BORIC ACID DERIVATIVE MODIFIED BINDER AND LITHIUM-ION BATTERY INCLUDING SAME

WIPO Patent Application WO/2022/194172

A1

Provided are a boric acid derivative modified binder and a lithium-ion battery including same. The surfaces of emulsion colloidal particles of the binder are rich in boric acid groups (-B(OH)2). When applied to a battery electrode plate, the boric acid groups can be subjected to a dehydration condensation reaction with -OH in a dispersant of sodium carboxymethyl cellulose, or with -OH in a functional monomer during the drying of the electrode plate to form a three-dimensional network, such that the binding force is increased and the peeling strength of the electrode plate is greatly improved. The binder can also significantly improve the cycling performance of a lithium-ion battery, such that the cycle life of the lithium-ion battery is prolonged; compared with a conventional binder, a lithium-ion battery using the binder of the present application has a higher cycle capacity retention rate, and the expansion rate of the cycled lithium-ion battery is lower, such that the expansion rate of the lithium-ion battery after long-term use can be significantly inhibited, and the low-temperature performance of the lithium-ion battery using the binder of the present application is also significantly improved.

CHU LIN (CN)
GUO PANLONG (CN)
CHEN WEIPING (CN)
LI SULI (CN)
LI JUNYI (CN)

PCT/CN2022/081028

September 22, 2022

March 15, 2022

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ZHUHAI COSMX BATTERY CO LTD (CN)

C08F236/10; C08F212/08; C08F212/36; C08F220/06; C08F220/18; C08F230/06; C09J133/08; C09J147/00; H01M4/62; H01M10/0525

CN113045702A	2021-06-29
CN105612442A	2016-05-25
CN108341943A	2018-07-31
CN107805308A	2018-03-16
CN111234105A	2020-06-05

LEADER PATENT & TRADEMARK FIRM (CN)

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