A method for preparing a high-voltage cathode material by using a waste lithium cobalt oxide battery

A positive electrode material, old lithium cobalt oxide technology, applied in the field of waste lithium-ion battery recycling and reuse, can solve the problems of inactive materials, insignificant product value-added, and insignificant value-added, and achieve high structural stability and efficient green restoration And value-added utilization, the effect of simple method

Active Publication Date: 2019-01-01
江西九鼎动力新能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods have the following shortcomings: 1) The treatment of the positive electrode material after stripping still involves wet leaching and precipitation processes, the process flow is relatively long and the technology is difficult; 2) The recovered materials cannot be directly used as active materials. Product value-added is not obvious
Invention patent CA105428747A discloses a method of using lithium hydroxide solution to repair and recyc...

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  • A method for preparing a high-voltage cathode material by using a waste lithium cobalt oxide battery
  • A method for preparing a high-voltage cathode material by using a waste lithium cobalt oxide battery
  • A method for preparing a high-voltage cathode material by using a waste lithium cobalt oxide battery

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Embodiment 1

[0027] A method for preparing high-voltage positive electrode materials using waste lithium cobalt oxide batteries, such as figure 1 Shown, specifically include the following steps:

[0028] (1) Put the waste lithium cobalt oxide battery in 2mol / L sodium sulfate solution to discharge the remaining electricity, discharge for 24 hours, separate the positive electrode piece, and place it in a 6% sodium hydroxide solution by mass percentage, stir React for 12 hours, wash and filter the filter residue to become waste cathode material; calcinate the obtained filter residue at 600°C for 2 hours in an atmosphere furnace to obtain waste LiCoO 2 For powder materials, detect the percentage content of cobalt and lithium (Co, Li);

[0029] (2) According to the lithium-rich manganese-based solid solution The stoichiometric ratio, take nickel sulfate, cobalt sulfate and manganese sulfate, be mixed with the mixed salt solution of nickel salt, cobalt salt, manganese salt, the concentration ...

Embodiment 2

[0034] A kind of method adopting waste and old lithium cobalt oxide battery to prepare high-voltage cathode material, specifically comprises the following steps:

[0035] (1) Put the waste lithium cobalt oxide battery in 2mol / L sodium sulfate solution to discharge the remaining electricity, discharge for 24 hours, separate the positive electrode piece, and place it in a 6% sodium hydroxide solution by mass percentage, stir React for 12 hours, wash and filter the filter residue to become waste cathode material; calcinate the obtained filter residue at 600°C for 2 hours in an atmosphere furnace to obtain waste LiCoO 2 For powder materials, detect the percentage content of cobalt and lithium (Co, Li);

[0036] (2) According to the lithium-rich manganese-based solid solution stoichiometric ratio, take nickel chloride, cobalt chloride and manganese chloride, be mixed with the mixed salt solution of nickel salt, cobalt salt, manganese salt, the concentration sum of Ni+Co+Mn in the...

Embodiment 3

[0041] A kind of method adopting waste and old lithium cobalt oxide battery to prepare high-voltage cathode material, specifically comprises the following steps:

[0042] (1) Put the waste lithium cobalt oxide battery in 2mol / L sodium sulfate solution to discharge the remaining electricity, discharge for 24 hours, separate the positive electrode piece, and place it in a 6% sodium hydroxide solution by mass percentage, stir React for 12 hours, wash and filter the filter residue to become waste cathode material; calcinate the obtained filter residue at 600°C for 2 hours in an atmosphere furnace to obtain waste LiCoO 2 For powder materials, detect the percentage content of cobalt and lithium (Co, Li);

[0043] (2) According to the lithium-rich manganese-based solid solution The stoichiometric ratio, take nickel nitrate, cobalt nitrate and manganese nitrate, be mixed with the mixed salt solution of nickel salt, cobalt salt, manganese salt, the concentration sum of Ni+Co+Mn in th...

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Abstract

The invention discloses a method for preparing a high-voltage cathode material by using a waste lithium cobalt oxide battery. The stripped cathode material of the waste lithium cobalt oxide battery iscleaned, calcined and the content of cobalt and lithium in the cathode material is detected. According to the stoichiometric ratio of lithium-rich manganese solid solution, nickel salt, cobalt salt and manganese salt are prepared into mixed salt solution of nickel salt, cobalt salt and manganese salt, and then a complexing agent solution I, complexing agent solution II and precipitating agent solution are prepared respectively; adding a complexing agent solution II as a base liquid into the reaction kettle and adding the calcined waste lithium cobaltate material, the Ni-Co-Mn mixed salt solution, the complexing agent solution I and the precipitating agent solution are respectively added to carry out a precipitation reaction, the pH value, the concentration of the complexing agent, reaction temperature and reaction time are controlled, filtering, cleaning and drying are performed to obtain a composite precursor, and the composite precursor is mixed with a lithium source and calcined tocool to room temperature to obtain the cathode electrode material; and the material prepared by the invention has high crystallinity, high structural stability and good high voltage charge-dischargecycle stability.

Description

technical field [0001] The invention relates to the field of recovery and reuse of waste lithium ion batteries, in particular to a method for preparing high-voltage positive electrode materials using waste lithium cobalt oxide batteries. Background technique [0002] Lithium-ion batteries are recognized by the international community as the most ideal chemical power source for their high energy density, long life, small self-discharge, no memory effect, and environmental protection. They are widely used in mobile phones, notebook computers, power tools, and portable cameras. and other electronic products. At the same time, lithium-ion batteries play an important role in the field of intermittent clean energy storage such as wind energy, solar energy and tidal energy. In addition, the ever-expanding fields of electric vehicles, electric bicycles, aerospace, military mobile communication tools and equipment will bring more room for the development of lithium-ion batteries. H...

Claims

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Application Information

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IPC IPC(8): H01M10/54H01M4/58H01M10/0525
CPCH01M4/5825H01M10/0525H01M10/54Y02E60/10Y02W30/84
Inventor 段建国张英杰董鹏孟奇
Owner 江西九鼎动力新能源科技有限公司
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