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A Hybrid Aluminum/Hydrogen/Air CellmCommon Cathode

Journal of Energy and Power Engineering 2014年第11期8卷 1889-1894页

作者： Lei Wang Fude Liu Wentao Wang Dawei Zheng Huizhi Wang michael kow-hi leung Department of Mechanical Engineering The University of Hong Kong Hong Kong China School of Energy and Environment The City University of Hong Kong Hong Kong China SINANO (Suzhou Institute of Nano-Tech and Nano-Bionics) Chinese Academy of Sciences Suzhou 215123 China

Metal/Air batteries are considered to be promising electricity storage devices given their compactness, environmental benignity and affordability. As a commonly available metal, aluminum has received great attention since its first use as an anode in a battery. Its high specific energy （even better volumetric energy density than lithium） makes it ideal for many primary battery applications. However, the development of A1/Air cell with alkaline electrolyte has been lagged behind mainly due to the unfavorable parasitic hydrogen generation. Herein, we designed and constructed a novel A1/H_2/Air tandem fuel cell to turn the adverse parasitic reaction into a useful process. The system consists of two anodes, namely, aluminum and hydrogen, and one common air-breathing cathode. The aluminum acts as both the anode for the A1/Air sub-cell and the source to generate hydrogen for the hydrogen/air sub-cell. The aluminum/air sub-cell has an open circuit voltage of 1.45 V and the H_2/Air sub-cell of 0.95 V. We demonstrated that the maximum power output of aluminum as a fuel was largely enhanced by 31% after incorporating the H_2/Air sub-cell with the tandem concept. In addition, a passive design was utilized in our tandem system to eliminate the dependence on auxiliary pumping sub-systems so that the whole system remained neat and eliminated the dependence of energy consuming pumps or heaters which were typically applied in micro fuel cells.

关键词： Al/Air battery hydrogen fuel cell passive fuel cell utilization efficiency tandem fuel cell.

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