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Preparation method of biopolymer electrolyte with water as solvent

A biopolymer and electrolyte technology, applied in the field of biopolymer electrolyte preparation, can solve the problems of excessive pore size and low solid-state conductivity.

Active Publication Date: 2019-07-12
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

[0006] The invention solves the safety problems of traditional liquid polymer electrolytes, as well as the problems of low solid-state conductivity and excessive pore size. The invention uses cellulose acetate and hydroxyethyl cellulose as matrix materials, deionized water as solvent, and deep eutectic The solvent is used as an additive to prepare a gel polymer electrolyte with high safety and high conductivity

Method used

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  • Preparation method of biopolymer electrolyte with water as solvent
  • Preparation method of biopolymer electrolyte with water as solvent
  • Preparation method of biopolymer electrolyte with water as solvent

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specific Embodiment approach 1

[0016] Embodiment 1, a method for preparing a biopolymer electrolyte using water as a solvent, is characterized in that it is carried out according to the following steps:

[0017] Step 1: Put 0.5g of cellulose acetate and 0.1g of hydroxyethylcellulose in a beaker, add 30ml of deionized water, and stir for 12 hours.

[0018] Step 2: Dissolve 0.6g of urea, 0.4g of choline chloride and 0.2g of glycerin in a weighing bottle, and heat in a water bath to dissolve until colorless and transparent.

[0019] Step 3: Add the deep eutectic solvent obtained in step 2 to the mixed solution obtained in step 1, stir for 6 hours, add lithium salt and continue stirring for 6 hours, place it in a petri dish at room temperature to let the air bubbles out, and wait for the air bubbles to be removed Then put it into a vacuum oven and dry it for 15 hours to prepare a film.

[0020] This embodiment is carried out in a closed beaker and a weighing bottle, which effectively avoids the volatilization ...

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Abstract

The invention relates to the field of lithium ion battery gel polymer electrolytes, in particular to a preparation method of a biopolymer electrolyte with water as a solvent. The preparation method sequentially comprises the following steps of: 1) mixing and stirring cellulose acetate, hydroxyethyl cellulose and deionized water according to a certain proportion for 12 hours to obtain a mixed solution; 2) performing water-bath heating of urea, choline chloride and glycerol according to a certain mess ratio and dissolving the mixture to a colorless and transparent state to obtain a deep eutecticsolvent; 3) adding the deep eutectic solvent into the mixed solution for blending for 6h, adding a lithium salt for continuous stirring for 6h, pouring the mixed solution in a culture dish for standing and bubble removal at a room temperature, and drying the mixed solution in a vacuum drying oven at a temperature of 100 DEG C to prepare a thin film. The film prepared by the method is good in surface shape, simple in synthetic process and convenient to operate, and has high conductivity.

Description

technical field [0001] The invention relates to the field of lithium ion battery gel polymer electrolyte, in particular to a preparation method of a biopolymer electrolyte using water as a solvent. Background technique [0002] Lithium-ion batteries have significant advantages such as small size, light weight, long life and high capacity density. During its development, safety issues such as explosion and combustion caused by liquid electrolyte leakage and oxidation have attracted extensive attention from researchers. Gel polymer electrolyte is a new type of polymer electrolyte material with high safety and no leakage. , is an advanced measure to solve battery safety and environmental protection issues. [0003] In recent years, lithium-ion batteries have been widely used as portable mobile power sources. The electrolyte in the battery is a key part of the lithium-ion battery. Ion conductivity is an important parameter of polymer electrolytes. Ion conductivity represents th...

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Application Information

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IPC IPC(8): H01M10/0565
CPCH01M10/0565H01M2300/0065Y02E60/10
Inventor 李丽波单宇航杜金田翟墨
Owner HARBIN UNIV OF SCI & TECH
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