Method for large-scale preparation of efficient electrolyzed water catalyst by using positive electrode material of waste lithium ion batteries

Abstract

The invention discloses a method for the large-scale preparation of an efficient water electrolysis catalyst by using the positive electrode material of waste lithium ion batteries. The method comprises the following steps of: collecting the positive electrode material powder of the waste lithium ion batteries, sieving the positive electrode material powder to obtain a powder material; putting the powder into a salt solution for reaction; performing treatment to obtain a regenerated heterostructure nano-material catalyst with catalytic activity; and finally loading the catalyst onto an anode electrode in an electrolytic tank to catalyze an oxygen evolution reaction. The method is mild in reaction condition, easy to implement, short in preparation period, high in operability, capable of achieving large-scale preparation, low in cost and environmentally friendly in the whole process, achieves resource recycling of the waste lithium ion batteries and meanwhile obtains the efficient catalyst for the water electrolysis reaction.

Description

technical field [0001] The invention belongs to the technical field of electronic waste recycling and electrocatalytic water splitting, in particular to high-efficiency electrolytic water catalyst LiFePO 4 @Ni(OH) 2 The invention relates to a method for preparing a core-shell heterogeneous catalyst material, which belongs to the technical field of new materials, and is mainly used in the electrocatalytic moisture analysis oxygen reaction. Background technique [0002] Lithium-ion batteries (LIBs) have become mainstream power sources for portable electronics and electric vehicles due to their high energy and high power density [1]. It is foreseeable that the end of battery life will inevitably produce a large number of waste batteries, which will bring great pressure to the sustainable development of society. On the one hand, toxic by-products and heavy metals (such as Co, Mn, Ni, Fe, etc.) will pollute the environment and threaten the survival of organisms. On the other h...

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Problems solved by technology

2) Cathode materials in Li-ion batteries are subjected to repeated charge-discharge, resulting in volume changes and a large number of defects (such as interfaces, edges, and strains), which have the potential to promote electrocatalytic kinetic processes

The large-scale popularization of electric vehicles and various electronic devices will generate a large amount of waste battery materials. The current recycling method has many problems such as complicated process and high cost.

Lithium-ion battery cathode materials contain a large amount of transition metal elements such as Fe, Co, Ni, and Mn, and there is little research on their direct recovery and modification to prepare high-performance nanomaterial catalysts.

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