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A hybrid aluminum/hydrogen/air cell system |
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| Authors: | Lei Wang Wentao Wang Guandong Yang Dong Liu Jin Xuan Huizhi Wang Michael KH Leung Fude Liu |
| Affiliation: | 1. Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, China;2. Ability R&D Energy Research Centre, School of Energy and Environment, City University of Hong Kong, Hong Kong, China;3. School of Mechanical and Power Engineering, East China University of Science and Technology, China;4. Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou 215123, China |
| Abstract: | A hybrid aluminum/hydrogen/air cell system is developed to solve the parasitic hydrogen-generating problem in an alkaline aluminum/air battery. A H2/air fuel cell is integrated into an Al/air battery so that the hydrogen generated by the parasitic reaction is utilized rather than wasted. A systematic study is conducted to investigate how the parasitic reaction and the added H2/air cell affect the performance of the aluminum/air battery. The aluminum/air sub-cell has an open circuit voltage of 1.45 V and the hydrogen/air sub-cell of 1.05 V. The maximum power density of the entire hybrid system increases significantly by ∼20% after incorporating a H2/air sub-cell. The system maximum power density ranges from 23 to 45 mW cm−2 in 1–5 M NaOH electrolyte. The hybrid system is adaptable in concentrated alkaline electrolyte with significantly improved power output at no sacrifice of its overall efficiency. |
| Keywords: | Aluminum air battery Hydrogen air fuel cell Hybrid cell system Passive fuel cell Parasitic self-corrosion reaction Membraneless fuel cell |
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