File Download
Supplementary
-
Citations:
- Appears in Collections:
postgraduate thesis: Aluminum/air electrochemical cells
Title | Aluminum/air electrochemical cells |
---|---|
Authors | |
Issue Date | 2014 |
Publisher | The 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. |
Abstract | Aluminum (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. |
Degree | Doctor of Philosophy |
Subject | Electric batteries |
Dept/Program | Mechanical Engineering |
Persistent Identifier | http://hdl.handle.net/10722/233926 |
HKU Library Item ID | b5793621 |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Wang, Lei | - |
dc.contributor.author | 王雷 | - |
dc.date.accessioned | 2016-10-07T01:44:33Z | - |
dc.date.available | 2016-10-07T01:44:33Z | - |
dc.date.issued | 2014 | - |
dc.identifier.citation | Wang, L. [王雷]. (2014). Aluminum/air electrochemical cells. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. | - |
dc.identifier.uri | http://hdl.handle.net/10722/233926 | - |
dc.description.abstract | Aluminum (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.language | eng | - |
dc.publisher | The University of Hong Kong (Pokfulam, Hong Kong) | - |
dc.relation.ispartof | HKU Theses Online (HKUTO) | - |
dc.rights | The author retains all proprietary rights, (such as patent rights) and the right to use in future works. | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject.lcsh | Electric batteries | - |
dc.title | Aluminum/air electrochemical cells | - |
dc.type | PG_Thesis | - |
dc.identifier.hkul | b5793621 | - |
dc.description.thesisname | Doctor of Philosophy | - |
dc.description.thesislevel | Doctoral | - |
dc.description.thesisdiscipline | Mechanical Engineering | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.5353/th_b5793621 | - |
dc.identifier.mmsid | 991020702129703414 | - |