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Method for preparing nickel-cobalt-aluminum ternary positive electrode material precursor by using superalloy waste

A cathode material, superalloy technology, applied in chemical instruments and methods, nickel compounds, electrical components, etc., can solve problems such as no relevant reports, lack of cobalt resources, environmental pollution, etc., and achieve high discharge capacity and novel preparation process methods. , the effect of short process

Active Publication Date: 2019-08-06
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There is a considerable amount of high-temperature alloys in China and most of them are downgraded and used, which is easy to cause resource waste and environmental pollution; while the current high-energy-density lithium battery nickel-cobalt-aluminum ternary cathode material precursor has a good market prospect and high product added value, and nickel-cobalt-aluminum ternary Nickel-cobalt-aluminum ternary cathode materials prepared from precursors have been applied to Tesla electric vehicles. Domestic research and application of nickel-cobalt-aluminum ternary cathode materials are also increasing day by day. However, my country's cobalt resources are seriously scarce, and its resource prices have been rising in recent years. The growth trend, its production capacity has severely restricted the development of my country's electric vehicle field, and the nickel-based waste superalloy contains a considerable amount of cobalt, and its nickel-cobalt content is close to the nickel-cobalt ratio in the nickel-cobalt-aluminum ternary precursor, so it is adopted Nickel-based superalloy waste is used as raw material to prepare the precursor of nickel-cobalt-aluminum ternary cathode material with high added value, which can improve resource utilization and reduce environmental pollution, which is of positive significance
However, there is no relevant report on the method for preparing the precursor of nickel-cobalt-aluminum ternary cathode material using nickel-based superalloy waste as raw material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation method of this embodiment is:

[0034]Step 1. Electrochemically dissolving superalloy waste in sulfuric acid solution by using a direct current power supply. During the electrochemical dissolution process, the anode is a titanium basket, the cathode is a titanium mesh, and the titanium basket and the titanium mesh are placed in parallel; the titanium mesh is placed vertically , the titanium basket is 2cm apart from the titanium mesh; the superalloy waste is placed in the titanium basket; the voltage of the DC power supply is 2.5V, and the concentration of the sulfuric acid solution is 0.8mol / L; the superalloy waste is nickel-based alloy, the main metal components in the nickel-based alloy include (by mass percentage): Ni 52.03%, Co 15.97%, Cr 10.93%, Al 4.38%, Fe 1.46%, W5.89%, Mo 5.44% , Ti 1.88%;

[0035] Step 2. After the electrochemical dissolution described in step 1 is completed, the electrolyte solution is obtained. First, filter the electrolyte ...

Embodiment 2

[0041] The preparation method of this embodiment is:

[0042] Step 1. Electrochemically dissolving superalloy waste in sulfuric acid solution by using a direct current power supply. During the electrochemical dissolution process, the anode is a titanium basket, the cathode is a titanium mesh, and the titanium basket and the titanium mesh are placed in parallel; the titanium mesh is placed vertically , the titanium basket is 3cm apart from the titanium mesh; the superalloy waste is placed in the titanium basket; the voltage of the DC power supply is 3.5V, and the concentration of the sulfuric acid solution is 1.0mol / L; the superalloy waste is nickel-based alloy, the main metal components in the nickel-based alloy include (by mass percentage): Ni 60.32%, Co 9.05%, Cr 8.33%, Al 5.33%, Fe 0.26%, W 9.89%, Mo 0.44%, Ti 1.41%, Zr 0.04%, Hf 1.41%, Ta 2.35%;

[0043] Step 2. After the electrochemical dissolution described in step 1 is completed, the electrolyte solution is obtained. F...

Embodiment 3

[0049] The preparation method of this embodiment is:

[0050] Step 1. Electrochemically dissolving superalloy waste in sulfuric acid solution by using a direct current power supply. During the electrochemical dissolution process, the anode is a titanium basket, the cathode is a titanium mesh, and the titanium basket and the titanium mesh are placed in parallel; the titanium mesh is placed vertically , the titanium basket is 6cm apart from the titanium mesh; the superalloy waste is placed in the titanium basket; the voltage of the DC power supply is 3.2V, and the concentration of the sulfuric acid solution is 2.0mol / L; the superalloy waste is nickel-based alloy, the main metal components in the nickel-based alloy include (by mass percentage): Ni 55.32%, Co 13.01%, Cr 15.42%, Al 2.11%, Fe 0.47%, W4.08%, Mo 3.99% , Ti 3.67%, Zr 0.05%, Nb 0.88%, Ta 0.01%;

[0051] Step 2. After the electrochemical dissolution described in step 1 is completed, the electrolyte solution is obtained....

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Abstract

The invention discloses a method for preparing a precursor of a nickel-cobalt-aluminum ternary positive-electrode material by utilizing a high-temperature alloy waste material. The method comprises the following steps: 1, carrying out electrochemical dissolution on high-temperature alloy waste to obtain an electrolyte; 2, carrying out filtration and adsorption treatment on the electrolyte to obtain a mixed solution A; 3, adjusting the nickel-cobalt-aluminum proportion and the pH value in the mixed solution A to obtain a mixed solution B; 4, adding the mixed solution B, ammonia water and a sodium hydroxide solution into a reactor containing a base solution for reaction, so as to obtain a nickel-cobalt-aluminum mixed precipitate; and 5, ageing the mixed precipitate, and performing washing, filtering and drying to obtain the precursor of the nickel-cobalt-aluminum ternary positive-electrode material. The invention aims at the difficult problems that the high-temperature alloy waste recovery is difficult, the cost is high and the added value of products is low, and provides the method for preparing the precursor of the nickel-cobalt-aluminum ternary positive-electrode material by utilizing the high-temperature alloy waste material. The preparation method has a short technological process and high added value of products, and has a good industrial prospect.

Description

technical field [0001] The invention belongs to the technical field of preparation of nickel-cobalt-aluminum ternary positive electrode materials, and in particular relates to a method for preparing a nickel-cobalt-aluminum ternary positive electrode material precursor by using superalloy waste. Background technique [0002] There is a considerable amount of high-temperature alloys in China and most of them are downgraded and used, which is easy to cause resource waste and environmental pollution; while the current high-energy-density lithium battery nickel-cobalt-aluminum ternary cathode material precursor has a good market prospect and high product added value, and nickel-cobalt-aluminum ternary Nickel-cobalt-aluminum ternary cathode materials prepared from precursors have been applied to Tesla electric vehicles. Domestic research and application of nickel-cobalt-aluminum ternary cathode materials are also increasing day by day. However, my country's cobalt resources are ser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G53/00H01M4/525
CPCY02E60/10
Inventor 张卜升吴永谦陈昆昆杨阳周名书操齐高郑晶
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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