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An acid-base asymmetric electrolyte zinc-quinone battery

A catholyte and anolyte technology, applied in battery electrodes, fuel cell-type half-cells and secondary battery-type half-cells, circuits, etc., can solve problems such as damage to battery performance, and achieve strong stability and efficiency. High and easy industrial production effect

Active Publication Date: 2021-07-20
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electrolyte mismatch between zinc anode and quinone cathode will impair battery performance

Method used

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  • An acid-base asymmetric electrolyte zinc-quinone battery
  • An acid-base asymmetric electrolyte zinc-quinone battery
  • An acid-base asymmetric electrolyte zinc-quinone battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Includes anode, cathode, anolyte, catholyte, and diaphragm.

[0061] Anode: use 1×1cm 2 zinc plate.

[0062] Cathode: Disperse 5mg of ultra-thin carbon nanosheet-loaded hollow nickel trisulfide composite in 500uL of water / ethanol / Nafion mixed solution (volume ratio water / ethanol / Nafion=5:5:1), ultrasonic for half an hour Get the slurry, use a pipette gun to take 100uL of the slurry and apply it on an area of ​​4×4cm 2 On carbon paper, the coated area is 1×1cm 2 , the loading amount of the ultrathin carbon nanosheet-loaded hollow nickel disulfide composite material is 1.0 mg, and a cathode electrode is obtained. The cathode air-diffusion electrode was baked and dried under an infrared lamp before being used for battery assembly.

[0063] Diaphragm: Bipolar membrane is used.

[0064] The anolyte in the anode chamber is separated from the catholyte in the cathode chamber by a bipolar membrane to prevent the catholyte and anolyte from mixing and neutralizing reaction. ...

Embodiment 2

[0069] Includes anode, cathode, anolyte, catholyte, and diaphragm.

[0070] Anode: use 1×1cm 2 zinc plate.

[0071] Cathode: Disperse 5mg of ultra-thin carbon nanosheet-loaded hollow nickel trisulfide composite in 500uL of water / ethanol / Nafion mixed solution (volume ratio water / ethanol / Nafion=5:5:1), ultrasonic for half an hour Get the slurry, use a pipette gun to take 100uL of the slurry and apply it on an area of ​​4×4cm 2 On carbon paper, the coated area is 1×1cm 2 , the loading amount of the ultrathin carbon nanosheet-loaded hollow nickel disulfide composite material is 1.0 mg, and a cathode electrode is obtained. The cathode air-diffusion electrode was baked and dried under an infrared lamp before being used for battery assembly.

[0072] Diaphragm: Bipolar membrane is used.

[0073] The anolyte in the anode chamber is separated from the catholyte in the cathode chamber by a bipolar membrane to prevent the catholyte and anolyte from mixing and neutralizing reaction. ...

Embodiment 3

[0077] Embodiment 3 electrochemical performance measurement

[0078] Respectively for zinc-quinone battery 1 # ~2 # Perform electrochemical tests to obtain discharge polarization curves, power densities and stability results for each battery.

[0079] of which battery 1 # ,2 # The open circuit voltage results as image 3 shown by image 3 It can be seen that the battery 1 # The open circuit voltage is 1.95V, and the battery 2 # The open circuit voltage of the zinc-quinone battery is only 1.2V, indicating that the asymmetric electrolyte design helps to improve the open circuit voltage of the zinc-quinone battery.

[0080] battery 1 # ,2 # The polarization curve and power density test results are as follows Figure 4 shown by Figure 4 It can be seen that the battery 1 # The power density can reach 315mW cm -2 , much higher than the battery 1 # The power density shows that the asymmetric electrolyte design can improve the power density of zinc-quinone batteries.

...

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Abstract

The application discloses a zinc-quinone battery, comprising an anode, a cathode, a diaphragm, an anolyte, and a catholyte; wherein, the cathode contains a cathode catalyst, and the cathode catalyst is selected from at least one of the quinone reversible reduction oxidation reaction catalysts One: the anode is metal zinc; the anolyte is an alkaline solution, and the catholyte is an acidic solution containing quinone; the anolyte and the catholyte are separated by the diaphragm. The Zn-quinone cell has an open circuit voltage of 1.95 V and a maximum power density of 315 mW cm ‑2 , at 10mA cm ‑2 The current density charge and discharge voltage difference is 200mV, which solves the problems of poor reversibility and poor stability of the traditional zinc-quinone battery, improves the open circuit voltage and power density of the battery, and improves the performance of energy storage and conversion equipment. It has great potential and good application prospects.

Description

technical field [0001] The application relates to a zinc-quinone battery, which belongs to the field of rechargeable and dischargeable batteries. Background technique [0002] The energy crisis and environmental pollution problems caused by excessive consumption of fossil energy have greatly promoted the development of new environmentally friendly renewable energy including wind energy, tidal energy and solar energy. Recently, Zn-based batteries, especially Zn-ion batteries, Zn-flow batteries and Zn-air batteries have greatly attracted the research interests of scientific researchers. Because of its low price, safety, high efficiency, and environmental friendliness, zinc-air batteries are extremely competitive in the future development of new energy sources. However, there are still some problems to be solved in Zn-air batteries. The first thing to bear is the slow kinetics of the battery cathode and the relatively poor reversibility of the battery. When the battery is di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/90H01M12/08
CPCH01M4/8647H01M4/9083H01M12/08
Inventor 蔡平伟温珍海
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI