Surface treatment composition, electrode and preparation method thereof, secondary battery, and device

The surface treatment composition according to claim 1, wherein the first ingredient comprises a substance represented by following general formula:

• in the general formula:
• one or more of R11, R12, R21, R22, R31, R32, R41, R42, R51, or R52 are the acidic group and/or the salt of the acidic group, and remaining groups are selected from hydrogen, C1 to C6 alkyl, C1 to C6 haloalkyl, and halogen;
• and
• n1 is an integer greater than or equal to 1. 15 7. The surface treatment composition according to claim 6, wherein one or more of R11, R12, R21, R22, R31, R32, R41, R42, R51, or R52 are selected from a carboxylic acid group, a sulfonic acid group, a phosphoric acid group, a carboxylate group, a sulfonate group, or a phosphonate group.