Mn_2O_3微纳米粉体的配合物热解制备与电化学性质(英文)

Mn_2O_3 Sub-Micron Powder: Preparation via Complex Thermolysis Route and Electrochemical Properties

利用液相扩散法制备了异烟酸锰超分子配合物,通过将其在空气中高温煅烧制备了Mn2O3微纳米粉体。利用FTIR、TG-DTA、XRD、TEM和FESEM对产物进行了表征。电化学测试表明,Mn2O3微纳米粉体在0.5 mol.L-1Na2SO4电解液中表现出良好的电化学电容特性,在电流密度为0.5 A.g-1时其单电极比容量可达到88 F.g-1,循环3 000次后容量保持率可达到80%。

This report describes a facile preparation and electrochemical properties of Mn2O3 sub-micron powder via thermal decomposition of an isonicotinic acid manganese complex. An isonicotinic acid manganese complex of [Mn（INA）2（H20）4]n （INA=isonicotinic acid） was synthesized by liquid diffusion method using an aqueous solution of manganese acetate and isonicotinic acid as the raw material. Mn203 sub-micron powder was then pre- pared by solid-state thermolysis of the as-synthesized INA-Mn complex at higher temperature under atmospheric pressure. The obtained products were characterized by FTIR, TG-DTA, XRD, TEM and FESEM. As an elec- trode material for supercapacitors, the prepared Mn203 electrode shows a strong cycle stability in 0.5 mol .g-~ Na2SO4 electrolyte and a specific capacitance of 88 F·g-^-1 at a current density of 0.5 A·g^-1 vs. the saturated calomel electrode （SCE）.