Composite lithium ion battery positive electrode material, preparation method thereof and lithium ion battery
A technology for lithium ion batteries and cathode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as structural damage, reduce gas generation, improve energy density and cycle performance, and reduce lithium carbonate content.
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Embodiment 1
[0049] This embodiment provides a method for preparing a composite lithium ion battery cathode material, and the preparation method includes the following steps:
[0050] (1) The nickel source, the cobalt source and the manganese source are made into a mixed solution and then the precursor is prepared by the co-precipitation method. The lithium source and the precursor are sintered to obtain the core layer material, the median diameter D50 is 7 μm, where Li The molar ratio of Ni:Co:Mn elements is 1.1:5:2:3;
[0051] (2) Mix the tetrabutyl titanate solution with 5% dilute ammonia water, keep the pH of the mixed solution at 7, solid-liquid separation to obtain a white precipitate, prepare the white precipitate and deionized water into a suspension, stir at high speed And adding a 30% hydrogen peroxide solution slowly to the suspension under a water bath at 40°C until the suspension is clear, and continue to stir after the reaction until the hydrogen peroxide is completely decomposed ...
Embodiment 2
[0056] This embodiment provides a method for preparing a composite lithium ion battery cathode material, and the preparation method includes the following steps:
[0057] (1) The nickel source, the cobalt source and the manganese source are made into a mixed solution and then the precursor is prepared by the co-precipitation method. The lithium source and the precursor are sintered to obtain the core layer material, the median diameter D50 is 9 μm, and the Li The molar ratio of Ni:Co:Mn elements is 1.1:6:2:2;
[0058] (2) Mix the titanium isopropoxide solution with 10% dilute ammonia water, keep the pH of the mixed solution at 7, solid-liquid separation to obtain a white precipitate, prepare the white precipitate and deionized water into a suspension, stir at high speed and Add a 30% hydrogen peroxide solution slowly to the suspension under a 40°C water bath until the suspension is clear, and continue to stir after the reaction until the hydrogen peroxide is completely decomposed t...
Embodiment 3
[0063] This embodiment provides a method for preparing a composite lithium ion battery cathode material, and the preparation method includes the following steps:
[0064] (1) The nickel source, the cobalt source and the manganese source are made into a mixed solution and then the precursor is prepared by the co-precipitation method. The lithium source and the precursor are sintered to obtain the inner core layer material, the median diameter D50 is 11 μm, and the Li The molar ratio of Ni:Co:Mn element is 1.2:8:1:1;
[0065] (2) Mix the titanyl sulfate solution with 15% dilute ammonia water, keep the pH of the mixed solution at 7, and obtain a white precipitate by solid-liquid separation. The white precipitate and deionized water are prepared into a suspension, and stirred at high speed and 40%. Add a 30% hydrogen peroxide solution slowly to the suspension under a water bath at °C until the suspension is clear, and continue stirring after the reaction until the hydrogen peroxide is ...
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Abstract
Description
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Application Information
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