A kind of nickel cobalt lithium manganese oxide precursor and its preparation method
A technology of nickel cobalt lithium manganate and secondary particles, which is applied in the field of nickel cobalt lithium manganate precursor and its preparation, can solve the problem that the description, the influence of cathode material performance, capacity, rate performance and cycle performance have not been significantly improved and improved and other problems to achieve the effect of large particle size
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Embodiment 1
[0052] a kind of like Figure 1-Figure 7 The nickel-cobalt-lithium-manganese-oxide precursor of the agglomerated secondary particle of the nanosheet of the present invention is shown, and the molecular formula of the nickel-cobalt lithium-manganate precursor is Ni 0.6 co 0.2 mn 0.2 (OH) 2 The internal growth mode of the crystal of the nickel cobalt lithium manganese oxide precursor is hexagonal nanosheets stacking, the side length of the hexagonal nanosheets of the primary particles is 350-450nm, and the thickness is 80-120nm. The particle size of the hexagonal nanosheets reunited secondary particles D10=6.37μm, D50=11.95μm, D90=21.39μm (see figure 1 ). The 001 crystal face half width F001=0.28 of this high-nickel type nickel cobalt lithium manganate precursor Figure 7 ),Such as Figure 6 As shown, the particle profile shows that the crystal interior is packed with hexagonal sheets. The tap density of the nickel cobalt lithium manganese oxide precursor is 2.3g / cm 3 , ...
Embodiment 2
[0072] a kind of like Figure 15-Figure 21 The nickel-cobalt-lithium-manganese-oxide precursor of the agglomerated secondary particle of the nanosheet of the present invention is shown, and the molecular formula of the nickel-cobalt lithium-manganate precursor is Ni 0.6 co 0.2 mn 0.2 (OH) 2 The internal growth mode of the crystal of the nickel cobalt lithium manganese oxide precursor is hexagonal nanosheets stacking, the side length of the hexagonal nanosheets of the primary particles is 300nm, and the thickness is 80-100nm. =6.85μm, D50=11.53μm, D90=19.51μm (see Figure 15 ). The 001 crystal plane half-peak width F001=0.4 of this high-nickel type nickel-cobalt lithium manganate precursor Figure 21 ),Such as Figure 20 As shown, the particle profile shows that the crystal interior is packed with hexagonal sheets. The tap density of the nickel cobalt lithium manganese oxide precursor is 2.2g / cm 3 , the specific surface area is 5.14m 2 / g, bulk density 1.73g / cm 3 , S ...
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