Composite anode material, preparation method and application thereof

Abstract

The invention discloses a composite anode material, a preparation method and application thereof. The composite anode material comprises the following raw materials by weight: 31-39 parts of graphitetailings, 3-7 parts of yttrium nitrate, 13-21 parts of chloroplatinic acid, 5-12 parts of epoxy resin E51, 3-7 parts of diethylenetriamine, and 10-20 parts of graphite. The preparation method includes: mixing graphite tailings with yttrium nitrate and performing grinding, then mixing the product with a chloroplatinic acid solution and conducting heating stirring; then adding a diethylenetriamine solution, performing heating stirring, then conducting pumping filtration, washing and drying, then mixing the product with graphite evenly and conducting crushing, then performing mixing with epoxy resin E51, and carrying out calcination. The anode material prepared by the method provided by the invention has good electrochemical performance, can improve the reversible specific capacity, charge and discharge efficiency, cycle performance stability and rate capability of lithium ion batteries, also can achieve recycling of graphite tailings, and has remarkable effect. The preparation process issimple and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a composite negative electrode material and a preparation method and application thereof. Background technique [0002] Compared with traditional lead-acid and nickel-cadmium secondary batteries, lithium-ion batteries have the advantages of high operating voltage, high specific energy, wide operating temperature range, stable discharge, long cycle life, and no memory effect. Energy storage power supplies are widely used in communication equipment, electric tools, aerospace and other fields. [0003] With the continuous advancement of technology, people have put forward higher requirements for lithium-ion batteries. Lithium-ion batteries with high energy density, high rate performance, long cycle life, and high safety factor have gradually become a research hotspot. Graphite is currently the main commercial carbon anode material for lithium-ion batteries. Graphene is also gett...

AI Technical Summary

Problems solved by technology

Graphene is also getting more and more attention, but graphite and graphene are expensive and their applications are limited

Graphite tailings are low in cost, occupy a large amount of ground, damage the land, and are prone to landslides and mudslides. However, the effect of graphite tailings in batteries is too poor to be used directly, and they need to be treated.

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