Preparation method of cobalt-manganese composite oxide nanoparticles and cobalt-manganese composite oxide nanoparticles prepared by adopting same

Abstract

The invention provides a preparation method of cobalt-manganese composite oxide nanoparticles and the application of the cobalt-manganese composite oxide nanoparticles prepared by adopting the method in a lithium ion battery. The corresponding method comprises the steps that a predetermined amount of manganese acetate and polyvinylpyrrolidone are dissolved in water and an ethanol solution, and a manganese acetate and polyvinylpyrrolidone solution is obtained; under a predetermined temperature condition, a cobalt potassium cyanate solution is dropwise added into the manganese acetate and polyvinylpyrrolidone solution, is magnetically stirred and then stands still for predetermined time, and cobalt cyanic acid radical complex nanoparticles are obtained through centrifugal separation; and the dried cobalt cyanic acid radical complex nanoparticles are calcined in air for predetermined time at a calcination temperature of 400 DEG C, and the cobalt-manganese composite oxide nanoparticles are obtained after the calcination. According to the preparation method, higher temperature and longer reaction time are not needed, the shapes and the structures of the particles are easy to control, the manufacturing process is relatively simple, the requirement for equipment is not high, and large-scale popularization and application can be realized.

Description

technical field

[0001] The invention belongs to the technical field of nanomaterial preparation, in particular to a method for preparing cobalt-manganese composite oxide nanoparticles and the cobalt-manganese composite oxide nanoparticles prepared by the method. Background technique

[0002] Cobalt-manganese composite oxide is a new type of material with a wide range of uses. Because it contains two different metal ions and has a special spinel crystal structure, it is widely used in magnetism, electronics, catalysis, energy conversion and storage, etc. have great application prospects. In the prior art, MnCo has been prepared by heating at 800 °C for 24 hours using the sol-gel method 2 o 4 material, and the material still has 450mAh g after 50 cycles when it is used as a lithium-ion battery anode -1 The capacity shows better performance; in the prior art, CoMn with good electrocatalytic performance can also be synthesized at room temperature by using the liquid phase syn...

Images