Method for inhibiting growth of zinc dendrites in zinc ion battery

A zinc-ion battery and zinc dendrite technology, applied in the field of material chemistry, can solve the problems of discontinuous solid-solid interface, severe zinc dendrite growth, etc., and achieve the effects of enhancing water-locking ability, cheap and degradable raw materials, and uniform deposition

Pending Publication Date: 2022-04-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of discontinuous solid-solid interface in quasi-solid-state zinc-ion ba...

Method used

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  • Method for inhibiting growth of zinc dendrites in zinc ion battery
  • Method for inhibiting growth of zinc dendrites in zinc ion battery
  • Method for inhibiting growth of zinc dendrites in zinc ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Dissolve 0.4g of guar gum into 10mL of 1.5M zinc trifluoromethanesulfonate solution.

[0027] 2) After the above solution is completely dissolved, add 0.1 ml of glycerin and magnetically stir for 30 min.

[0028] 3) Slowly add 1ml of neutral organic boron cross-linking agent dropwise to the above mixed solution, and stir with a glass rod to obtain a self-repairing and self-adaptive quasi-solid electrolyte.

[0029] 4) A quasi-solid-state Zn-ion battery without dendrite growth is assembled by assembling a Zn anode, a Mn oxide cathode, and a gel electrolyte.

[0030] The guar gum electrolyte obtained with the present embodiment is a porous network structure ( figure 1 ), the FTIR spectrum shows that a dynamic B-O bond ( figure 2 ), and the gel electrolyte has excellent water retention properties ( image 3 ) and ultra-fast self-healing performance ( Figure 4 and Figure 5 ). From image 3 It can be seen that the pure guar gum hydrogel has the lowest water-hold...

Embodiment 2

[0032] 1) Dissolve 0.4g of guar gum into 10mL of 1.5M zinc trifluoromethanesulfonate solution.

[0033] 2) After the above solution is completely dissolved, add 0.2ml of glycerin and stir for 30min with magnetic force.

[0034] 3) Slowly add 1ml of neutral organic boron cross-linking agent dropwise to the above mixed solution, and stir with a glass rod to obtain a self-repairing and self-adaptive quasi-solid electrolyte.

[0035] 4) A dendrite-free quasi-solid-state Zn-ion battery was assembled by zinc anode, polyaniline cathode, and gel electrolyte.

[0036] The materials prepared above were subjected to SEM, FTIR, water retention performance test analysis and electrochemical performance test. Water retention remained stable over the 8-day test period. Electrochemical performance tests showed uniform zinc deposition, inhibited growth of zinc dendrites, and prolonged the service life of zinc electrodes.

Embodiment 3

[0038] 1) Dissolve 0.4g of guar gum into 10mL of 1.5M zinc trifluoromethanesulfonate solution.

[0039] 2) After the above solution is completely dissolved, add 0.1 ml of glycerin and magnetically stir for 30 min.

[0040] 3) Slowly add 2ml of neutral organic boron cross-linking agent dropwise into the above mixed solution, and stir with a glass rod to obtain a self-repairing and self-adaptive quasi-solid electrolyte.

[0041] 4) A dendrite-free quasi-solid-state Zn-ion battery was assembled by zinc anode, polypyrrole cathode and gel electrolyte.

[0042] The materials prepared above were subjected to SEM, FTIR, water retention performance test analysis and electrochemical performance test. Water retention remained stable over the 8-day test period. Electrochemical performance tests showed uniform zinc deposition, inhibited growth of zinc dendrites, and prolonged the service life of zinc electrodes.

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Abstract

The invention relates to a method for inhibiting dendritic crystal growth in a zinc battery by preparing an electrolyte with ultrafast self-repairing performance to construct an electrolyte/zinc negative electrode dynamic self-adaptive interface. According to the invention, a certain amount of guar gum is completely dissolved in a zinc salt solution to form a uniform colloid. Subsequently, glycerol is added to the prepared colloid to form a binary solvent system. And finally, adding a neutral organic boron cross-linking agent and curing the neutral organic boron cross-linking agent to obtain the gel with ultrafast self-repairing performance. When the gel is applied to an electrolyte in a quasi-solid-state battery, a dynamic and continuous electrolyte/zinc negative electrode interface can be constructed, dendritic crystal growth is inhibited, and the service life of a zinc battery is greatly prolonged. The method is low in price, simple in process, safe and environment-friendly, and has the potential of large-scale application.

Description

technical field [0001] The invention belongs to the technical field of material chemistry, and in particular relates to a method for inhibiting the growth of zinc dendrites in a zinc ion battery. Background technique [0002] The rapid development of today's society has stimulated the demand for flexible and wearable devices, mainly including portable electronics and smart wearable systems. In the past few years, efforts have been made to fabricate high-performance flexible Li-ion batteries. However, despite the high energy and power density offered by Li-ion batteries, safety concerns and the limitation of Li metal resources make their practical applications face huge obstacles. In fact, safety and non-toxicity are crucial prerequisites for wearable energy storage devices. In this context, an alternative strategy, Zn-ion batteries, has attracted great attention due to their intrinsic safety, ease of fabrication, and low cost. However, aqueous zinc-ion batteries have been...

Claims

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Application Information

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IPC IPC(8): H01M10/38H01M10/42
CPCH01M10/38H01M10/4235H01M2220/30Y02P70/50Y02E60/10
Inventor 徐林刘琴麦立强
Owner WUHAN UNIV OF TECH
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