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Application of regeneration electrode of zinc ion battery in electrochemical reduction of carbon dioxide

A zinc-ion battery, carbon dioxide technology, applied in the direction of electrodes, electrolytic organic production, electrolytic components, etc., can solve the problems of low conversion rate, limited efficient utilization, high energy consumption, etc., and achieve high selectivity effect

Active Publication Date: 2021-06-15
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the traditional catalytic hydrogenation, catalytic reforming and other reactions must be carried out under high temperature and high pressure conditions, and the disadvantages of low conversion rate and high energy consumption limit its efficient utilization.

Method used

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  • Application of regeneration electrode of zinc ion battery in electrochemical reduction of carbon dioxide
  • Application of regeneration electrode of zinc ion battery in electrochemical reduction of carbon dioxide
  • Application of regeneration electrode of zinc ion battery in electrochemical reduction of carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Carry out corrosion and regeneration treatment on the zinc sheet negative electrode by charging and discharging the nickel-zinc battery, specifically: the nickel electrode is a commercial sintered nickel electrode (nickel oxyhydroxide / nickel hydroxide), and the purity of the zinc negative electrode is 99.9%- 99.99% zinc flakes, zinc oxide or zinc oxalate saturated 6M potassium hydroxide as electrolyte. Finally, for the assembly of the battery ( figure 2 ), using the blue electric battery test system to conduct charge and discharge tests on nickel-zinc batteries.

[0054] (2) By adjusting the charge and discharge conditions: charge and discharge current density (10, 20, 30mA cm -2 ), charge and discharge cycles (1, 2, 3, 4, 5), charge time (10, 20, 30, 40, 50 minutes), discharge cut-off voltage (1.0, 1.2, 1.4, 1.6V) and constant Voltage charge and discharge, etc., to corrode and regenerate the zinc sheet negative electrode. By controlling the above experimental p...

Embodiment 2

[0075] (1) Carry out corrosion and regeneration treatment on the zinc sheet negative electrode by charging and discharging the nickel-zinc battery, specifically: the nickel electrode is a commercial sintered nickel electrode (nickel oxyhydroxide / nickel hydroxide), and the purity of the zinc negative electrode is 99.9%- 99.99% zinc flakes, 6M potassium hydroxide saturated with zinc oxide as electrolyte. Finally, for the assembly of the battery ( figure 2 ), using the blue electric battery test system to conduct charge and discharge tests on nickel-zinc batteries.

[0076] (2) The last step of the control is charging, the charge and discharge current density is 20mA cm -2 , the number of charge and discharge cycles is 1 cycle, the discharge time is 20 minutes, the charging time is 30 minutes, the temperature of the electric test room is 25 ° C, and the zinc sheet negative electrode is corroded and regenerated. Zinc@zinc oxide nanowires with a core-shell structure will be gene...

Embodiment 3

[0081] (1) Carry out corrosion and regeneration treatment to the zinc sheet negative electrode by charging and discharging the zinc-air battery, specifically: the air electrode is commercial activated carbon (sprayed on foamed nickel), and the zinc negative electrode has a purity of 99.9%-99.99% Zinc sheet, zinc oxide or zinc oxalate saturated 6M potassium hydroxide as electrolyte. Finally, for the assembly of the battery ( Figure 10 ), the battery shell is made of PMMA material, and the charge and discharge test of the zinc-air battery is carried out by using the blue electric battery test system. Figure 10 Schematic diagram of the zinc-air battery setup.

[0082] (2) By adjusting the charge and discharge conditions: charge and discharge current density (10, 20, 30mA cm -2 ), charge and discharge cycles (1, 2, 3, 4, 5), charge time (10, 20, 30, 40, 50 minutes), discharge cut-off voltage (1.0, 1.2, 1.4, 1.6V) and constant Voltage charge and discharge, etc., to corrode and...

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Abstract

The invention belongs to the field of electrocatalysts, and particularly relates to application of a regeneration electrode of an alkaline zinc ion battery in electrochemical reduction of carbon dioxide. A pure zinc sheet is used as a negative electrode of a nickel-zinc battery, and the chemical components and the structure of an electrode material are adjusted by using the charging and discharging states of an alkaline zinc ion battery. The two regenerated zinc electrodes can be used as cathode catalysts for electrochemical carbon dioxide reduction and have relatively high electrocatalytic activity and selectivity. The zinc@zinc oxide nanowires with core-shell structures have excellent carbon monoxide selectivity, and the layered two-dimensional zinc hydroxide nanosheets have preferential formic acid selectivity. The implementation of the invention can provide corresponding theoretical and technical support for designing and preparing a large-surface-area zinc electrode, is hopeful to solve the problem of waste batteries, and has important significance for promoting commercialization of electrocatalytic carbon dioxide reduction.

Description

technical field [0001] The invention belongs to the field of electrocatalysts, and more specifically relates to the application of a regenerated electrode of an alkaline zinc ion battery in the electrochemical reduction of carbon dioxide. Background technique [0002] Since the Industrial Revolution, with the increasingly large-scale application of fossil energy (coal, oil, and natural gas), human beings have also emitted more and more greenhouse gases, mainly carbon dioxide, into the atmosphere, causing global average temperature warming. Direct results and collateral consequences of melting Antarctic glaciers, rising sea levels, and mass extinctions. In response to this situation, leaders of nearly 200 countries and regions around the world reached an unprecedented consensus at the Paris Climate Conference at the end of 2015. To keep the increase in global average temperature within 2°C (relative to the pre-industrial era), to achieve this goal, the concentration of carbo...

Claims

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Application Information

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IPC IPC(8): C25B1/23C25B3/26C25B3/07C25B11/091
CPCC25B1/00C25B3/00
Inventor 夏宝玉陈圣华郭兴蓬
Owner HUAZHONG UNIV OF SCI & TECH
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