Preparation method of lanthanum trioxide and battery cathode material coated with lanthanum trioxide

A technology of dilanthanum trioxide and coating layer, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of poor cycle stability of ternary positive electrode modified materials, achieve good stability and cycle performance, and inhibit corrosion function, the effect of improving stability

Inactive Publication Date: 2018-12-07
CH AUTO TECH CORP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention proposes a kind of preparation method of dilanthanum trioxide, aims to solve the problem of existing lithium ion battery LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 The problem of poor cycle stability of ternary cathode modified materials

Method used

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  • Preparation method of lanthanum trioxide and battery cathode material coated with lanthanum trioxide
  • Preparation method of lanthanum trioxide and battery cathode material coated with lanthanum trioxide
  • Preparation method of lanthanum trioxide and battery cathode material coated with lanthanum trioxide

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Effect test

Embodiment 1

[0051] Weigh 1.0823g of lanthanum nitrate and fully dissolve to obtain A solution; weigh 1.15g of urea and fully dissolve to obtain B solution; add the B solution dropwise to the A solution, stir while adding, and keep the water bath The temperature is 80°C; start timing when all the B solution is added to the A solution, vigorously stir the mixture of the A solution and the B solution, and react at a constant temperature for 12 hours to obtain the C solution; filter the C solution Obtain a precipitate, wash and collect the precipitate, and dry the precipitate at room temperature to obtain a lanthanum hydroxide precursor; place the lanthanum hydroxide precursor at 800°C at a heating rate of 2°C / min and 2°C / min After 5 hours of heat treatment at a cooling rate of min, dilanthanum trioxide can be obtained.

Embodiment 2

[0052] Embodiment 2 (1) takes by weighing an appropriate amount of pure phase ternary lithium ion battery cathode material LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 ,

[0053]Add it into ethanol, disperse evenly, then add 1.0823g of lanthanum nitrate to it, so that the lanthanum nitrate is completely dissolved, and obtain the A mixed solution;

[0054] (2) Weigh 1.1523g of urea, add it to 50ml of ethanol, and ultrasonically dissolve it to obtain solution B, add solution B dropwise to the mixed solution of A, stir while adding, and keep the temperature of the water bath at 80°C; start timing when all the B solution is added to the A mixture, vigorously stir the mixture of the A mixture and the B solution, and react at a constant temperature for 12 hours to obtain the C mixture;

[0055] (3) The C mixture is filtered to obtain a precipitate, washed, collected, and dried at room temperature to obtain lanthanum hydroxide-coated LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 ;

[0056] (4) LiNi coated with ...

Embodiment 3

[0058] (1) Weigh an appropriate amount of pure phase ternary lithium-ion battery cathode material LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , was added to ethanol, dispersed evenly, and then 1.08g of lanthanum acetate was added thereto to completely dissolve the lanthanum acetate to obtain a mixed solution of A;

[0059] (2) Weigh 1.54g of urea, add it to 50ml of ethanol, and ultrasonically dissolve it to obtain solution B, add solution B dropwise to the mixed solution of A, stir while adding, and keep the temperature of the water bath at 80°C; start timing when all the B solution is added to the A mixture, vigorously stir the mixture of the A mixture and the B solution, and react at a constant temperature for 12 hours to obtain the C mixture;

[0060] (3) The C mixture is filtered to obtain a precipitate, washed, collected, and dried at room temperature to obtain lanthanum hydroxide-coated LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 ;

[0061] (4) LiNi coated with the lanthanum hydroxide 1 / 3 co 1 / ...

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Abstract

The invention provides a preparation method of lanthanum trioxide and a positive electrode material of a battery coated with lanthanum trioxide, which comprises the following steps of: dissolving a proper amount of lanthanum salt to obtain liquid A; B liquid is obtain by dissolving an appropriate amount of complexe agent; B liquid is adde into A solution dropwise, stirred while adde dropwise, andthat temperature is maintained at (60-90) DEG C; Isothermal reaction (10-16) h to obtain C solution; C solution is filter to obtain precipitate, washed, precipitate is collect and dried at room temperature to obtain lanthanum hydroxide precursor; Lanthanum trioxide can be obtained by heat treatment of the precursor for a period of time. The invention provides a preparation method of lanthanum trioxide, The preparation process is simple, the cost is low, and the prepared lanthanum trioxide is nano-granular structure. Moreover, the nano-structure has strong stability, which is conducive to reducing the contact probability between the active material and the electrolyte in the cathode material, can effectively inhibit the corrosion of the electrolyte on the active material, and improves the stability of the cathode modified material.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a preparation method of lanthanum trioxide and a battery positive electrode material coated with lanthanum trioxide. Background technique [0002] Today's social and economic development is very rapid, people's living standards continue to improve, and the demand for energy in human society is also increasing. However, non-renewable fossil energy sources such as coal, oil, and natural gas are far from being able to meet people's growing energy needs, and the environmental pollution caused by burning fossil fuels is also becoming more and more serious, among which PM2.5 is the most eye-catching, and many urban smog The smog is serious, so the main task of today's society is to find and develop new energy sources with high efficiency, environmental protection and sustainable development. Devices that can convert chemical energy into electrical energy are called chemi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/505H01M4/525H01M10/0525
CPCH01M4/366H01M4/48H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 王克坚张奎博
Owner CH AUTO TECH CORP CO LTD
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