Lithium ion battery positive electrode material and preparation method thereof
A lithium-ion battery and cathode material technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as increased manufacturing costs, inapplicability, and poor material performance, and achieve improved fluidity, difficult structure, and internal voids small effect
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Embodiment 1
[0029] This embodiment provides a method for preparing a lithium-ion battery positive electrode material, the steps are as follows:
[0030] Ni with a median diameter of about 10 μm 0.815 co 0.15 Al 0.035 (OH) 2 Precursor (that is, nickel-cobalt-aluminum co-precipitation precursor A) and LiOH at a ratio of 1:1.05 (equivalent to the molar ratio of the sum of all metal ions of nickel-cobalt-aluminum co-precipitation precursor A to the lithium ion of LiOH, the same below) Mix evenly, place the mixture in a sintering furnace under an oxygen atmosphere, raise the temperature to 520°C at 5°C / min, keep it for 3 hours, then raise the temperature to 760°C at 1°C / min, keep it for 10 hours, and finally cool naturally to room temperature to obtain a spherical shape Morphology of nickel-cobalt-lithium-aluminate particles.
[0031] Ni with a median diameter of about 3 μm 0.88 co 0.09 Al 0.03 (OH) 2Precursor (that is, nickel-cobalt-aluminum co-precipitation precursor B) and LiOH at a...
Embodiment 2
[0035] This embodiment provides a method for preparing a lithium-ion battery positive electrode material, the steps are as follows:
[0036] Ni with a median diameter of about 12 μm 0.85 co 0.12 al 0.03 (OH) 2 The precursor (i.e. nickel-cobalt-aluminum co-precipitation precursor A) and LiOH were mixed uniformly at a ratio of 1:1.04, and the mixture was placed in a sintering furnace under an oxygen atmosphere, and the temperature was raised to 500 °C at 5 °C / min, kept for 3 h, and then The temperature was raised to 770°C at 1°C / min, kept for 10 hours, and finally cooled to room temperature naturally to obtain spherical nickel-cobalt-lithium aluminate particles.
[0037] Ni with a median diameter of about 5 μm 0.85 co 0.12 al 0.03 (OH) 2 The precursor (i.e. nickel-cobalt-aluminum co-precipitation precursor B) and LiOH were mixed uniformly at a ratio of 1:1.04, and the mixture was placed in a sintering furnace under an oxygen atmosphere, and the temperature was raised to 5...
Embodiment 3
[0041] This embodiment provides a method for preparing a lithium-ion battery positive electrode material, the steps are as follows:
[0042] Ni with a median diameter of about 9 μm 0.88 co 0.09 al 0.03 (OH) 2 The precursor (i.e. nickel-cobalt-aluminum co-precipitation precursor A) and LiOH were mixed uniformly at a ratio of 1:1.10, and the mixture was placed in a sintering furnace under an oxygen atmosphere, and the temperature was raised to 540 °C at 5 °C / min, kept for 3 h, and then The temperature was raised to 780°C at 1°C / min, kept for 10h, and finally cooled to room temperature naturally to obtain spherical nickel-cobalt-lithium aluminate particles.
[0043] Ni with a median diameter of about 5 μm 0.85 co 0.12 al 0.03 (OH) 2 The precursor (i.e. nickel-cobalt-aluminum co-precipitation precursor B) and LiOH were mixed uniformly at a ratio of 1:0.9, and the mixture was placed in a sintering furnace under an oxygen atmosphere, and the temperature was raised to 530 °C a...
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