Mixed gel polymer electrolyte and preparation method thereof, and all-solid-state zinc ion battery

A technology of mixing gel and electrolyte, applied in the direction of electrolyte immobilization/gelation, electrolyte, secondary battery, etc., can solve the problems of high and low temperature resistance, hydrogen gas flatulence, dendrite problem and other active substances

Inactive Publication Date: 2021-04-06
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the actual use of liquid aqueous electrolytes still brings certain problems, such as leakage, water evaporation and cycle perf...

Method used

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  • Mixed gel polymer electrolyte and preparation method thereof, and all-solid-state zinc ion battery
  • Mixed gel polymer electrolyte and preparation method thereof, and all-solid-state zinc ion battery
  • Mixed gel polymer electrolyte and preparation method thereof, and all-solid-state zinc ion battery

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preparation example Construction

[0049] The present invention also provides a method for preparing a mixed gel polymer electrolyte, comprising the following steps:

[0050] Sodium alginate and guar gum are mixed with an aqueous electrolyte solution, and after the gel is stabilized, a mixed gel polymer electrolyte is obtained.

[0051] In the present invention, the electrolyte is preferably first dissolved in deionized water to obtain a certain concentration of electrolyte aqueous solution;

[0052] Then mix sodium alginate and guar gum with the electrolyte aqueous solution evenly, repeat stirring, and let it stand at room temperature for a period of time until the sodium alginate and guar gum polymer are solidified and stable, and the mixed coagulation can be obtained. gel polymer electrolyte.

[0053] In the present invention, zinc salt and / or manganese salt are preferably included in the aqueous electrolyte solution, and the concentration of zinc salt is preferably 1-3 mol / L, such as 1 mol / L, 1.5 mol / L, 2 ...

Embodiment 1

[0061] Example 1 Sodium Alginate Guar Gum (SAGG) Mixed Gel Polymer Electrolyte

[0062] Step 1. Configure 2MZnSO 4 and 0.1MMnSO 4 The mixed electrolyte aqueous solution;

[0063] Step 2: Take 10 mL of the above-mentioned mixed electrolyte aqueous solution, 0.4 g of sodium alginate and 0.2 g of guar gum and mix them uniformly with each other, and stir thoroughly to obtain a mixed gel.

[0064] Step 3, take the above-mentioned gel, let it stand in a petri dish at room temperature, after a certain period of time, the mixed polymer of sodium alginate and guar gum solidifies, and obtains sodium alginate guar gum (SAGG) mixed gel polymerization matter electrolyte.

[0065] see figure 1 , figure 1 The preparation method flowchart of sodium alginate guar gum (SAGG) mixed gel polymer electrolyte provided for the embodiment of the present invention;

[0066] figure 2 The physical photograph of the sodium alginate guar gum (SAGG) mixed gel polymer electrolyte prepared for Example...

Embodiment 2

[0068] Example 2 Sodium Alginate Guar Gum (SAGG) Mixed Gel Polymer Electrolyte Used in All-Solid Zinc-ion Batteries

[0069] Step 1. Configure 2MZnSO 4 and 0.1MMnSO 4 The mixed electrolyte aqueous solution;

[0070] Step 2: Take 10 mL of the above-mentioned mixed electrolyte aqueous solution, 0.4 g of sodium alginate and 0.2 g of guar gum and mix them uniformly with each other, and stir thoroughly to obtain a mixed gel.

[0071] Step 3, take the above-mentioned gel, let it stand in a petri dish at room temperature, after a certain period of time, the mixed polymer of sodium alginate and guar gum solidifies, and obtains sodium alginate guar gum (SAGG) mixed gel polymerization matter electrolyte.

[0072] Step 4, put the sodium alginate guar gum (SAGG) mixed gel polymer electrolyte obtained above into the zinc ion battery system in the order of positive pole, polymer electrolyte and negative pole, Figure 4 The structural representation of the all-solid-state zinc-ion batter...

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Abstract

The invention provides a mixed gel polymer electrolyte. The mixed gel polymer electrolyte comprises mixed gel and an electrolyte doped into the mixed gel, wherein the mixed gel comprises sodium alginate and guar gum; and the electrolyte comprises a zinc salt. The sodium alginate-guar gum (SAGG) mixed gel polymer electrolyte has high ionic conductivity (10-50 mS/cm), is beneficial to improving the overall cycle and rate capability of a battery, has certain mechanical strength, can meet the design requirements of flexible devices, and has good application and development prospects when used as a flexible energy storage device of flexible wearable secondary electronic equipment. Meanwhile, the SAGG mixed gel polymer electrolyte can inhibit the growth of negative electrode zinc dendrites and prolong the service life of the battery. The invention also provides a preparation method of the mixed gel polymer electrolyte and an all-solid-state zinc ion battery.

Description

technical field [0001] The invention belongs to the technical field of secondary batteries, and in particular relates to a mixed gel polymer electrolyte, a preparation method thereof and an all-solid zinc ion battery. Background technique [0002] With the widespread popularization of rechargeable mobile devices and the development of new energy vehicle technology, the demand for sustainable new energy technology is increasing. As a representative of new energy technology, secondary batteries have developed rapidly in related scientific research. In particular, in recent years, people's demand for flexible and wearable secondary electronic devices has also been increasing, and flexible energy storage devices, as an important part of flexible and wearable secondary electronic devices, have also attracted much attention. Among these secondary batteries, zinc-ion batteries (such as zinc-manganese batteries and zinc-vanadium batteries) are a new type of secondary water-based bat...

Claims

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Application Information

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IPC IPC(8): H01M10/36H01M10/38
CPCH01M10/36H01M10/38H01M2300/0085H01M2300/0091Y02E60/10Y02P70/50
Inventor 周航黄媛王佳伟
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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