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Cho, Jaephil
Nano Energy Storage Materials Lab (NESM)
Research Interests
  • Li-ion battery, metal-air battery, redox-flow battery, flexible battery .

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Temperature Dependence of the Oxygen Reduction Mechanism in Nonaqueous Li-O2 Batteries

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Title
Temperature Dependence of the Oxygen Reduction Mechanism in Nonaqueous Li-O2 Batteries
Author
Liu, BinXu, WuZheng, JianmingYan, PengfeiWalter, Eric D.Isern, NancyBowden, Mark E.Engelhard, Mark H.Kim, Sun TaiRead, JdffreyAdams, Brian D.Li, XiaolinCho, JaephilWang, ChongminZhang, Ji-Guang
Issue Date
201711
Publisher
AMER CHEMICAL SOC
Citation
ACS ENERGY LETTERS, v.2, no.11, pp.2525 - 2530
Abstract
The temperature dependence of the oxygen reduction mechanism in nonaqueous Li-O2 batteries is investigated within the temperature range of -20 to 40 °C. The discharge capacity of the Li-O2 battery first decreases from 7492 mAh g-1 at 40 °C to 2930 mAh g-1 at 0 °C and then increases sharply with a further decrease in temperature and reaches a very high capacity of 17 716 mAh g-1 at -20 °C at 0.1 mA cm-2. The lifetime of superoxide intermediates and the solution pathway were found to play a dominant role in the discharge of the Li-O2 battery in the temperature range of -20 to 0 °C, but the electrochemical kinetics of oxygen reduction and the surface pathway dominate the discharge behavior of the Li-O2 batteries between 0 and 40 °C. This work will broaden the fundamental understanding of the oxygen reduction process in the Li-O2 battery, especially at different temperatures.
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DOI
http://dx.doi.org/10.1021/acsenergylett.7b00845
ISSN
2380-8195
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