Anode material, preparation method of anode material and lithium ion battery comprising anode material
A technology for lithium ion batteries and positive electrode materials, applied in the field of positive electrode materials and their preparation, can solve the problems of unstable use structure, poor cycle performance, low discharge capacity, etc., and achieve enhanced structural stability, excellent lithium ion conductivity, The effect of high volumetric energy density
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[0035] Embodiment 1: The cathode material provided in this embodiment is Li with a coating amount of 3wt% 1.01 Co 0.99 Mg 0.01 O 2 / LiNi 0.5 Mn 0.5 O 2 The cathode material, the BET of the cathode material is 0.35m 2 / g, D 50 =9.0μm. Among them, Li 1.01 Co 0.99 Mg 0.01 O 2 / LiNi 0.5 Mn 0.5 O 2 Represents Li 1.01 Co 0.99 Mg 0.01 O 2 Bulk material, LiNi 0.5 Mn 0.5 O 2 It is the positive electrode material of the surface layer material, the same below.
[0036] The preparation method is as follows: respectively weigh a certain mass of lithium acetate, manganese acetate, nickel acetate and citric acid into 400 mL of water, stir to dissolve them to form a lithium nickel manganese mixed solution, and adjust the pH of the solution to 7.8; add 250 g of body Phase material Li 1.01 Co 0.99 Mg 0.01 O 2 Stir the powder evenly; adjust the pH of the solution to 11.8, stir and mix evenly; after drying the above-mentioned mixed solution, first calcine in an air atmosphere of 600 ℃ for 2 hours, ...
Example Embodiment
[0037] Embodiment 2: The cathode material provided in this embodiment is LiCo with a coating amount of 1 wt% 0.998 Ti 0.002 O 2 / Li 1.02 Ni 0.5 Mn 0.498 Al 0.002 O 2 Positive electrode material, the BET of the positive electrode material is 0.27m 2 / g, D 50 =15.0μm.
[0038] The preparation method is as follows: respectively weigh a certain mass of lithium nitrate, manganese nitrate, nickel nitrate, aluminum nitrate and ammonia water and add them to 300 mL of water, stir to dissolve them to form a lithium nickel manganese aluminum mixed solution, and adjust the pH of the solution to 6.2; Add 250g LiCo 0.998 Ti 0.002 O 2 Stir the powder uniformly, adjust the pH of the solution to 10.1, stir and mix uniformly; after drying the above-mentioned mixed solution, calcinate at 550°C for 4 hours in an air atmosphere, and then calcinate at 1000°C for 4 hours in an air atmosphere to obtain the Cathode material.
Example Embodiment
[0039] Embodiment 3: The cathode material provided in this embodiment is LiCo with a coating amount of 8wt% 0.99 Ni 0.01 O 2 / LiNi 0.5 Mn 0.45 Zr 0.05 O 2 The cathode material, the BET of the cathode material is 0.22m 2 / g, D 50 =18.0μm.
[0040] The preparation method is as follows: respectively weigh a certain mass of lithium hydroxide, manganese nitrate, nickel acetate, zirconium nitrate and tartaric acid into 400 mL of water, stir to dissolve them to form a mixed solution of lithium nickel manganese zirconium, and adjust the pH of the solution to 6.7 ; Add 200g LiCo 0.99 Ni 0.01 O 2 Stir the powder uniformly, adjust the pH of the solution to 11.2, stir and mix uniformly; after drying the above-mentioned mixed solution, first calcinate in an air atmosphere at 700°C for 5 hours, and then calcinate in an air atmosphere at 800°C for 15 hours to obtain the Cathode material.
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