Method for preparing cathode material of hollow spherical copper phosphide lithium battery

Abstract

The invention discloses a method for preparing a cathode material of a hollow spherical copper phosphide (Cu3P) nano micrometer lithium battery. The method comprises the following steps: adding deionized water into a high-pressure reaction kettle, adding copper salt, stirring till the components are completely dissolved, further adding EDTA (Ethylene Diamine Tetraacetic Acid) sodium salt and PEG -10000, stirring till the components are completely dissolved, transferring the obtained transparent solution into a polytetrafluoroethylene lining, further adding yellow phosphorus, subsequently sealing the polytetrafluoroethylene lining into a stainless steel mold, heating to react at room temperature under the sealed condition, after the reaction, cooling the components to be the room temperature along with the furnace, subsequently filtering by using a piece of rapid quantitative filter paper so as to obtain a crude product, respectively washing by using deionized water, benzene and absolute ethyl alcohol in sequence, putting the washed product into a vacuum drying oven to dry in vacuum so as to obtain the hollow spherical copper phosphide cathode material. The method is low in cost, simple in preparation process, good in repeatability and good in application prospect, and the raw materials are easy to obtain.

Description

Technical field [0001] The invention relates to the technical field of preparation of lithium ion battery negative electrode materials, in particular to a method for preparing hollow spherical cuprous phosphide lithium battery negative electrode materials. Background technique [0002] With the gradual exhaustion of major natural resources such as coal and oil, renewable energy sources such as solar and wind have developed rapidly in recent years. The development of these new energy sources not only increases the demand for energy storage batteries, but also puts forward higher requirements for the performance of chemical power sources. As a new type of energy storage battery, lithium-ion battery has the characteristics of large specific capacity, light weight, high voltage, and good safety. Therefore, it is widely used in many digital devices such as electric vehicles, mobile phones, and notebook computers. Although compared with lithium metal, commercial carbon anode materials...

AI Technical Summary

Problems solved by technology

Although compared with metal lithium, commercial carbon anode materials have greatly improved in terms of safety performance and cycle performance, but there are still many shortcomings: low theoretical capacity (372mA·h / g), lithium ions in carbon materials Diffusion is slow, and the potential of lithium intercalation is similar to that of metal lithium electrodes. When charging with high current, lithium dendrites are easy to form on the electrode surface, which poses a safety hazard.

However, the existing production process has disadvantages such as high cost of raw materials and equipment, and irregular product particles.

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