Lithium composite oxide particle for positive electrode material of lithium secondary battery, and lithium secondary battery positive electrode and lithium secondary battery using the same
A composite oxide and lithium secondary battery technology, applied in secondary batteries, battery electrodes, active material electrodes, etc., can solve the problems of reducing the filling efficiency of positive electrode active materials and limiting battery capacity, etc., and achieve excellent low-temperature load characteristics, excellent Coatability, effect of improving low temperature load characteristics
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[0214] Example 1
[0215] Weigh NiO and Co(OH) as raw materials for nickel, cobalt and manganese 2 And Mn 3 O 4 , So that the molar ratio of Ni:Co:Mn is 0.33:0.33:0.33. Pure water is added to the weighed raw materials to prepare slurry. Then, under stirring, the slurry is wet-pulverized with a circulating medium stirring wet bead mill until the average particle diameter of the solids in the slurry is 0.3 μm.
[0216] The slurry is then spray-dried with a spray dryer to form approximately spherical granulated particles with a diameter of about 5 μm and composed of nickel, cobalt, and manganese raw materials. LiOH powder with a median particle diameter of 3 μm was added to the granulated particles thus obtained so that the molar ratio of Li relative to the total number of moles of Ni, Co, and Mn was 1.05, followed by mixing with a high-speed stirrer. Thus, a mixture powder of granulated particles of nickel, cobalt, and manganese raw materials and lithium raw materials can be obtaine...
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[0218] Example 2
[0219] Weigh NiO and Co(OH) as raw materials for nickel, cobalt, manganese and lithium 2 And Mn 3 O 4 And LiOH·H 2 O, the molar ratio of Ni:Co:Mn:Li is 0.33:0.33:0.33:0.05. Pure water is added to the weighed raw materials to prepare slurry. Then, under stirring, the slurry is wet-pulverized with a circulating medium-stirred wet bead mill until the average particle diameter of the solid is 0.20 μm.
[0220] The slurry is then spray-dried with a spray dryer to form approximately spherical granulated particles with a diameter of approximately 6 μm and composed of nickel, cobalt, manganese, and lithium raw materials. LiOH powder with a median particle diameter of 3 μm was added to the granulated particles thus obtained so that the molar ratio of Li was 1.00 with respect to the total number of moles of Ni, Co, and Mn, and then mixed with a high-speed stirrer. Thus, a mixture powder of granulated particles made of Ni, Co, Mn and lithium raw materials and lithium raw m...
Example Embodiment
[0221] Example 3
[0222] Except for using CoOOH as the cobalt raw material, the operation was performed in the same manner as in Example 2, thereby obtaining lithium composite oxide particles (hereinafter referred to as "lithium composite oxide particles of Example 3").
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