Mn2O3微纳米粉体的配合物热解制备与电化学性质

摘要

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 、TGDTA、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-1 Na2SO4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3000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(H2O)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.Mn2O3 sub-micron powder was then prepared 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 electrode material for supercapacitors,the prepared Mn2O3 electrode shows a strong cycle stability in 0.5 mol ·g-1 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).