A method for large-scale preparation of high-efficiency electrolytic water catalysts using waste lithium-ion battery cathode materials

Abstract

The invention discloses a method for large-scale preparation of high-efficiency electrolytic water catalysts by using the positive electrode materials of waste lithium-ion batteries. The powder of the positive electrode materials of waste lithium-ion batteries is collected, sieved to obtain powder materials, and the powder is put into a salt solution for reaction. After treatment, a regenerated catalytically active heterostructure nanomaterial catalyst is obtained, which is finally loaded on the anode electrode in the electrolytic cell to catalyze the oxygen evolution reaction. The invention has mild reaction conditions, easy realization, short preparation cycle, strong operability, large-scale preparation, low cost and green environmental protection in the whole process, and realizes recycling and utilization of waste lithium-ion batteries while obtaining high-efficiency catalysts for electrolysis water 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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