Preparation method of single crystal type high-nickel ternary layered positive electrode material
A positive electrode material and ternary material technology, which is applied in the field of preparation of high-nickel ternary positive electrode materials, can solve problems such as high temperature flatulence, affecting electrochemical performance, and poor thermal stability
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[0023] Example 1
[0024] The single crystal structure ternary positive material LINI is prepared according to the following steps. 0 8 CO 0.1 Mn 0.1 O 2 .
[0025] 1) 2.41g CO 3 O 4 , 1.45g LiOH H 2 O and 9.10g KNO 3 The mixture was mixed well, and the mixture A was applied to the alumina crucible, and 500 ° C in the muffle furnace was pre-warmed to 750 ° C for 15 h, then cooled to room temperature, the resulting product was removed Water wash and filtered, dried at 120 ° C for 24 h, gave a single crystal Liicoo 2 Matrix.
[0026] 2) Weigh 57.04G NICL 2 · 6h 2 O, 5.94G mncl 2 · 4h 2 O and 11.33G LiOH · H 2 O, with the above 2.94G Liicoo 2 The substrate is mixed with uniform, resulting in a mixture B.
[0027] 3) The mixture B is pressed into pieces, the pressure is 20 MPa, and the tablet time is 2 min, and the crucible is placed in the tube furnace. The tube furnace is calcined under the oxygen atmosphere, first pre-fired at 500 ° C for 5 h, and then warm to 750 ° C insulation 15...
Example Embodiment
[0029] Example 2
[0030] The single crystal structure ternary positive material LINI is prepared according to the following steps. 0 6 CO 0.2 Mn 0.2 O 2 .
[0031] 1) Weigh 2.41g CO 3 O 4 , 1.45g LiOH H 2O and 5.26 g of NaCl sufficiently polished mixed, mixture A, and the mixture A was mounted in the alumina crucible, and 500 ° C in the muffle furnace was pre-warmed to 850 ° C for 15 h, then cooled to room temperature, will The resulting product was washed with deionized water and filtered, dried at 120 ° C for 24 h, and obtained a single crystal Liicoo. 2 Matrix.
[0032] 2) Weigh 23.65G NISO 4 · 6h 2 O, 5.07G MNSO 4 · H 2 O and 4.43G Li 2 CO 3 , With the above 2.94glicoo 2 The substrate grinding is mixed.
[0033] 3) The above mixed material is pressed into pieces, the pressure is 20 MPa, and the tablet time is 2 min, and the crucible is placed and calcined under the oxygen atmosphere, first at 650 ° C for 5 h, and then warmed to 800 ° C for 15h. Subsequently, it is cooled to r...
Example Embodiment
[0035] Example 3
[0036] The single crystal structure ternary positive material LINI is prepared according to the following steps. 0 5 CO 0.2 Mn 0.3 O 2 .
[0037] 1) 2.41g CO 3 O 4 , 1.45g LiOH H 2 O and 6.71 g of KCl mixed well mixed, mixture A, and the mixture A was mounted in the alumina crucible, and 500 ° C in the muffle furnace was pre-warmed to 800 ° C for 15 h, then cooled to room temperature, will The resulting product was washed with deionized water and filtered, dried at 120 ° C for 24 h, and obtained a single crystal Liicoo. 2 Matrix.
[0038] 2) Weigh 21.81G Ni (NO 3 ) 2 · 6h 2 O, 11.30G Mn (NO 3 ) 2 · 4h 2 O and 4.43G Li 2 CO 3 , With the above 2.94G Liicoo 2 The substrate is mixed with uniform, resulting in a mixture B.
[0039] 3) The mixture B is pressed into pieces, the pressure is 20 MPa, the tablet time is 2 min, and the crucible is placed and calcined in the tube furnace, first before 650 ° C, and then warm to 850 ° C for 15h Then, cool to room temperature, ...
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