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Li-Water Battery with Oxygen Dissolved in Water as a Cathode
Kim, Jae-Kwang,Yang, Wei,Salim, Jason,Ma, Chao,Sun, Chunwen,Li, Jianqi,Kim, Youngsik The Electrochemical Society 2014 Journal of the Electrochemical Society Vol.161 No.3
<P>In this work, we demonstrate a lithium-water battery that uses oxygen dissolved in water as a cathode, Sr<SUB>0.95</SUB>Ce<SUB>0.05</SUB>CoO<SUB>3-δ</SUB> (SCCO)-copper nanoparticles as an efficient bifunctional catalyst, and with hybrid electrolytes. The SCCO-Cu composite catalyst exhibits an efficient and stable bifunctional catalytic activity, especially for the OER. The round-trip efficiency of the cell with SCCO-Cu nanoparticles catalyst reaches 84.1%, close to that of the 50% Pt/carbon-black catalyst (87.2%). The improved performance of the SCCO-Cu catalyst can be ascribed to the synergetic effect of SCCO and copper. The preliminary results demonstrate that the rechargeable lithium-water battery with oxygen dissolved in water flow can be achieved with high efficient and low cost oxide catalyst. This can be a good candidate for a large stationary energy storage system (ESS) with a low-cost.</P>