Method for modifying positive aluminum foil current collector by utilizing phosphoric acid-fluorine-dichromate
A dichromate and current collector technology, applied in the direction of electrode carrier/current collector, battery electrode, hybrid capacitor current collector, etc., can solve the problems of high cost, complicated preparation process and limited effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0011] The aluminum foil was treated with a treatment solution at 51° C. for 5 minutes, rinsed with water, and finally dried naturally to obtain a modified positive electrode aluminum foil current collector.
[0012] The composition of the treatment solution is as follows: sodium dihydrogen phosphate 15 g / L, sodium fluoride 6 g / L, potassium dichromate 5 g / L, 36 w.t.% hydrochloric acid 4 g / L.
[0013] The positive electrode aluminum foil current collector modified with phosphoric acid-fluorine-dichromate is folded in half 180° and returned to the original state, which is recorded as 180°, and then folded 180° is recorded as 360°, and so on. Tests have shown that the prepared modified positive electrode aluminum foil can be folded continuously at 6300° without breaking. Dissolve 3 g of polyvinylidene fluoride resin in 29 ml of dimethylacetamide to prepare viscose. The adhesive is coated on the aluminum foil current collector, and the peel strength reaches 0.0671 N / mm after heat...
Embodiment 2
[0016] The aluminum foil was treated with a treatment solution at 78 °C for 30 min, rinsed with water, and finally dried with hot air at 180 °C to obtain a modified positive electrode aluminum foil current collector.
[0017] The composition of the treatment liquid is as follows: sodium dihydrogen phosphate 19g / L, sodium fluoride 10g / L, potassium dichromate 6g / L, 37 w.t.% concentrated hydrochloric acid 6g / L.
[0018] When the prepared modified positive electrode aluminum foil current collector is used as the positive electrode current collector of the lithium ion battery, it has the advantages of good folding resistance, strong adhesion with the positive electrode material, small impedance, and excellent charge and discharge performance.
Embodiment 3
[0020] The aluminum foil was treated with a treatment solution at 35°C for 1 min, rinsed with water, and finally dried with hot air at 70°C to obtain a modified positive electrode aluminum foil current collector.
[0021] The composition of the treatment solution is as follows: sodium dihydrogen phosphate 10 g / L, sodium fluoride 2 g / L, potassium dichromate 3 g / L, 37 w.t.% concentrated hydrochloric acid 2 g / L.
[0022] When the prepared modified positive electrode aluminum foil current collector is used as the positive electrode current collector of the lithium ion battery, it has the advantages of good folding resistance, strong adhesion with the positive electrode material, small impedance, and excellent charge and discharge performance.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More