MnO_x-M/AC(M=La,Ce,Co,Ni)氧还原催化材料的制备及性能(英文)

Preparation and Electrochemical Performance of MnO_x-M/AC(M=La, Ce, Co, Ni) Composites as Oxygen Reduction Catalyst Used in Zinc-air Battery

用热解法制备了掺杂La、Ce、Co、Ni等元素的氧还原催化材料MnOx/AC,并采用XRD和电化学方法对所制备材料的性质和电化学反应性能进行了表征。结果表明,掺杂适量的La、Ce、Co和Ni等元素可改善电极的氧还原反应性能。掺杂La和Co元素的MnOx/AC氧催化还原性能最好,其中,在50mA/cm2的电流条件下,使用这两种掺杂材料所制备的模拟锌-空气电池的放电电压分别为1.1236V和1.1246V。

Oxygen reduction catalyst of MnOx/AC doped with La, Ce, Co, Ni were prepared with thermal decomposition method, and their characteristic and electrochemical performance were investigated by XRD and linear polarization method. Results show that MnOx/ AC doped with appropriate amount of La, Ce, Co and Ni, respectively, could improve catalytic activity towards oxygen reduction, and those doped with La and Co are slightly more active than the others. The discharge voltages of the simulative zinc-air batteries fabricated with MnOx-M/AC （M = La, Co） are 1. 1236V and 1. 1246V respectively under the discharge current of 50 mA/cm^2.