A kind of ternary cathode material, its preparation method and application
A technology for positive electrode materials and coating materials, which is applied in the field of preparation of ternary positive electrode materials, can solve the problems of complex process steps and difficult production industrialization, and achieve the effects of simple preparation methods, improved coating uniformity, and avoiding structural damage
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Embodiment 1
[0051] This embodiment provides a preparation method of a ternary positive electrode material, such as figure 1 As shown, the preparation method specifically includes the following steps:
[0052] (I) Weigh the coating material, which includes lithium salt and coating oxide, wherein the molar ratio of the lithium element in the lithium salt to the coating element in the coating oxide is 1.5:1, and mix it with an ester solvent , after mixing, carry out ultrasonic dispersion for 1h to obtain the coating agent;
[0053] (II) Stir the coating agent obtained in step (I) once and then add the positive electrode material. The way of stirring once is magnetic stirring, the time is 1h, the speed is 600rpm, and the ratio of the mass of the positive electrode material added to the mass of the coating material is 100 : 2, after a second stirring for 1 hour, ball milling until the ester solvent was completely volatilized, sintering at a temperature of 650° C. for 8 hours, and a heating ra...
Embodiment 2
[0057] This embodiment provides a preparation method of the above-mentioned ternary positive electrode material, such as figure 1 As shown, the preparation method specifically includes the following steps:
[0058] (I) Weigh the coating material, which includes lithium salt and coating oxide, wherein the molar ratio of lithium element in lithium salt to coating element in coating oxide is 3:1, and mix with ester solvent , after mixing, carry out ultrasonic dispersion for 1h to obtain the coating agent;
[0059] (II) Stir the coating agent obtained in step (I) once and then add the positive electrode material. The way of stirring once is magnetic stirring, the time is 1h, the speed is 600rpm, and the ratio of the mass of the positive electrode material added to the mass of the coating material is 100 : 3, after performing secondary stirring for 1 hour, ball milling until the ester solvent is completely volatilized, sintering at a temperature of 650° C. for 8 hours, and a heati...
Embodiment 3
[0063] This embodiment provides a preparation method of the above-mentioned ternary positive electrode material, such as figure 1 As shown, the preparation method specifically includes the following steps:
[0064] (I) Weigh the coating material, which includes lithium salt and coating oxide, wherein the molar ratio of the lithium element in the lithium salt to the coating element in the coating oxide is 1:1, and mix it with an ester solvent , after mixing, carry out ultrasonic dispersion for 2h to obtain the coating agent;
[0065] (II) Stir the coating agent obtained in step (I) once and then add the positive electrode material, the way of stirring once is magnetic stirring, the time is 0.5h, the speed is 650rpm, the ratio of the mass of the positive electrode material added to the mass of the coating material is 100:5, and then stirred again for 0.5h, ball milled until the ester solvent was completely volatilized, and sintered at a temperature of 700°C for 5h with a heatin...
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Abstract
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