Process for preparing nickel-cobalt-aluminum electrode material by recovering nickel from manganese-cobalt-nickel slag

Abstract

The invention discloses a technology for preparing a nickel-cobalt-aluminum electrode material through recovering nickel from manganese-cobalt-nickel slag. The technology comprises the following steps: adding lithium nitrate and aluminum nitrate to a nickel sulfate and cobalt sulfate mixed solution, adding a micelle growth inhibitor, adding a linear polymer material, and uniformly stirring to obtain a precursor sol; and concentrating the sol, carrying out double stick thread throwing, and calcining to obtain a carbon-containing nickel-cobalt-aluminum ternary positive electrode material. The technology has the characteristics of simplicity, low cost, and good performances of the above obtained product.

Description

technical field [0001] The invention relates to a battery electrode manufacturing technology, in particular to a preparation method of a nickel-cobalt-aluminum electrode material for a lithium battery. Background technique [0002] Lithium-ion batteries (lithium batteries) use carbon materials instead of metal lithium as the negative electrode, which avoids the safety problems of using metal lithium. It is known as a new generation of green batteries. It has high capacity, good safety, good cycle performance, and no memory effect. and pollution-free etc. Cathode material is one of the key materials for manufacturing lithium batteries, accounting for more than 25% of the battery cost, and its performance directly affects various performance indicators of the battery, occupying a core position in lithium batteries. At present, the anode materials for lithium batteries that have been industrialized mainly include lithium cobalt oxide, modified lithium manganese oxide, ternary ...

AI Technical Summary

Problems solved by technology

Among them, lithium cobalt oxide is still the mainstream material, mainly used in small lithium batteries with high energy density for high-end electronic products, but cobalt is highly toxic, resources are scarce, expensive, and its overcharge safety performance is poor

The shortcomings of spinel-type lithium manganese oxide have low specific capacity, and poor high-temperature cycle and storage performance have not been resolved.

Lithium iron phosphate has poor conductivity, poor product batch consistency, poor low temperature performance, and there is a problem that the dissolution of trace iron may cause short circuit of the battery

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