Lithium supplementing diaphragm of lithium ion battery
A lithium-ion battery and lithium-replenishing technology, applied in secondary batteries, battery pack components, circuits, etc., can solve problems such as actual capacity attenuation, etching of negative electrode active layers, etc., to improve efficiency, avoid side reactions, and reduce production. effect of steps
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[0036] Example 1
[0037] A lithium replenishing diaphragm for a lithium ion battery, the lithium replenishing diaphragm includes a plurality of mutually superimposed diaphragm layers, a metal lithium layer is arranged on the diaphragm layer, and a protective layer is also arranged on the metal lithium layer .
[0038] The diaphragm layer is a single-layer polypropylene diaphragm with a thickness of 20 μm. The protective layer is LiPON with a thickness of 10nm. The thickness of the metal lithium layer is 3 μm.
[0039] The preparation method of the lithium supplementary diaphragm includes the following steps:
[0040] (1) Place the diaphragm layer in a vacuum chamber, the horizontal distance between the evaporation lithium source and the diaphragm layer is 40cm, and vacuum until the cavity vacuum degree reaches 3*10 -4 Below Pa, and turn on the cooling water circulation system to ensure that the temperature of the diaphragm layer is controlled at 20-30°C. The physical form of the va...
Example Embodiment
[0044] Example 2
[0045] A lithium replenishing diaphragm for a lithium ion battery, the lithium replenishing diaphragm includes a plurality of mutually superimposed diaphragm layers, a metal lithium layer is arranged on the diaphragm layer, and a protective layer is also arranged on the metal lithium layer .
[0046] The diaphragm layer is a single-layer polypropylene diaphragm with a thickness of 20 μm. The protective layer is Al with a thickness of 10 nm. The thickness of the metal lithium layer is 3 μm.
[0047] The preparation method of the lithium supplementary diaphragm includes the following steps:
[0048] (1) Place the diaphragm layer in a vacuum chamber, the horizontal distance between the evaporation lithium source and the diaphragm layer is 40cm, and vacuum until the cavity vacuum degree reaches 3*10 -4 Pa below, and turn on the cooling water circulation system to ensure that the temperature of the diaphragm layer is controlled at 20-30°C. The physical form of the vapo...
Example Embodiment
[0050] Example 3
[0051] A lithium replenishing diaphragm for a lithium ion battery, the lithium replenishing diaphragm includes a plurality of mutually superimposed diaphragm layers, a metal lithium layer is arranged on the diaphragm layer, and a protective layer is also arranged on the metal lithium layer .
[0052] The diaphragm layer is a single-layer PP coated with aluminum oxide and has a thickness of 40 μm. The protective layer is LiPON with a thickness of 10nm. The thickness of the metal lithium layer is 3 μm.
[0053] The preparation method of the lithium supplementary diaphragm includes the following steps:
[0054] (1) Place the diaphragm layer in a vacuum chamber, the horizontal distance between the evaporation lithium source and the diaphragm layer is 30cm, and vacuum until the vacuum degree of the chamber reaches 3*10 -4 Pa below, and turn on the cooling water circulation system to ensure that the temperature of the diaphragm layer is controlled at 20-30°C. The physic...
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