Nickel cobalt lithium manganate positive electrode material and preparation method thereof, lithium ion battery positive electrode slurry, lithium ion battery positive electrode and lithium ion battery
A technology of lithium-nickel-cobalt-manganese-manganese-oxide and lithium-ion batteries, applied in nickel-cobalt-lithium-manganese-oxide cathode materials and its preparation, and in the field of lithium-ion battery cathodes. Performance and other issues, to achieve the effect of reducing impedance, increasing layer spacing, improving structural stability and conductivity
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Embodiment 1
[0064] Preparation of nickel cobalt lithium manganese oxide cathode material:
[0065] NiSO 4 ·6H 2 O. CoSO 4 ·7H 2 O, MnSO 4 ·H 2 O is mixed and placed in a beaker according to the molar ratio of 0.6:0.2:0.19, and dissolved in deionized water to obtain a solution with a metal ion concentration of 1.5mol / L;
[0066] Slowly add 3.0mol / L NaOH solution and 1.2mol / L ammonia water into the above solution according to the volume ratio of 1:1, adjust the pH to 10, stir in a 50°C water bath until the precipitation is complete, and wash it with deionized water several times at the same time; Soak the obtained precipitate in absolute ethanol for 1 hour, and then dry the precipitate in a constant temperature vacuum box at 85°C for 12 hours to obtain the nickel cobalt lithium manganese oxide cathode material precursor Ni 0.6 co 0.2 mn 0.19 (OH) 2 .
[0067] Mix the precursor of nickel cobalt lithium manganese oxide positive electrode material and basic copper carbonate according...
Embodiment 2
[0074] Preparation of nickel cobalt lithium manganese oxide cathode material:
[0075] NiSO 4 ·6H 2 O. CoSO 4 ·7H 2 O, MnSO 4 ·H 2 O is mixed and placed in a beaker according to the molar ratio of 0.6:0.2:0.18, and dissolved in deionized water to obtain a solution with a metal ion concentration of 1.5mol / L;
[0076] Slowly add 2.0mol / L NaOH solution and 1.5mol / L ammonia water into the above solution according to the volume ratio of 1:3, adjust the pH to 12, stir in a 40°C water bath until the precipitation is complete, and wash it with deionized water several times at the same time; Soak the obtained precipitate in absolute ethanol for 1.5h, and then dry the precipitate in a constant temperature vacuum box at 80°C for 14h to obtain the nickel cobalt lithium manganese oxide cathode material precursor Ni 0.6 co 0.2 mn 0.18 (OH) 2 .
[0077] Mix the precursor of nickel cobalt lithium manganese oxide positive electrode material and basic copper carbonate according to the...
Embodiment 3
[0084] Preparation of nickel cobalt lithium manganese oxide cathode material:
[0085] NiSO 4 ·6H 2 O. CoSO 4 ·7H 2 O, MnSO 4 ·H 2 O is mixed and placed in a beaker according to the molar ratio of 0.6:0.2:0.14, and dissolved in deionized water to obtain a solution with a metal ion concentration of 2.0mol / L;
[0086] Slowly add 4.0mol / L NaOH solution to the above solution, adjust the pH to 11, stir in a 60°C water bath until the precipitation is complete, and wash it with deionized water several times at the same time; place the obtained precipitate in absolute ethanol for soaking 0.5h, and then put the precipitate in a constant temperature vacuum oven at 100°C and dry for 10h to obtain the nickel cobalt lithium manganese oxide cathode material precursor Ni 0.6 co 0.2 mn 0.14 (OH) 2 .
[0087] Mix the precursor of nickel cobalt lithium manganese oxide positive electrode material and basic copper carbonate according to the molar ratio of 1:0.06 for ball milling, then c...
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