摘要： We report herein the preparation of porous CaMnO 3 microspheres and their electrochemical catalytic performance as a cathode for rechargeable sodium-oxygen (Na-O 2 ) batteries. In ether-based electrolytes, the CaMnO 3 /C cathode exhibits a high discharge capacity of 9560 mA h g −1 at a current density of 100 mA g −1 , high rate capability (a capacity of 1940 mA h g −1 at 1000 mA g −1 ), and considerable cyclability up to 80 cycles. Two discharged species of NaO 2 and Na 2 O 2 are detected at the discharged state. The remarkable electrocatalytic activity of CaMnO 3 both for the oxygen reduction reaction (ORR) and for the oxygen evolution reaction (OER) is attributed to the porous micro-nanostructures in stable ether-based electrolytes. The porous micro-nanostructured CaMnO 3 electrode delivered a high specific capacity, high rate capacity and enhanced cyclability in rechargeable sodium-oxygen batteries. 出版日期： 2015-02-03 資源來源： Royal Society of Chemistry 識別號： ISSN: 2050-7488 識別號： EISSN: 2050-7496 識別號： DOI: 10.1039/c4ta06287f
