Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 15, Issue 10, Pages 3623-3629Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp43225d
Keywords
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Funding
- Human Resources Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant
- Korea government Ministry of Knowledge Economy [20124010203320]
- Converging Research Center Program through the Ministry of Education, Science and Technology [2012K001267]
- Industrial Strategic Technology Development Program [10038617]
- Ministry of Knowledge Economy (MKE, Korea)
- National Research Foundation of Korea
- Korean Government (MEST) [NRF-2009-0094219]
- Energy Efficiency and Resources R&D program under the Ministry of Knowledge Economy, Republic of Korea [20112020100070]
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Recently, metal-air batteries, such as lithium-air and zinc-air systems, have been studied extensively as potential candidates for ultra-high energy density storage devices because of their exceptionally high capacities. Here, we report such an electrochemical system based on sodium, which is abundant and inexpensive. Two types of sodium-oxygen batteries were introduced and studied, i.e. with carbonate and non-carbonate electrolytes. Both types could deliver specific capacities (2800 and 6000 mA h g(-1)) comparable to that of lithium-oxygen batteries but with slightly lower discharge voltages (2.3 V and 2.0 V). The reaction mechanisms of sodium-oxygen batteries in carbonate and non-carbonate electrolytes were investigated and compared with those of lithium-oxygen batteries.
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