ELECTROCHEMICAL DEVICE INCLUDING PROTECTIVE LAYER, AND ELECTRONIC DEVICE
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United States of America
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Issued Date -
Jan 16, 2025
app pub date -
Sep 30, 2024
filing date -
Sep 30, 2024
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Abstract
An electrochemical device, including a positive electrode, where the positive electrode includes a positive electrode current collector, a first protective layer, and a first positive electrode active material layer. The positive electrode current collector includes a first surface and a second surface opposite to each other, and the first protective layer is disposed between the first surface and the first positive electrode active material layer. The first surface includes a first region and a second region, where the first region is provided with the first positive electrode active material layer, and the second region is not provided with the first positive electrode active material layer. An area of the first region is A1 cm2, an area of the second region is A2 cm2, and an area of the first protective layer is A3 cm2, satisfying: 0.5≤A3/(A1+A2)≤1. The electrochemical device of this application has significantly improved safety performance.
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