dc.contributor.advisor |
Kim, Youngsik |
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dc.contributor.author |
Sahgong, Sun Hye |
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dc.date.accessioned |
2024-01-24T16:57:59Z |
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dc.date.available |
2024-01-24T16:57:59Z |
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dc.date.issued |
2016-02 |
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dc.description.abstract |
Metal-air batteries are promising alternatives to the state-of-the-art Li-ion batteries owing to their high theoretical energy density. This thesis reports for the first time, a rechargeable aqueous Na-air battery, in which a Na-ion conducting ceramic separator (Na3Zr2Si2PO12) and carbon paper coated with carbon black (Vulcan) or Pt/C nanoparticles were used as a solid electrolyte and air-electrode, respectively. The Na-air cells with the air-electrode consisting of Vulcan- or Pt/C-coated carbon papers exhibited excellent rechargeability with small charge-discharge voltage gaps (voltage efficiency of 84.8 % and 97.6 %, respectively) over 18 cycles (total 180 h), compared to the cell with only the carbon paper electrode (79.0 %). These results are expected to pave the way for more cost-effective Na-air batteries with high energy density. |
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dc.description.degree |
Master |
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dc.description |
Department of Energy Engineering |
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dc.identifier.uri |
https://scholarworks.unist.ac.kr/handle/201301/72020 |
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dc.identifier.uri |
http://unist.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002236140 |
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dc.language |
eng |
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dc.publisher |
Ulsan National Institute of Science and Technology (UNIST) |
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dc.rights.embargoReleaseDate |
9999-12-31 |
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dc.rights.embargoReleaseTerms |
9999-12-31 |
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dc.subject |
Aqueous Na-air battery, Ceramic separator, Electrocatalysts, Voltage efficiency |
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dc.title |
Rechargeable aqueous Na-air battery & Seawater battery: Highly improved Voltage efficiency by catalysts |
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dc.type |
Thesis |
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