Preparation method of nanometer ZnO for lithium ion battery cathode material

Abstract

The invention discloses a preparation method of nanometer ZnO for a lithium ion battery cathode material. The concrete preparation method comprises the steps of placing zinc acetate in a muffle furnace with a temperature raising procedure; starting the muffle furnace; raising the room temperature to be the preset temperature ranged from 500 to 800 DEG C, wherein the temperature raising speed is ranged from 3 to 5 DEG C / min; keeping warm at the preset temperature ranged from 500 to 800 DEG C for 2 to 10 hours; then taking out; cooling to the room temperature; and obtaining the nanometer ZnO for the lithium ion battery cathode material. The prepared ZnO has excellent electrochemical cycling stability, the preparation method of the nanometer ZnO for the lithium ion battery cathode material is simple, the reaction conditions can be easily reached, and the nanometer ZnO is suitable to be prepared on a large scale.

Description

technical field [0001] The invention relates to a preparation method of a lithium ion battery negative electrode material, in particular to a preparation method of nanometer ZnO used in a lithium ion battery negative electrode material, and belongs to the field of electrochemical power sources. Background technique [0002] With the rapid development of emerging economies, global energy consumption has increased dramatically. Lithium-ion batteries have been widely used in portable electronic devices such as computers, cameras, and mobile phones due to their high voltage, high energy density, long cycle life, good safety performance, and low cost. In recent years, countries around the world are actively carrying out research on the application of lithium-ion batteries to hybrid electric vehicles (HEV), pure electric vehicles (PEV), etc., but the main bottleneck of lithium-ion batteries as vehicle power batteries is the negative electrode materials of lithium-ion batteries. p...

AI Technical Summary

Problems solved by technology

However, ZnO has disadvantages such as poor cycle performance and rapid attenuation.

Chinese patent CN105336935A discloses a preparation method and application of a ZnO-Graphene lithium-ion battery. The steps include the preparation of graphite oxide, the preparation of ZnO by hydrothermal method, the hydrothermal synthesis method of ZnO / RGO, etc., and the compounding of graphene can Improve ZnO cycle performance, but the ZnO-Graphene negative electrode material made by this method is only 307.3mAh / g in the 40th cycle at a current density of 40mA / g, and the capacity is low, and the process steps of this method are complicated, so it is not suitable for large mass production

Images