Method for preparing lithium battery anode

Abstract

The invention belongs to the battery technology field, and more particularly relates to a preparation method of the anode of a lithium battery; the preparation method comprises the following steps: sheet metals with smooth surfaces are cut into round pieces which are washed with acetone by ultrasonic, then washed with distilled water by ultrasonic and dried after being taken out; the processed sheet metals are placed into a vacuum cavity of a chemical vapor deposition device, use carrier gas to carry liquid carbon sources containing sulfur to the vacuum cavity in reaction so as to lead the carbon sources containing sulfur to carry out pyrolysis, an active group obtained after pyrolysis is deposited on the processed sheet metals and a sulfocarbon composite material can be obtained; the prepared sulfocarbon composite material is cooled naturally to room temperature in the chemical vapor deposition device and then the anode of the lithium battery can be obtained. The invention has the following advantages that the preparation method integrates the preparation of the anode materials and the preparation of the electrode into a whole, completes the preparation of the electrode by one step operation without drying and adding adhesives, provides possibilities for the improvement of the specific capacity of the anode materials and has the advantages of simple technique, time saving and low cost and the like.

Description

Technical field [0001] The invention belongs to the technical field of batteries, and particularly relates to a method for preparing a lithium battery anode. Background technique [0002] In recent years, with the continuous advent of a series of high-tech electronic products such as digital cameras, notebook computers, and hybrid cars, batteries have played an increasingly important role. At the same time, people's requirements for battery performance are getting higher and higher. The theoretical specific capacity of elemental sulfur is 1675mAh / g, and the theoretical specific energy of a battery assembled with lithium can reach 2600Wh / kg, which is much higher than that of lithium-ion batteries and has become the main trend of current battery development. [0003] However, due to the electrical insulation of sulfur, it is impossible to charge and discharge an electrode containing 100% sulfur at room temperature. To make up for this shortcoming, a common solution is to add a larg...

AI Technical Summary

Problems solved by technology

That is, the preparation of the positive electrode material and the preparation of the electrode are divided into two steps. The common disadvantage is that the coated electrode needs to be dried for a long time to prepare the ready-to-use positive electrode. The process is complex, time-consuming, and costly.

In addition, due to the addition of binders during the fabrication process, the specific capacity of the electrode also decreases.