A kind of preparation method of high tap density electrode material
A technology of electrode material and tap density, which is applied in electrode manufacturing, electrode rolling/calendering, etc., can solve the problems of active materials falling off easily, density cannot be increased, and thickness is difficult to reduce, so as to reduce the drop-off rate and increase energy density and storage capacity, reducing the effect of energy storage attenuation
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Embodiment 1
[0036] S1, mixing lithium iron phosphate, carbon powder, and polypropylene binder in a mass ratio of 90:3:7 to prepare a mixture;
[0037] S2, stirring the mixture in S1 at room temperature and high speed to prepare a slurry;
[0038] S3, uniformly coating the slurry in S2 on the aluminum foil to make an electrode material;
[0039] S4, place the electrode material in S3 at a temperature of 40°C, and bake until the humidity of the slurry on the surface of the electrode material is about 20%;
[0040] S5. In a vacuum state, put the baked electrode material of S4 into an ultra-high pressure static pressure equipment with a pressure of 0.08 MPa, set the static pressure to 300 MPa, press until the pressure reaches 300 MPa, and hold the pressure for 5 minutes to obtain aluminum with a high tap density. electrode material.
Embodiment 2
[0042] S1, mixing lithium iron phosphate, carbon powder, and styrene-butadiene rubber emulsion binder in a ratio of 90:3:7 by mass to obtain a mixture;
[0043] S2, stirring the mixture in S1 at room temperature and high speed to prepare a slurry;
[0044] S3, uniformly coating the slurry in S2 on the copper foil to make an electrode material;
[0045] S4, place the electrode material in S3 at a temperature of 45°C, and bake until the humidity of the slurry on the surface of the electrode material is about 20%;
[0046] S5. In a vacuum state, put the baked electrode material of S4 into an ultra-high pressure static pressure equipment with a pressure of 0.1 MPa, set the static pressure to 400 MPa, press until the pressure reaches 400 MPa, and hold the pressure for 5 minutes to obtain copper with a high tap density. electrode material.
Embodiment 3
[0048] S1, mixing lithium iron phosphate, carbon powder, and SBR emulsion binder in a mass ratio of 90:3:7 to prepare a mixture;
[0049] S2, stirring the mixture in S1 at room temperature and high speed to prepare a slurry;
[0050] S3, uniformly coating the slurry in S2 on the lead plate to make an electrode material;
[0051] S4, place the electrode material in S3 at a temperature of 50°C, and bake until the humidity of the slurry on the surface of the electrode material is about 20%;
[0052] S5. In a vacuum state, put the baked electrode material of S4 into an ultra-high pressure static pressure equipment with a pressure of 0.1 MPa, set the static pressure to 600 MPa, press until the pressure reaches 600 MPa, and hold the pressure for 5 minutes to obtain lead with high tap density electrode material.
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