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

A lithium-ion battery, large-scale preparation technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of promoting electrocatalytic kinetic process, volume change , complex process and other problems, to achieve the effect of improving intrinsic catalytic activity, fewer synthesis steps, and simple operation

Active Publication Date: 2022-05-06
TIANJIN UNIV
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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.

Method used

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

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Embodiment Construction

[0027] The technical solutions of the present invention will be further described below in conjunction with specific embodiments. The waste and old lithium ion battery cathode material that the present invention adopts is LiFePO 4 , that is, LiFePO, one of the most commercialized cathode materials 4 Take the preparation of large-scale and high-efficiency water electrolysis catalyst as an example.

[0028] Dissolve 0.16g of nickel nitrate hexahydrate into 10mL of pure water to form a homogeneous solution (that is, nickel nitrate is evenly dispersed in water); waste lithium-ion battery cathode material LiFePO 4 The powder is sieved, and the large-sized impurities are removed after sieving, and the positive electrode material powder with a particle size of less than 10 μm is collected, and then 0.03g LiFePO 4 After the waste powder is added to the solution, use an ultrasonic cleaning machine to ultrasonically disperse to form a uniform dispersion. The ultrasonic time is 8 hours...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/091C25B1/04H01M10/54
CPCB01J27/1853B01J23/755C25B1/04B01J35/33Y02W30/84Y02E60/36Y02P20/584
Inventor 陈亚楠崔柏桦邓意达胡文彬
Owner TIANJIN UNIV
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