Method for preparing heat-resistant liquid-holding lithium battery diaphragm
A lithium battery separator, heat-resistant technology, applied in battery pack parts, circuits, electrical components, etc., can solve the problems of poor wettability, shorten battery life, accelerate lithium-ion battery damage, etc., and achieve the effect of strong heat resistance
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[0026] Example 1
[0027] Preparation of primary alumina flakes:
[0028] A circular aluminum sheet with a diameter of 16 mm was placed in 100 mL of absolute ethanol for ultrasonic treatment for 8 min, and then the circular aluminum sheet was taken out and placed in 120 mL of 10% sodium hydroxide solution for ultrasonic treatment for 10 min, and the ultrasonic frequency was controlled to 30 kHz. The surface-treated aluminum flakes are obtained, and the surface-treated aluminum flakes are washed three times with deionized water to obtain anode aluminum flakes. The sheet is used as the anode, and the untreated high-purity aluminum sheet is placed in the mixed solution as the cathode, and polished at a voltage of 15V to obtain a polished anode aluminum sheet;
[0029] The graphite rod as the cathode and the above-mentioned polished anode aluminum sheet as the anode were placed in a beaker containing an oxalic acid solution with a mass fraction of 30%, the distance between the po...
Example Embodiment
[0036] Example 2
[0037] Preparation of primary alumina flakes:
[0038] A circular aluminum sheet with a diameter of 17 mm was placed in 110 mL of absolute ethanol for ultrasonic treatment for 9 min, and the circular aluminum sheet was taken out and placed in 135 mL of 10% sodium hydroxide solution for ultrasonic treatment for 11 min, and the ultrasonic frequency was controlled to 32 kHz. The surface-treated aluminum sheet is obtained, and the surface-treated aluminum sheet is washed with deionized water for 4 times to obtain an anode aluminum sheet. The sheet is used as the anode, and the untreated high-purity aluminum sheet is placed in the mixed solution as the cathode, and polished at a voltage of 17V to obtain a polished anode aluminum sheet;
[0039] The graphite rod was used as the cathode, and the above-mentioned polished anode aluminum sheet was used as the anode into a beaker containing an oxalic acid solution with a mass fraction of 30%. In a water bath, electro...
Example Embodiment
[0046] Example 3
[0047] Preparation of primary alumina flakes:
[0048] A circular aluminum sheet with a diameter of 18 mm was placed in 120 mL of absolute ethanol for ultrasonic treatment for 10 min, and the circular aluminum sheet was taken out and placed in 150 mL of 10% sodium hydroxide solution for ultrasonic treatment for 12 min, and the ultrasonic frequency was controlled to 35 kHz. The surface-treated aluminum sheet is obtained, and the surface-treated aluminum sheet is washed with deionized water for 5 times to obtain an anode aluminum sheet. The sheet is used as an anode, and the untreated high-purity aluminum sheet is placed in the mixed solution as a cathode, and polished at a voltage of 20V to obtain a polished anode aluminum sheet;
[0049] The graphite rod as the cathode and the above-mentioned polished anode aluminum sheet as the anode were placed in a beaker containing an oxalic acid solution with a mass fraction of 30%, the distance between the positive an...
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