Aluminum element doped NCM622 type high-nickel ternary material and preparation method thereof
A high-nickel ternary material and element doping technology, applied in electrical components, electrochemical generators, battery electrodes, etc., can solve problems such as being unsuitable for industrial production, reducing doping ion activity, and increasing material resistance, achieving good The effect of rate performance and cycle stability, simple process flow and uniform particle size distribution
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Embodiment 1
[0026] This embodiment provides a method for preparing an aluminum-doped NCM622 high-nickel ternary material, which specifically includes the following steps:
[0027] (1) According to Al 3+ The doping amount is 1mol%, that is, 1mol% of the total metal content M (M=Ni+Co+Mn), and the stoichiometric ratio of Al(OH) is weighed 3 、Ni 0.6 co 0.2 mn 0.2 (OH) 2 Precursor, Li 2 CO 3 , mix thoroughly in a blender until smooth. The amount of lithium source added is according to the molar ratio of lithium ions to all metal ions Li + :Al 3+ +(Ni+Co+Mn) 2+ =1.05:1.
[0028] (2) Move the above mixture into a tube furnace, heat it to 450°C at a heating rate of 2°C / min under an oxidizing atmosphere, keep it at this temperature for 4 hours, and then heat it to 750°C at a heating rate of 5°C / min. ℃, kept at this temperature for 12 hours, after natural cooling, crushing, grinding and sieving, Al 3+ Doped high-nickel ternary nickel-cobalt-manganese cathode material Li(Ni 0.6 co 0.2...
Embodiment 2
[0033] This embodiment provides a method for preparing an aluminum-doped NCM622 high-nickel ternary material, which specifically includes the following steps:
[0034] (1) According to Al 3+ The doping amount is 2mol%, that is, 2mol% of the total metal content M (M=Ni+Co+Mn), and the stoichiometric ratio of Al(OH) is weighed 3 、Ni 0.6 co 0.2 mn 0.2 (OH) 2 Precursor, Li 2 CO 3 Mix well in a mixer until smooth. The amount of source added is the molar ratio of lithium ions to all metal ions is Li + :Al 3+ +(Ni+Co+Mn) 2+ =1.05:1.
[0035] (2) Move the above mixture into a tube furnace, heat it to 450°C at a heating rate of 2°C / min under an oxidizing atmosphere, keep it at this temperature for 4 hours, and then heat it to 780°C at a heating rate of 5°C / min ℃, kept at this temperature for 12 hours, after natural cooling, crushing, grinding and sieving, Al 3+ Doped high-nickel ternary nickel-cobalt-manganese cathode material Li(Ni 0.6 co 0.2 mn 0.2 ) 0.98 al 0.02 o ...
Embodiment 3
[0038] This embodiment provides a method for preparing an aluminum-doped NCM622 high-nickel ternary material, which specifically includes the following steps:
[0039] (1) According to Al 3+ The doping amount is 3mol% / M, and the Al(OH) of the stoichiometric ratio is weighed 3 、Ni 0.6 co 0.2 mn 0.2 (OH) 2 Precursor, Li 2 CO 3 Mix well in a mixer until smooth. The amount of lithium source added is the molar ratio Li of lithium ions to all metal ions + :Al 3+ +(Ni+Co+Mn) 2+ =1.05:1.
[0040] (2) Move the above mixture into a tube furnace, heat it to 450°C at a heating rate of 2°C / min under an oxidizing atmosphere, keep it at this temperature for 4 hours, and then heat it to 800°C at a heating rate of 5°C / min. ℃, kept at this temperature for 12 hours, after natural cooling, crushing, grinding and sieving, Al 3+ Doped high-nickel ternary nickel-cobalt-manganese cathode material Li(Ni 0.6 co 0.2 mn 0.2 ) 0.97 al 0.03 o 2 .
[0041] The material obtained by the met...
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