Electrolyte flame-retardant additive material with triphenyl phosphate and polydopamine microcapsule structure and synthesis method of electrolyte flame-retardant additive material

Abstract

The invention discloses an electrolyte flame-retardant additive material with a triphenyl phosphate and polydopamine microcapsule structure and a synthesis method, and relates to the technical field of battery flame-retardant materials, the flame-retardant additive material comprises the following components: triphenyl phosphate, absolute ethyl alcohol, deionized water, tris (hydroxymethyl) aminomethane and dopamine hydrochloride. The preparation method comprises the following steps: S1, weighing: dissolving triphenyl phosphate in absolute ethyl alcohol; s2, weighing tris (hydroxymethyl) aminomethane, and dissolving the tris (hydroxymethyl) aminomethane in deionized water; s3, adding the ethanol mixed solution into the deionized water mixed solution, and stirring to obtain a mixed solution; and S4, weighing dopamine hydrochloride, adding the dopamine hydrochloride into the mixed solution, and mechanically stirring to obtain the electrolyte flame-retardant additive material. According to the flame-retardant additive material prepared by the invention, surface modification can be carried out on a flame retardant through a capsule shell, and the application range of the flame retardant is expanded; the intelligent release of the flame retardant improves the application effect of the flame retardant.

Description

technical field

[0001] The invention relates to the technical field of flame-retardant materials for batteries, in particular to an electrolyte flame-retardant additive material with a triphenyl phosphate@polydopamine microcapsule structure and a synthesis method. Background technique

[0002] With the depletion of fossil energy, new energy vehicles have gradually become the mainstream of the times. Lithium-ion batteries have significant advantages such as high energy density, good cycle performance, and weak memory effect, and have become the first choice for energy and power of electric vehicles today.

[0003] However, while effectively providing power, lithium-ion batteries also face extreme conditions of electrical abuse, thermal abuse, and mechanical abuse. These working conditions are likely to cause a short circuit or a violent exothermic reaction of the lithium-ion battery, resulting in thermal runaway of the lithium-ion battery. Thermal runaway will inevitably br...

Examples

Embodiment 1

[0027] An electrolyte flame retardant additive material with a triphenyl phosphate@polydopamine microcapsule structure, including the following components: 0.5 g of triphenyl phosphate, 20 mL of absolute ethanol, 500 mL of deionized water, and 0.605 g of trishydroxymethylaminomethane , dopamine hydrochloride 0.5g;

[0028] Its preparation method comprises the following steps:

[0029] Weigh 0.5g of triphenyl phosphate and dissolve in 20mL of absolute ethanol, and disperse evenly by ultrasonication for 10 minutes;

[0030] Then, take another 1L large beaker and add 500mL of deionized water, then weigh 0.605g of tris to dissolve in deionized water, stir mechanically for 10 minutes to disperse evenly;

[0031] Then add the ethanol solution dropwise into deionized water (while dripping with mechanical stirring), after the dispersion is uniform, weigh 0.5g of dopamine hydrochloride and add it to the above mixed solution, and mechanically stir for 24 hours;

[0032] Finally, the m...

Embodiment 2

[0035] An electrolyte flame retardant additive material with a triphenyl phosphate@polydopamine microcapsule structure, including the following components: 0.5 g of triphenyl phosphate, 20 mL of absolute ethanol, 500 mL of deionized water, and 0.605 g of trishydroxymethylaminomethane , dopamine hydrochloride 0.5g;

[0036] Its preparation method comprises the following steps:

[0037] Weigh 0.5g of triphenyl phosphate and dissolve in 20mL of absolute ethanol, and disperse evenly by ultrasonication for 10 minutes;

[0038] Then, take another 1L large beaker and add 500mL of deionized water, then weigh 0.605g of tris to dissolve in deionized water, stir mechanically for 10 minutes to disperse evenly;

[0039] Then add the ethanol solution dropwise into deionized water (while dripping with mechanical stirring), after the dispersion is uniform, weigh 0.5g of dopamine hydrochloride and add it to the above mixed solution, and mechanically stir for 24 hours;

[0040] Finally, the m...

technical field

[0001] The invention relates to the technical field of flame-retardant materials for batteries, in particular to an electrolyte flame-retardant additive material with a triphenyl phosphate@polydopamine microcapsule structure and a synthesis method. Background technique

[0002] With the depletion of fossil energy, new energy vehicles have gradually become the mainstream of the times. Lithium-ion batteries have significant advantages such as high energy density, good cycle performance, and weak memory effect, and have become the first choice for energy and power of electric vehicles today.

[0003] However, while effectively providing power, lithium-ion batteries also face extreme conditions of electrical abuse, thermal abuse, and mechanical abuse. These working conditions are likely to cause a short circuit or a violent exothermic reaction of the lithium-ion battery, resulting in thermal runaway of the lithium-ion battery. Thermal runaway will inevitably br...

Examples

Embodiment 1

[0027] An electrolyte flame retardant additive material with a triphenyl phosphate@polydopamine microcapsule structure, including the following components: 0.5 g of triphenyl phosphate, 20 mL of absolute ethanol, 500 mL of deionized water, and 0.605 g of trishydroxymethylaminomethane , dopamine hydrochloride 0.5g;

[0028] Its preparation method comprises the following steps:

[0029] Weigh 0.5g of triphenyl phosphate and dissolve in 20mL of absolute ethanol, and disperse evenly by ultrasonication for 10 minutes;

[0030] Then, take another 1L large beaker and add 500mL of deionized water, then weigh 0.605g of tris to dissolve in deionized water, stir mechanically for 10 minutes to disperse evenly;

[0031] Then add the ethanol solution dropwise into deionized water (while dripping with mechanical stirring), after the dispersion is uniform, weigh 0.5g of dopamine hydrochloride and add it to the above mixed solution, and mechanically stir for 24 hours;

[0032] Finally, the m...

Embodiment 2

[0035] An electrolyte flame retardant additive material with a triphenyl phosphate@polydopamine microcapsule structure, including the following components: 0.5 g of triphenyl phosphate, 20 mL of absolute ethanol, 500 mL of deionized water, and 0.605 g of trishydroxymethylaminomethane , dopamine hydrochloride 0.5g;

[0036] Its preparation method comprises the following steps:

[0037] Weigh 0.5g of triphenyl phosphate and dissolve in 20mL of absolute ethanol, and disperse evenly by ultrasonication for 10 minutes;

[0038] Then, take another 1L large beaker and add 500mL of deionized water, then weigh 0.605g of tris to dissolve in deionized water, stir mechanically for 10 minutes to disperse evenly;

[0039] Then add the ethanol solution dropwise into deionized water (while dripping with mechanical stirring), after the dispersion is uniform, weigh 0.5g of dopamine hydrochloride and add it to the above mixed solution, and mechanically stir for 24 hours;

[0040] Finally, the m...

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