کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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183178 | 459537 | 2016 | 8 صفحه PDF | دانلود رایگان |
Mg–O2 batteries appear to be a promising alternative to Li-O2 system due to the high abundancy and volumetric energy density of Mg. Although much effort has been put into research on Li-O2 batteries, little is known about the oxygen reduction and evolution in Mg2+-containing aprotic electrolytes. In this paper, we present a detailed analysis of the ORR in Mg2+-containing DMSO using RRDE and DEMS-techniques and derive a more general reaction mechanism of ORR in aprotic electrolytes using the results for Li+, Na+ and K+-containing DMSO. O2 first reacts via an initial adsorption step to superoxide which, in the presence of Mg2+, is subsequently reduced to peroxide as the main reaction product. However, this product undergoes further reactions leading to a deactivation of the electrode. Regarding the reversibility, unfortunately no OER was observed and reactivation of the electrode proved difficult.
Journal: Electrochimica Acta - Volume 200, 10 May 2016, Pages 214–221