
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| Abstract: | A tradeoff between the low humidity and the high performance remains a key challenge for the proton exchange membrane fuel cell (PEMFC). In this work, a novel self-humidifying gas diffusion layer (GDL) with a single-walled carbon nanotube (SWCNT) nonwoven layer between the gas diffusion substrate and the hydrophobic microporous layer is controllably prepared to elevate the cell performance under dry conditions. The membrane electrode assembly (MEA) with 0.25 mg cm?2 SWCNT loading exhibits a current density of 0.69 A cm?2 at 0.6 V, which is 392.8% higher than that of the counterpart without the SWCNT interlayer at the same relative humidity. Moreover, the SWCNT interlayer with rational pore structure and proper wettability dramatically improves the water retention capacity of MEA, thus enhancing the low-humidity performance of MEA. The structure design of GDL provides an effective strategy for self-humidifying PEMFC control optimization. |
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| Keywords: | Proton exchange membrane fuel cell Gas diffusion layer Single-walled carbon nanotubes Self-humidifying Controlled wettability |
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