Zinc cathode electrolyte used for redox cells

An electrolyte and zinc negative electrode technology, applied in the field of electrochemical redox batteries, can solve the problems of reducing current efficiency and hindering the industrial development of batteries

Active Publication Date: 2013-09-25
周谨平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In acidic medium, the problem of dendrite and deformation of zinc anode is alleviated than in alkaline electrolyte, but still needs to be improved
In addition, hydrogen evolution reaction is easy to occur in acidic medium, thus generating self-discharge and reducing current efficiency
These technical problems hinder the industrial development of this type of battery

Method used

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  • Zinc cathode electrolyte used for redox cells
  • Zinc cathode electrolyte used for redox cells
  • Zinc cathode electrolyte used for redox cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0017] Explanation: In the examples described below, SA means methanesulfonic acid.

example 1

[0018] Example 1, the negative electrolyte does not contain the zinc cerium battery of additive.

[0019] (1) With 100ml of 0.8mol / L Ce 2 (CO 3 ) 3 And 100ml1.0mol / L Zn(SA) 2 .

[0020] - Weigh 61.5g methanesulfonic acid and Ce 2 (CO 3 ) 3 , formulated as 0.8mol / L Ce(SA) 3 +4.0mol / L SA catholyte.

[0021] - Weigh 8.14g ZnO and 38.40g methanesulfonic acid to prepare 1.0mol / L Zn(SA) 2 . The positive and negative chambers of the battery are separated by a cation exchange membrane. The positive and negative materials are graphite felt and carbon-plastic composite electrode respectively, and the reaction area between graphite felt and electrode is 4cm 2 . The catholyte is the 0.8mol / LCe(SA) prepared in ① 3 +4.0mol / LSA, the negative electrode solution is 1.0mol / LZn(SA) prepared in ② 2 . The charging and discharging current is 120mA, and the charging time is 30min. The maximum charge voltage of the battery is 3.18V, the maximum discharge voltage is 1.92V, the discharg...

example 2

[0022] Example 2, the negative electrolyte contains the zinc cerium battery of additive.

[0023] (1) positive electrode electrolyte and negative electrode electrolyte are the same as example 1.

[0024] (2) Add the following additives to 100ml negative electrode solution:

[0025] -weigh boric acid 2.0g, borax 1.5g;

[0026] -weigh 0.02g of indium hydroxide;

[0027] -Weigh lead oxide 0.02g;

[0028] - Take 0.5 g of cetyltrimethylammonium bromide.

[0029] - Stir and dissolve the added additives under heating conditions, and cool to room temperature.

[0030] (3) Battery assembly and experimental parameter setting According to the description in Example 1, charge and discharge tests were carried out. The maximum charge voltage of the battery is 2.96V, the maximum discharge voltage is 2.22V, the discharge time above 1V within one cycle can reach 27min, the discharge time above 0.2V can reach 27.5min, and the Coulombic efficiency is 91.7%. The results show that after addi...

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Abstract

The invention discloses a zinc cathode electrolyte used for redox cells. The electrolyte comprises divalent zinc ions as a main active component, and organic and inorganic additives. The additives comprise bromine-contained quaternary ammonium salts, boric acid borax, indium hydroxide and lead oxide. The additives are mainly used for pH adjustment, hydrogen suppression, and improvement of zinc depositing morphology. The zinc cathode electrolyte can be applied for zinc vanadium cells, zinc cerium cells, zinc iron cells and various redox cells taking zinc as the active component of the cathode.

Description

technical field [0001] The invention relates to the technical field of electrochemical redox batteries, in particular to a negative electrode electrolyte applied to redox batteries. The main component of the present invention is the acidic electrolyte of zinc ions, which contains bromine-containing quaternary ammonium salts, boric acid, borax, indium hydroxide, lead oxide and other additives. By adjusting the pH value, inhibiting hydrogen evolution, improving the morphology of zinc deposition, and improving Energy efficiency and cycle performance of batteries. This technology can be applied to zinc-vanadium batteries, zinc-cerium batteries, zinc-iron batteries and other redox batteries with zinc as the active material. Background technique [0002] In today's energy field, the development and utilization of renewable energy such as solar energy and wind energy has attracted more and more attention. In order to achieve the stability of power supply, it is necessary to develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/20
CPCY02E60/50
Inventor 周德璧周谨平
Owner 周谨平
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