Preparation method of peanut-like nickel cobalt lithium manganate positive electrode material
A technology of nickel-cobalt-lithium-manganese-manganate and cathode materials, which is applied in the direction of positive electrodes, battery electrodes, active material electrodes, etc., can solve the problems of uneven particle size, low specific surface area, and reduced active sites of lithium ions, so as to simplify production The effect of craft
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Embodiment 1
[0026] 0.02 mol Ni(CH 3 COO) 2 4H 2 O (5.0789 g), 0.008 mol Co(CH 3 COO) 2 4H 2 O (2.0027g), 0.012 mol Mn(CH 3 COO) 2 4H 2 O (2.97079 g) was dissolved in 400 mL of deionized water with a total metal ion concentration of 0.1 mol L -1 , add 7.2800 g NH according to the molar ratio of urea to metal ion is 3:1 2 CONH 2 (0.12mol), the mixed solution was magnetically stirred for 30min and then transferred to a polyvinyl fluoride-lined autoclave, sealed and reacted at 160°C for 24 hours, naturally cooled to room temperature, and the resulting precipitate was filtered, washed, and dried After drying, the nickel-cobalt-manganese carbonate precursor material is obtained, and its morphology is as follows figure 1 As shown, it is flocculent peanut-like secondary particles composed of primary flaky particles.
[0027] will get Ni 0.5 co 0.2 mn 0.3 CO 3 Precursors and Li 2 CO 3 According to the molar ratio of 1:1.1, it was mixed evenly and put into a muffle furnace, calcin...
Embodiment 2
[0029] 0.06 mol NiSO 4 ·6H 2 O (15.7710 g), 0.02 mol CoSO 4·7H 2 O (5.6230 g), 0.02 mol MnSO 4 ·H 2 O (3.3804 g) is dissolved in 100 mL of deionized water and ethylene glycol in a mixed solution with a volume ratio of 8:1, and the total concentration of metal ions is 0.5 mol L -1 , add 9.0999 g NH according to the molar ratio of urea to metal ion is 1.5:1 2 CONH 2 (0.15mol), the mixed solution was magnetically stirred for 30min and then transferred to a polyvinyl fluoride-lined autoclave, sealed and reacted at 170°C for 12 hours, naturally cooled to room temperature, and the resulting precipitate was filtered, washed, and dried After drying, the nickel-cobalt-manganese carbonate precursor material is obtained.
[0030] Combine the obtained precursor with Li 2 CO 3 According to the molar ratio of 1:1.03, it was mixed evenly and put into a muffle furnace, calcined at 800 °C for 10 h in an oxygen atmosphere, cooled and ground with the furnace to obtain the final product ...
Embodiment 3
[0032] 0.02 mol Ni(CH 3 COO) 2 4H 2 O (5.0789 g), 0.008 mol Co(CH 3 COO) 2 4H 2 O (2.0027g), 0.012 mol Mn(CH 3 COO) 2 4H 2 O (2.97079 g) was dissolved in 200 mL of a mixed solution of deionized water and ethylene glycol with a volume ratio of 6:1, and the total concentration of metal ions was 0.2 mol L -1 , add 5.3382 g NH according to the molar ratio of urea to metal ion is 2:1 2 CONH 2 (0.08mol), the mixed solution was magnetically stirred for 30min and then transferred to a polyvinyl fluoride-lined autoclave, sealed and reacted at 180°C for 10 hours, naturally cooled to room temperature, and the resulting precipitate was filtered, washed, and dried After drying, the nickel-cobalt-manganese carbonate precursor material is obtained.
[0033] will get Ni 0.5 co 0.2 mn 0.3 CO 3 Precursors and Li 2 CO 3 According to the molar ratio of 1:1.05, it was mixed evenly and put into a muffle furnace, calcined at 850 °C for 12 h in an air atmosphere, cooled and ground wi...
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