Lithium battery positive body employing aluminum phosphate foam glass as current collector and preparation method

Abstract

The invention provides a lithium battery positive body employing aluminum phosphate foam glass as a current collector and a preparation method. The method comprises the steps of carrying out colloidal reaction on a precursor of a positive material for a lithium battery in flake aluminum phosphate foam glass and sintering to form a novel positive body employing the aluminum phosphate foam glass as the current collector. The novel positive body is different from the positive body formed by coating the current collectors, such as aluminum foil with different positive materials, and is a novel positive body formed by reacting the precursor of the positive material in glass foam cells and sintering into a whole, and the novel positive body has good micro-elasticity, and can be directly cut and assembled, and an adhesive does not need to be added in use. The lithium battery positive body has the significant effects that the adhesive and the aluminum foil for preparing a positive plate are reduced and relatively high energy density is ensured. The positive material is stabilized by the foam glass micro-elasticity of a lattice structure in the charge and discharge processes to prevent collapse of the lattice structure, and the cycle life of a positive electrode of the lithium battery is effectively prolonged.

Description

technical field [0001] The invention belongs to the field of lithium ion battery materials, and in particular relates to a lithium battery anode body using aluminum phosphate foam glass as a current collector and a preparation method thereof. Background technique [0002] Lithium-ion battery, as a new generation of green high-energy rechargeable battery, has achieved rapid development in the past 20 years due to its outstanding advantages such as high voltage, high energy density, good cycle performance, small self-discharge and environmental friendliness since it came out in 1990. It is widely used as the power source of precious and heavy household appliances such as mobile phones, portable computers, video cameras, cameras, etc. At present, the cathode materials of lithium-ion batteries mainly include lithium cobalt oxide, lithium iron phosphate, and high-nickel cathode materials. Lithium-ion battery is the battery with the highest voltage and the largest energy density a...

AI Technical Summary

Problems solved by technology

However, the above-mentioned method of coating the positive electrode active material with aluminum phosphate cannot be easily applied to the treatment of lithium-ion battery current collectors.