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Electrolyte capable of suppressing zinc dendritic crystal growth in charging-discharging process of Zn-PANI secondary battery

A charging and discharging process, secondary battery technology, applied in secondary batteries, acidic electrolytes, aqueous electrolytes, etc., can solve problems such as short cycle life

Inactive Publication Date: 2017-10-10
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the important problem that the existing acidic Zn-PANI secondary battery has a short cycle life due to the formation of zinc dendrites, and proposes a method that can effectively suppress the acidic Zn-PANI secondary battery during charging and discharging. Electrolyte for zinc dendrite growth

Method used

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  • Electrolyte capable of suppressing zinc dendritic crystal growth in charging-discharging process of Zn-PANI secondary battery
  • Electrolyte capable of suppressing zinc dendritic crystal growth in charging-discharging process of Zn-PANI secondary battery
  • Electrolyte capable of suppressing zinc dendritic crystal growth in charging-discharging process of Zn-PANI secondary battery

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Embodiment Construction

[0023] One, the preparation of zinc sheet:

[0024] Zinc flakes are 99.99% pure and cut to 1×10 cm 2 The long strips are polished with metallographic sandpaper to remove surface oxides, then washed with secondary water and dried.

[0025] Second, the preparation of battery electrolyte:

[0026] A certain amount of ZnCl 2 and NH 4 Dissolve Cl in twice distilled water, then add one or more of dicarboxylic acid, dicarboxylic acid salt, tricarboxylic acid salt and one or more of surfactant, and then add gas phase SiO 2 , after adjusting the pH value of the mixed solution to 3.0-6.0 with hydrochloric acid or sodium hydroxide, fully stir for 5-12 h.

[0027] The following table is the composition range of the prepared electrolyte:

[0028]

[0029] The above dicarboxylic acid may be at least any one of oxalic acid, malonic acid, succinic acid, adipic acid, maleic acid, phthalic acid or phthalic acid.

[0030] Dibasic carboxylates can be sodium oxalate, sodium malonate, sod...

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Abstract

The invention discloses an electrolyte capable of suppressing zinc dendritic crystal growth in a charging-discharging process of a Zn-PANI secondary battery, and relates to the production technical field of the Zn-PANI secondary battery. The electrolyte comprises 0.1-1.0M of ZnCl<2>, 0.1-2.0M of NH<4>Cl, 0.01-1M of dicarboxylic acid, 0.005-1M of dicarboxylate, 0.1-2.0M of tricarboxylate, and gaseous phase SiO<2> with mass percentage of 3-12% and a surfactant, wherein the pH value of the electrolyte is 3.0-6.0. The Zn-PANI secondary battery is assembled by the electrolyte and a zinc sheet, a membrane and polyaniline loaded on a carbon current collector. A result obtained after the secondary battery is charged and discharged proves that the zinc sheet is smooth and tidy in surface, and a compact protective film can be formed possibly, so that zinc dendritic crystal formation can be suppressed effectively.

Description

technical field [0001] The invention relates to the technical field of Zn-PANI secondary battery production, especially the technology of its electrolyte. technical background [0002] With the increasing demand for energy and the continuous improvement of social and economic sustainable development, green energy with high performance and low cost has attracted more and more attention. The abundance of metal zinc reserves in the earth's crust accounts for about 1.5%, and it is cheap and non-toxic. Because zinc has a relatively low electrode potential (-0.763V vs SHE), it is often used as a battery anode material. Using zinc as the anode of the secondary battery can avoid environmental pollution to a certain extent, and utilize natural resources effectively and rationally. [0003] Zn-PANI secondary batteries have been reported and have made major breakthroughs. However, an important problem encountered in the development of polyaniline secondary batteries today is the for...

Claims

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Application Information

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IPC IPC(8): H01M10/36
CPCH01M10/36H01M2300/0005Y02E60/10
Inventor 阚锦晴胡转黄倩
Owner YANGZHOU UNIV
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