Porous current collector, preparation method thereof, and lithium battery
A porous current collector and lithium battery technology, applied in the direction of electrode carrier/current collector, etc., can solve the problems of increasing the contact area between active materials and electrolyte, improving battery energy density and cycle life, and low space utilization of current collectors , to reduce the probability of piercing the separator, inhibit the formation of lithium dendrites, and reduce the production cost
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0034] The preparation method steps of negative electrode current collector of the present invention are as follows:
[0035] Add the polymer, lithium salt and inorganic filler (when containing inorganic filler) into the solvent for mixing, and make a solution or suspension after stirring evenly;
[0036] Use a porous current collector as the current collector substrate, coat the prepared solution or suspension on the current collector substrate, or immerse the current collector substrate in the prepared solution or suspension to allow the solution or suspension to adhere Take it out after it is on the current collector substrate;
[0037] The current collector matrix is dried to obtain a porous current collector with a solid electrolyte layer attached to the surface of the current collector matrix and the inner surface of the pores.
[0038] When the solid electrolyte layer on the surface of the current collector matrix and the inner surface of the hole has two or more lay...
Embodiment 1
[0042] Polyethylene oxide and LiN(CF 3 SO 2 ) 2 Dissolve in acetonitrile, stir uniformly to form a solution, wherein the quality of polyethylene oxide accounts for 4% of the total mass of the solution, LiN(CF 3 SO 2 ) 2 The mass accounts for 1.5% of the total mass of the solution;
[0043] The resulting solution is coated on a copper foam with a thickness of 1 mm;
[0044] After drying at room temperature for 24 hours, a porous current collector with a solid electrolyte layer was obtained.
[0045] Cut the porous current collector into a rectangular piece with a length of 79 mm and a width of 45 mm as the negative electrode sheet, cut the aluminum foil into a rectangular foil with a length of 95 mm and a width of 40 mm, and coat one side of the aluminum foil with lithium cobalt oxide The area of the battery is smaller than the area of the negative pole piece to make the positive pole piece; stack the negative pole piece, diaphragm, and positive pole piece in order, p...
Embodiment 2
[0047] The difference between this embodiment and embodiment 1 is that polyethylene oxide and LiN(CF 3 SO 2 ) 2 After being dissolved in acetonitrile and stirring evenly to form a solution (the quality of polyethylene oxide accounts for 4% of the total mass of the solution, LiN(CF 3 SO 2 ) 2 The quality accounts for 1.5% of the total mass of the solution), adding lithium lanthanum zirconate to the solution, stirring to form a suspension, wherein the quality of lithium lanthanum zirconate accounts for 5% of the total mass of the suspension;
[0048] The resulting suspension is coated on foamed copper with a thickness of 1mm;
[0049] After drying at room temperature for 24 hours, a porous current collector with a solid electrolyte layer was obtained.
[0050] Cut the porous current collector into a rectangular piece with a length of 79mm and a width of 45mm, and use it as the negative pole piece, stack it with the separator and the positive pole piece in sequence, after pa...
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| density | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More