Multi-functionally modified polymer binder for lithium ion batteries and use thereof in electrochemical energy storage devices

A multi-functionally modified polymer binder for lithium ion batteries, wherein the multi-functionally modified polymer binder is prepared by a Michael addition reaction, with a biomass polymer or a synthetic polymer as a substrate, and with a hydrophilic monomer and a lipophilic monomer as functionally modifying monomers;

• the biomass polymer is one or more selected from the group consisting of arabic gum, cyclodextrin, cellulose derivative, xanthan gum, pectin, gelatin, starch, and sesbania gum;
• the synthetic polymer is one or more selected from the group consisting of polyethyleneimine, polyethylene glycol and polyhydroxy polybutadiene;
• the hydrophilic monomer is at least one of monomers having a structure of CH2═CR1R2, wherein R1 is selected from the group consisting of —H, —CH3 and —CH2CH3, and R2 is selected from the group consisting of —COOH, —COOM and —CONH2, wherein M is selected from Li, Na or K;
• the lipophilic monomer is at least one of monomers having a structure of CH2═CR3R4, wherein R3 is selected from the group consisting of —H, —CH3 and —CH2CH3, and R4 is at least one selected from the group consisting of —CN, —OCOCH3, —CONHCH3, —CON(CH3)2, —CH═CH2, -Ph-R5 and —COOR6, wherein R5 is —H or any substituent other than —H, and R6 is selected from at least one of C1-C8 alkyl groups;
• a weight ratio of the biomass polymer or the synthetic polymer, the hydrophilic monomer and the lipophilic monomer is 1:0-100:0-100;
• wherein the Michael addition reaction is performed with one or more of the hydrophilic monomers and the lipophilic monomers and catalyzed by a base catalyst;
• an amount of the base catalyst is 0.01-5 wt % of a total weight of the hydrophilic monomers and the lipophilic monomers.