A poly(vinylphosphonic acid) (PVPA)−(NH.sub.4).sub.2MoO.sub.4), gel polymer electrolyte can be prepared by incorporating redox-mediated Mo, or similar metal, into a PVPA, or similar polymer, matrix. Gel polymer electrolytes including PVPA/MoX, x representing the percent fraction Mo in PVPA, can be used to make supercapacitors including active carbon electrodes. The electrolytes can be in gel form, bendable and stretchable in a device. Devices including this gel electrolyte can have a specific capacitance (Cs) of 1276 F/g, i.e., a more than 50-fold increase relative to a PVPA system without Mo. A PVPA/Mo10 supercapacitor can have an energy density of 180.2 Wh/kg at power density of 500 W/kg, and devices with this hydrogel structure may maintain 85+% of their initial capacitance performance after 2300 charge-discharge cycles.

A poly(vinylphosphonic acid) (PVPA)−(NH.sub.4).sub.2MoO.sub.4), gel polymer electrolyte can be prepared by incorporating redox-mediated Mo, or similar metal, into a PVPA, or similar polymer, matrix. Gel polymer electrolytes including PVPA/MoX, x representing the percent fraction Mo in PVPA, can be used to make supercapacitors including active carbon electrodes. The electrolytes can be in gel form, bendable and stretchable in a device. Devices including this gel electrolyte can have a specific capacitance (Cs) of 1276 F/g, i.e., a more than 50-fold increase relative to a PVPA system without Mo. A PVPA/Mo10 supercapacitor can have an energy density of 180.2 Wh/kg at power density of 500 W/kg, and devices with this hydrogel structure may maintain 85+% of their initial capacitance performance after 2300 charge-discharge cycles.

A polymer having a structural unit represented by the following Chemical Formula 1,

##STR00001##

where R.sub.1 represents hydrogen or a methyl group, L.sub.1 represents —COO—, —CONH—, or a single bond, X represents a hydrocarbon group having 2 to 10 carbon atoms or a hydrocarbon group having 2 to 10 carbon atoms and containing oxygen, L.sub.2 represents —O— or —NH—, Y represents a hydrocarbon group having 2 to 12 carbon atoms, and L.sub.3 represents —NH—C.sub.2H.sub.4—R.sub.2, —O-Ph-CH.sub.2CH(R.sub.2).sub.2, or —O—Np—CH.sub.2CH(R.sub.2).sub.2, where Ph represents a phenylene group, Np represents a naphthylene group, and R.sub.2 represents a phosphonic acid group.

A polymer having a structural unit represented by the following Chemical Formula 1,

##STR00001##

where R.sub.1 represents hydrogen or a methyl group, L.sub.1 represents —COO—, —CONH—, or a single bond, X represents a hydrocarbon group having 2 to 10 carbon atoms or a hydrocarbon group having 2 to 10 carbon atoms and containing oxygen, L.sub.2 represents —O— or —NH—, Y represents a hydrocarbon group having 2 to 12 carbon atoms, and L.sub.3 represents —NH—C.sub.2H.sub.4—R.sub.2, —O-Ph-CH.sub.2CH(R.sub.2).sub.2, or —O—Np—CH.sub.2CH(R.sub.2).sub.2, where Ph represents a phenylene group, Np represents a naphthylene group, and R.sub.2 represents a phosphonic acid group.

The invention is a phosphorylcholine group-containing vinyl monomer represented by the following formula (1):

##STR00001##

in the formula (1) R represents an alkylene group having 1 to 6 carbon atoms, and n represents an integer of 1 to 6.

The invention provides a phosphorylcholine group-containing vinyl monomer useful as a raw material for a hydrogel having a lowered water content while maintaining surface hydrophilicity.

The invention is a phosphorylcholine group-containing vinyl monomer represented by the following formula (1):

##STR00001##

in the formula (1) R represents an alkylene group having 1 to 6 carbon atoms, and n represents an integer of 1 to 6.

The invention provides a phosphorylcholine group-containing vinyl monomer useful as a raw material for a hydrogel having a lowered water content while maintaining surface hydrophilicity.

A dispersant for a lithium ion battery and a preparation method thereof, a positive slurry, and a lithium ion battery are provided. The dispersant includes a structural unit A derived from N-vinylpyrrolidone, a structural unit B derived from a conjugated diene monomer, and a structural unit C derived from an organic acid monomer. The organic acid monomer includes one or more of an unsaturated sulfonic acid monomer, an unsaturated phosphoric acid monomer, and an unsaturated carboxylic acid monomer.

A dispersant for a lithium ion battery and a preparation method thereof, a positive slurry, and a lithium ion battery are provided. The dispersant includes a structural unit A derived from N-vinylpyrrolidone, a structural unit B derived from a conjugated diene monomer, and a structural unit C derived from an organic acid monomer. The organic acid monomer includes one or more of an unsaturated sulfonic acid monomer, an unsaturated phosphoric acid monomer, and an unsaturated carboxylic acid monomer.

A poly(vinylphosphonic acid) (PVPA)-(NH.sub.4).sub.2MoO.sub.4), gel polymer electrolyte can be prepared by incorporating redox-mediated Mo, or similar metal, into a PVPA, or similar polymer, matrix. Gel polymer electrolytes including PVPA/MoX, x representing the percent fraction Mo in PVPA, can be used to make supercapacitors including active carbon electrodes. The electrolytes can be in gel form, bendable and stretchable in a device. Devices including this gel electrolyte can have a specific capacitance (Cs) of 1276 F/g, i.e., a more than 50-fold increase relative to a PVPA system without Mo. A PVPA/Mo10 supercapacitor can have an energy density of 180.2 Wh/kg at power density of 500 W/kg, and devices with this hydrogel structure may maintain 85+% of their initial capacitance performance after 2300 charge-discharge cycles.

A poly(vinylphosphonic acid) (PVPA)-(NH.sub.4).sub.2MoO.sub.4), gel polymer electrolyte can be prepared by incorporating redox-mediated Mo, or similar metal, into a PVPA, or similar polymer, matrix. Gel polymer electrolytes including PVPA/MoX, x representing the percent fraction Mo in PVPA, can be used to make supercapacitors including active carbon electrodes. The electrolytes can be in gel form, bendable and stretchable in a device. Devices including this gel electrolyte can have a specific capacitance (Cs) of 1276 F/g, i.e., a more than 50-fold increase relative to a PVPA system without Mo. A PVPA/Mo10 supercapacitor can have an energy density of 180.2 Wh/kg at power density of 500 W/kg, and devices with this hydrogel structure may maintain 85+% of their initial capacitance performance after 2300 charge-discharge cycles.