| DOI | Resolve DOI: https://doi.org/10.1002/celc.201402251 |
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| Author | Search for: Zhu, A.L.; Search for: Duch, D.; Search for: Roberts, G.A.; Search for: Li, S.X.X.1; Search for: Wang, H.2; Search for: Duch, K.; Search for: Bae, E.; Search for: Jung, K.S.; Search for: Wilkinson, D.; Search for: Kulinich, S.A. |
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| Affiliation | - National Research Council of Canada. NRC Institute for Fuel Cell Innovation
- National Research Council of Canada. Energy, Mining and Environment
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| Format | Text, Article |
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| Subject | Alkaline fuel cells; Electrolytes; Fuel cells; Hydrated lime; Scavenging; Zinc oxide; Discharge capacities; Effective approaches; Optimal performance; Theoretical approach; Water compensation; Zinc air fuel cells; Zincates; Calcium |
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| Abstract | The use of calcium hydroxide for scavenging zincate species is demonstrated to be a highly effective approach for increasing the electrolyte capacity and improving the performance of the zinc-air fuel cell system. A fundamental approach is established in this study to quantify the formation of calcium zincate as the product of scavenging and the amount of water compensation necessary for optimal performance. The good agreement between predicted and experimental results proves the validity of the proposed theoretical approach. By applying the results of theoretical predictions, both the electrolyte capacity and the cell longevity have been increased by more than 40%. It is also found that, using Ca(OH)2 to scavenge zincate species in concentrated KOH solutions, affects mostly the removal of zincate, rather than ZnO, from the electrolyte, whereas the presence of excess, free, mobile H2O plays a key role in dissolving ZnO and forming zincate. The results obtained in this study demonstrate that the proposed approach can widely and effectively be applied to all zinc-air cell systems during their discharge cycle. |
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| Publication date | 2015 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21276910 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | f9113253-c5eb-4fa4-a0e2-2feb428b1d1d |
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| Record created | 2015-11-10 |
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| Record modified | 2020-04-22 |
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