Journal
NANO LETTERS
Volume 13, Issue 6, Pages 2971-2975Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl401439b
Keywords
Lithium-air cell; temperature; electrochemical process
Categories
Funding
- Human Resources Development program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) [20124010203310]
- Korea government Ministry of Trade, Industry and Energy
- National Research Foundation of Korea (NRF)
- Korea government (MEST) [2009-0092780]
- Regione Lazio project, Italy
- Korea Evaluation Institute of Industrial Technology (KEIT) [20124010203310] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this Letter we report an electrochemical and morphological study of the response of lithium-oxygen cells cycled at various temperatures, that is, ranging from -10 to 70 degrees C. The results show that the electrochemical process of the cells is thermally influenced in an opposite way, that is, by a rate decrease, due to a reduced diffusion of the lithium ions from the electrolyte to the electrode interface, at low temperature and a rate enhancement, due to the decreased electrolyte viscosity and consequent increased oxygen mobility, at high temperature. In addition, we show that the temperature also influences the crystallinity of lithium peroxide, namely of the product formed during cell discharge.
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