Cathode active material for lithium secondary battery and lithium secondary battery
A lithium secondary battery, positive electrode technology, applied in the direction of secondary battery charging/discharging, secondary battery, secondary battery repair/maintenance, etc. Capacity characteristics and high temperature characteristics, etc.
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preparation example 1
[0089] By adding Ni 0.88 co 0.09 mn 0.03 (OH) 2 , LiOH, ZrO 2 and Al(OH) 3 Al and Zr-doped lithium complex transition metal oxide powders were prepared by dry blending and firing the mixture at 760° C. for 12 hours.
[0090] In combining the lithium composite transition metal oxide prepared as described above with H 3 BO 3 After mixing, the mixture was heat-treated at 350° C. for three hours, thereby forming a B-containing coating on the surface of the lithium composite transition metal oxide.
[0091] The obtained lithium composite transition metal oxide powder had a bimodal particle size distribution in which particles of 16 μm and particles of 5 μm were mixed.
preparation example 2
[0093] By adding Ni 0.88 co 0.09 mn 0.03 (OH) 2 , LiOH, ZrO 2 、WO 3 and Al(OH) 3 Lithium composite transition metal oxides doped with Al, Zr and W were prepared by dry mixing and firing the mixture at 740° C. for 12 hours.
[0094] In combining the lithium composite transition metal oxide prepared as described above with H 3 BO 3 After mixing, the mixture was heat-treated at 350° C. for three hours, thereby forming a B-containing coating on the surface of the lithium composite transition metal oxide.
[0095] The obtained lithium composite transition metal oxide powder had a monomodal particle size distribution with a D50 of 5 μm.
preparation example 3
[0097] By adding Ni 0.90 co 0.08 mn 0.02 (OH) 2 , LiOH, TiO 2 and WO 3 Lithium composite transition metal oxides doped with Ti and W were prepared by dry mixing and firing the mixture at 760 °C for 12 hours.
[0098] In combining the lithium composite transition metal oxide prepared as described above with H 3 BO 3 After mixing, the mixture was heat-treated at 350° C. for three hours, thereby forming a B-containing coating on the surface of the lithium composite transition metal oxide.
[0099] The obtained lithium composite transition metal oxide powder had a monomodal particle size distribution with a D50 of 16 μm.
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