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postgraduate thesis: Aluminum/air electrochemical cells

TitleAluminum/air electrochemical cells
Authors
Issue Date2014
PublisherThe University of Hong Kong (Pokfulam, Hong Kong)
Citation
Wang, L. [王雷]. (2014). Aluminum/air electrochemical cells. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR.
AbstractAluminum (Al) is a very promising energy carrier given its high capacity and energy density, low cost, earth abundance and environmental benignity. The Al/air battery as a kind of metal/air electrochemical cell attracts tremendous attention. Traditional Al/air batteries suffer from the self-corrosion and related safety problems. In this work, three new approaches were investigated to tackle these challenges and to develop high-performance Al/air cells: (1) incorporate an additional hydrogen/air fuel cell to utilize the hydrogen from the parasitic reaction; (2) utilize organic alkaline anolyte instead of aqueous one in a dual- or tri- electrolyte membrane fuel cell; (3) integrate the microfluidic fuel cell structure into the Al/air battery. The self-corrosion reaction is either turned into a beneficial reaction or significantly inhibited through these approaches. Moreover, the Al/air cells exhibited improved current and/or voltage performance. With an alkaline anolyte and an acidic catholyte, the cell exhibited an open-circuit voltage of 2.2 V, the highest value so far reported. The capacity and energy density of the Al/air battery increased over 20 folds when conventional aqueous electrolyte was replaced with the selected organic electrolyte. The adoption of microfluidic fuel cell concept effectively miniaturized the Al/air cell, eliminated the self-corrosion during battery stand-by, and led to a higher current and power output than membrane-based cells due to reduced cell resistance. Overall, Al/air electrochemical cells with better performance and higher feasibility were developed based on the above three approaches, when they are used alone or collectively.
DegreeDoctor of Philosophy
SubjectElectric batteries
Dept/ProgramMechanical Engineering
Persistent Identifierhttp://hdl.handle.net/10722/233926

 

DC FieldValueLanguage
dc.contributor.authorWang, Lei-
dc.contributor.author王雷-
dc.date.accessioned2016-10-07T01:44:33Z-
dc.date.available2016-10-07T01:44:33Z-
dc.date.issued2014-
dc.identifier.citationWang, L. [王雷]. (2014). Aluminum/air electrochemical cells. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR.-
dc.identifier.urihttp://hdl.handle.net/10722/233926-
dc.description.abstractAluminum (Al) is a very promising energy carrier given its high capacity and energy density, low cost, earth abundance and environmental benignity. The Al/air battery as a kind of metal/air electrochemical cell attracts tremendous attention. Traditional Al/air batteries suffer from the self-corrosion and related safety problems. In this work, three new approaches were investigated to tackle these challenges and to develop high-performance Al/air cells: (1) incorporate an additional hydrogen/air fuel cell to utilize the hydrogen from the parasitic reaction; (2) utilize organic alkaline anolyte instead of aqueous one in a dual- or tri- electrolyte membrane fuel cell; (3) integrate the microfluidic fuel cell structure into the Al/air battery. The self-corrosion reaction is either turned into a beneficial reaction or significantly inhibited through these approaches. Moreover, the Al/air cells exhibited improved current and/or voltage performance. With an alkaline anolyte and an acidic catholyte, the cell exhibited an open-circuit voltage of 2.2 V, the highest value so far reported. The capacity and energy density of the Al/air battery increased over 20 folds when conventional aqueous electrolyte was replaced with the selected organic electrolyte. The adoption of microfluidic fuel cell concept effectively miniaturized the Al/air cell, eliminated the self-corrosion during battery stand-by, and led to a higher current and power output than membrane-based cells due to reduced cell resistance. Overall, Al/air electrochemical cells with better performance and higher feasibility were developed based on the above three approaches, when they are used alone or collectively.-
dc.languageeng-
dc.publisherThe University of Hong Kong (Pokfulam, Hong Kong)-
dc.relation.ispartofHKU Theses Online (HKUTO)-
dc.rightsThe author retains all proprietary rights, (such as patent rights) and the right to use in future works.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subject.lcshElectric batteries-
dc.titleAluminum/air electrochemical cells-
dc.typePG_Thesis-
dc.identifier.hkulb5793621-
dc.description.thesisnameDoctor of Philosophy-
dc.description.thesislevelDoctoral-
dc.description.thesisdisciplineMechanical Engineering-
dc.description.naturepublished_or_final_version-

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