A high-voltage resistant all-solid-state lithium battery interface layer and its in-situ preparation method and application
An in-situ preparation and interface layer technology, which is applied in the manufacture of electrolyte batteries, secondary batteries, solid electrolytes, etc., can solve problems such as increasing contact resistance, forming a space charge layer, and poor contact, reducing interface resistance and improving oxidation. The effect of decomposing potential and increasing specific energy
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[0034] (1) Precursor preparation: 100g trifluoroethyl methacrylate monomer and 100g lithium trifluoromethanesulfonylimide LiTFSI were mixed in an inert gas-protected glove box, and 3g initiator azobisisobutyronitrile ( AIBN), stirring for 4h until the lithium salt is fully dissolved, the water content in the glove box is less than 0.1ppm, and the oxygen content is less than 0.1ppm;
[0035] (2) Assemble the battery, smear the precursor on the opposite side between the positive electrode and the ether-based electrolyte matrix, and assemble the prepared positive electrode, negative electrode and ether-based electrolyte matrix into a battery in the glove box;
[0036] (3) Electrochemically initiate polymerization, transfer the assembled battery to an oven, set the oven temperature to 60 degrees Celsius, keep warm for 2 hours, charge the battery, set the current rate to 0.1C, and start from the initial voltage of 2.8V. Flow charging, charge to 4.3V stop.
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