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Aqueous zinc ion battery electrolyte membrane and preparation and application method thereof

A zinc-ion battery, electrolyte membrane technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of battery short circuit, weak physical strength, fire, etc., and achieve the effect of reducing interface impedance, rich sources, and conducive to uniform distribution

Active Publication Date: 2019-08-02
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, if natural rubber materials such as sodium alginate are used alone to prepare the electrolyte membrane of lithium-ion batteries, the weak physical strength will often cause the battery to short-circuit, causing safety accidents such as fire.

Method used

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  • Aqueous zinc ion battery electrolyte membrane and preparation and application method thereof
  • Aqueous zinc ion battery electrolyte membrane and preparation and application method thereof
  • Aqueous zinc ion battery electrolyte membrane and preparation and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Prepare a sodium alginate aqueous solution with a mass concentration of 3%, and apply the solution evenly on the surface of the zinc negative electrode with a thickness of 100 μm. The preparation method is similar to that of Comparative Example 1, and the ZnSO 4 The aqueous solution was adjusted to 2mol / L, and dilute sulfuric acid was added dropwise to adjust the pH to 4.3 for zinc-sodium ion exchange reaction. The aging time was 3 hours. After crosslinking, a gel electrolyte membrane with a thickness of 90 μm was obtained, and the material was characterized. Then adopt the gel electrolyte membrane prepared in this embodiment, and conventional zinc ion positive electrode MnO 2 Matching Fabrication of Gel Zinc-ion Batteries, MnO 2 The pole pieces were immersed in 0.1mol / L MnSO in advance 4 In order to inhibit the dissolution of the positive electrode material in the battery cycle process, assemble the CR2016 button battery according to the conventional method, without u...

Embodiment 2

[0045] To prepare a sericin-zinc alginate composite electrolyte membrane, the sericin accounting for 10% of the mass fraction of sodium alginate was mixed uniformly with sodium alginate powder in advance, and then an aqueous solution with a mass fraction of the mixed material of 3% was prepared according to the preparation of Example 1 method, the solution is coated on the zinc negative electrode, using 2mol / L ZnSO 4 Add dilute sulfuric acid dropwise to the aqueous solution to adjust the pH to 4.3 for zinc-sodium ion exchange reaction. The aging time is 3 hours. After cross-linking, a gel electrolyte membrane with a thickness of 90 μm is obtained, and the material is characterized. Then adopt the gel electrolyte membrane prepared in this embodiment, and conventional zinc ion positive electrode MnO 2 Matching Fabrication of Gel Zinc-ion Batteries, MnO 2 The pole pieces were immersed in 0.1mol / L MnSO in advance 4 In order to inhibit the dissolution of the positive electrode ma...

Embodiment 3

[0048] To prepare a pectin-zinc alginate composite electrolyte membrane, pre-mix pectin accounting for 5% of the mass fraction of sodium alginate with sodium alginate powder, and then configure an aqueous solution with a mass fraction of the mixed material of 4%, according to the preparation of Example 1 method, the solution is coated on the zinc negative electrode, using 2mol / L ZnSO 4 The aqueous solution was added dropwise with dilute sulfuric acid to adjust the pH to 4.3 for zinc-sodium ion exchange reaction. The aging time was 3 hours. After cross-linking, a gel electrolyte membrane with a thickness of 90 μm was obtained, and the material was characterized. Then adopt the gel electrolyte membrane prepared in this embodiment, and conventional zinc ion positive electrode MnO 2 Matching Fabrication of Gel Zinc-ion Batteries, MnO 2 The pole piece is immersed in 0.1mol / L MnSO in advance 4 In order to inhibit the dissolution of the positive electrode material in the battery cy...

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Abstract

The invention discloses an aqueous zinc ion battery composite electrolyte membrane and a preparation and application method thereof. The prepared zinc alginate-based polymer composite gel electrolytemembrane has a homogeneous three-dimensional layered cross-linking network structure and high ion conductivity. According to the preparation method, the polysaccharide sodium alginate-based material and the zinc ion are utilized, and the zinc ion cross-linking electrolyte membrane is formed in a weak acid or neutral medium through stacking after the sodium-zinc ion exchange reaction. The electrolyte membrane prepared by the method has both excellent physical and electrochemical properties, the problems of negative electrode zinc dendrites and zinc corrosion can be effectively suppressed, and the method is simple and fast, low in cost, environmentally friendly and controllable in condition and is particularly suitable for low-cost large-scale energy storage zinc ion battery systems and alsosuitable for preparing flexible aqueous system zinc ion batteries in flexible devices.

Description

technical field [0001] The invention relates to the technical field of preparation of electrolyte membranes for aqueous zinc-ion batteries, in particular to a gel electrolyte membrane, a preparation method thereof, and an application thereof in the field of aqueous zinc-ion batteries. Background technique [0002] A flexible battery is a type of energy storage device with special mechanical properties, which can be bent, twisted or folded to a certain extent, and can be a primary battery or a secondary battery. In recent years, with the development of modern technology, its applications in smart electronic devices, wearable devices, medical devices, micro sensors, trackers, and communications have developed rapidly. However, some special fields, such as biomedicine, implanted energy storage, etc., require batteries not only to supply high energy density and high capacity, but also put forward higher requirements for the safety of the battery itself and during use. Therefore ...

Claims

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Application Information

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IPC IPC(8): H01M10/36
CPCH01M10/36Y02E60/10
Inventor 周江梁叔全刘存鑫解雪松高嘉蔚邓灿彬
Owner CENT SOUTH UNIV
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