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Aqueous zinc metal battery MXene-based diaphragm as well as preparation method and application thereof

A zinc metal and zinc battery technology, which is applied to battery pack components, circuits, electrical components, etc., can solve problems such as poor cycle stability and dendrite growth, achieve dendrite growth inhibition, easy operation, and accelerated migration and transmission Effect

Pending Publication Date: 2021-12-28
山东大学深圳研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of dendrite growth and long-term use cycle stability of existing aqueous zinc batteries, the present invention proposes an MXene-based separator for aqueous zinc metal batteries and its preparation method and application

Method used

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  • Aqueous zinc metal battery MXene-based diaphragm as well as preparation method and application thereof
  • Aqueous zinc metal battery MXene-based diaphragm as well as preparation method and application thereof
  • Aqueous zinc metal battery MXene-based diaphragm as well as preparation method and application thereof

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preparation example Construction

[0036] The second aspect of the present invention provides a method for preparing an MXene-based diaphragm for a water-based zinc metal battery, comprising: soaking the diaphragm into a concentrated solution of an MXene colloidal solution.

[0037] In one or more embodiments of the present invention, the preparation step of the MXene colloidal solution includes: dissolving the powder of the MAX phase in a mixed solution of hydrochloric acid and fluoride, peeling off the MXene, and separating the obtained few-layer or multi-layer MXene Colloidal solution;

[0038]More specifically, the preparation step of the MXene colloidal solution is usually to stir the powder of the MAX phase in a mixed solution of hydrochloric acid and fluoride, then add water and centrifugally wash to remove excess acid and fluoride, and then peel off the multilayer MXene by Ultrasonic stripping or adding a layering reagent and centrifuging to separate the obtained few-layer or multi-layer MXene colloidal...

Embodiment 1

[0051] A highly stable MXene-based diaphragm, the preparation process includes the following steps:

[0052] (1) Preparation of MXene colloidal solution: Ti 3 AlC 2 The MAX phase was etched with hydrochloric acid and lithium fluoride to remove aluminum, washed to remove acid and other impurities, then added deionized water to disperse, shaken by hand, and centrifuged to obtain Ti 3 C 2 T x MXene colloidal solution;

[0053] (2) Preparation of MXene colloidal solution concentrate: the above-mentioned Ti 3 C 2 T x The MXene colloidal solution was centrifuged in a high-speed centrifuge at a speed of 9000r / min for 5 minutes, half of the clearer liquid in the upper part was removed, and the remaining liquid and the bottom sediment were shaken evenly to obtain a concentrated MXene colloidal solution.

[0054] (3) Soak the Whatman glass fiber diaphragm in the above-mentioned concentrated MXene colloidal solution for 1 min, take out the sample, and dry it in a vacuum oven to o...

Embodiment 2

[0057] A highly stable MXene-based diaphragm, the preparation process includes the following steps:

[0058] (1) Preparation of MXene colloidal solution: Ti 3 AlC 2 The MAX phase was etched with hydrochloric acid and lithium fluoride to remove aluminum, washed to remove acid and other impurities, then added deionized water to disperse, shaken by hand, and centrifuged to obtain Ti 3 C 2 T x MXene colloidal solution;

[0059] (2) Preparation of MXene colloidal solution concentrate: the above-mentioned Ti 3 C 2 T x The MXene colloidal solution was centrifuged in a high-speed centrifuge at a speed of 9000r / min for 5 minutes, half of the clearer liquid in the upper part was removed, and the remaining liquid and the bottom sediment were shaken evenly to obtain a concentrated MXene colloidal solution.

[0060] (3) Put the concentrated MXene colloid solution in the spray gun, spray it on the surface of the Whatman glass fiber diaphragm, and then dry the sample in a vacuum ove...

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Abstract

The invention relates to the field of advanced inorganic non-metallic materials, in particular to a battery diaphragm, and more particularly relates to an aqueous zinc metal battery MXene-based diaphragm as well as a preparation method and application thereof. The invention provides the aqueous zinc metal battery MXene-based diaphragm as well as the preparation method and application thereof in order to solve the problems of dendritic crystal growth and poor cycle stability in long-term use of an existing aqueous zinc battery. Research finds that relatively good cycling stability cannot be realized by simply improving electrolyte components, so that the MXene colloidal solution is modified on the diaphragm, the nucleation barrier is effectively reduced, the zinc deposition is uniform, the volume change is buffered and the ion transmission is accelerated in the battery system.

Description

technical field [0001] The invention relates to the field of advanced inorganic non-metallic materials, in particular to a battery diaphragm, and more specifically to an MXene-based diaphragm for an aqueous zinc metal battery and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Based on the current increasing demand for energy storage, it is crucial to develop secondary rechargeable batteries with high safety, high energy density, and long life. The volume theoretical specific capacity of metal zinc is as high as 5580mAh cm -3 , metal zinc has good ductility and low price, and can work stably in aqueous electrolyte, and the electrol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/403H01M50/431H01M50/46
CPCH01M50/403H01M50/431H01M50/46Y02E60/10
Inventor 冯金奎田园安永灵
Owner 山东大学深圳研究院
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