Separator, and electrochemical device and electronic device comprising same
Number of patents in Portfolio can not be more than 2000
United States of America
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Feb 8, 2022
Grant Date -
Oct 1, 2020
app pub date -
Sep 9, 2019
filing date -
Sep 9, 2019
priority date (Note) -
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Abstract
The present application relates to a composite separator, and an electrochemical device and an electronic device comprising the same. Some embodiments of the present application provide a composite separator, comprising: a first porous substrate and a cation exchange layer, wherein the cation exchange layer comprises a second porous substrate grafted with a functional group, wherein the functional group is selected from the group consisting of an alkali-metal-sulfonic functional group, an alkali-metal-phosphoric functional group and a combination thereof. The composite separator of the present application can effectively capture the transition metal ions eluted from a cathode through the cation exchange layer, thereby reducing the deposition of the transition metal ions on an anode and the self-discharge rate of the electrochemical device. Therefore, the electrochemical stability and cycling performance of the electrochemical device are enhanced, and the safety of the electrochemical device is also significantly improved.
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