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Aqueous rechargeable magnesium/zinc ion capacitor battery

A capacitive battery and zinc ion technology, applied in the field of electrochemistry, can solve problems such as mismatch between energy peak output and energy needs, low energy storage density of supercapacitors, and potential safety hazards, etc., to achieve long cycle life, high energy density, The effect of improving safety performance

Active Publication Date: 2013-11-20
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, renewable and clean energy such as solar energy and wind energy have become research hotspots in various countries, but the peak output of these energy sources often cannot match the energy demand, so an efficient, stable and reliable energy conversion and storage device has become our Top concerns
People have developed various forms of energy storage devices, among which lithium-ion batteries have rapidly occupied the market of energy storage devices due to their advantages of high specific energy since their commercialization, and are widely used in cameras, mobile phones, notebook computers and other devices. It has been widely used, but the flammable organic electrolyte used has potential safety hazards during overcharge and overdischarge, which inhibits the application of lithium-ion batteries in large-scale energy storage devices; at the same time, lithium-ion batteries are also subject to rapid charge-discharge and cycle Performance times are limited; compared with traditional capacitors and batteries, supercapacitors have the characteristics of high specific power, fast charging and discharging, long cycle life, and wide temperature range, but the energy storage density of supercapacitors is low, far inferior to Battery

Method used

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  • Aqueous rechargeable magnesium/zinc ion capacitor battery
  • Aqueous rechargeable magnesium/zinc ion capacitor battery
  • Aqueous rechargeable magnesium/zinc ion capacitor battery

Examples

Experimental program
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preparation example Construction

[0026] Preparation of the pole piece: The electrode paste is made by mixing positive and negative active materials, binders, and conductive electrodes, and the electrode paste is coated (with a thickness of 400 μm to 1000 μm) on the current collector, and vacuumed at 100 ° C. After drying for 20 hours, press the coated pole pieces under a certain pressure (0-10MPa) and cut them into 1cm×1cm pole pieces.

[0027] Assembly of the sandwich structure: Assemble a battery pack similar to a sandwich structure according to the sequence of titanium frame, positive electrode sheet, diaphragm, negative electrode sheet, and titanium frame, and soak in the electrolyte system containing magnesium ions or zinc ions.

[0028] In order to better illustrate the present invention, a more detailed description is given below with specific examples.

Embodiment 1

[0030] (1) Mix LiMn with a molar ratio of 1:2 2 o 4 and H 2 SO 4 Fully magnetically stirred at 50°C for 3 hours, after decantation, ultrasonication, centrifugation, filtration, drying, grinding, etc., the product λ-MnO was finally prepared 2 , XRD characterization as figure 1 As shown in A;

[0031] (2) Add λ-MnO 2, Ketjen black, and polyvinylidene fluoride are fully mixed under magnetic stirring according to the mass ratio of 8:1:1 to form a slurry, which is evenly coated on the nickel sheet of the current collector, dried in a vacuum oven at 100°C and then cut into a slurry. electrode.

[0032] (3) The coating thickness of the pole piece is 400μm, the area of ​​each pole piece is 1cm×1cm, and the coating amount on one side of the electrode is 5mg / cm;

[0033] (4) The prepared electrode was used as the working electrode, the saturated calomel electrode and the platinum electrode were respectively used as the reference electrode and the counter electrode to form a three...

Embodiment 2

[0036] (1) Mix LiMn with a molar ratio of 1:2 2 o 4 and H 2 SO 4 Fully magnetically stirred at 50°C for 12 hours, after decantation, ultrasonication, centrifugation, filtration, drying, grinding, etc., the product λ-MnO was finally prepared 2 , XRD characterization as figure 1 As shown in B;

[0037] (2) Add λ-MnO 2 , acetylene black, and polyvinylidene fluoride are fully mixed under magnetic stirring according to the mass ratio of 8:1:1 to form a slurry, which is evenly coated on the nickel foam of the current collector, dried in a vacuum oven at 100°C and then cut into a slurry. electrode.

[0038] (3) The coating thickness of the pole piece is 500μm, the area of ​​each pole piece is 1cm×1cm, and the coating amount on one side of the electrode is 6mg / cm;

[0039] (4) The prepared electrode was used as the working electrode, the saturated calomel electrode and the platinum electrode were respectively used as the reference electrode and the counter electrode to form a t...

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Abstract

The invention provides an aqueous rechargeable magnesium / zinc ion capacitor battery. A positive plate comprises a positive current collector and a coating layer, wherein the coating layer is coated on the positive current collector and contains a positive active substance which is lambda-MnO2 in a three-dimensional tunnel spinel structure. A negative plate comprises a negative current collector and a coating layer, wherein the coating layer is coated on the negative current collector and contains a negative active substance which is a carbon-based material of an ion-adsorption / desorption super-capacitor in a porous structure. An electrolyte solution is a water solution containing magnesium ions or zinc ions. The concentration of the magnesium ions or the zinc ions in the electrolyte solution is 0.5mol / L to 10mol / L. By virtue of the aqueous electrolyte solution, the cost is reduced, the safety performance is improved, and environmental pollution is avoided; the aqueous rechargeable magnesium / zinc ion capacitor battery is long in cycle life, large in energy density and applicable to large-current charge and discharge, and is power storage equipment with wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a magnesium / zinc ion capacitor battery. Background technique [0002] At present, renewable and clean energy such as solar energy and wind energy have become research hotspots in various countries, but the peak output of these energy sources often cannot match the energy demand, so an efficient, stable and reliable energy conversion and storage device has become our Top concern. People have developed various forms of energy storage devices, among which lithium-ion batteries have rapidly occupied the market of energy storage devices due to their advantages of high specific energy since their commercialization, and are widely used in cameras, mobile phones, notebook computers and other devices. It has been widely used, but the flammable organic electrolyte used has potential safety hazards during overcharge and overdischarge, which inhibits the application of ...

Claims

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Application Information

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IPC IPC(8): H01M10/36
CPCY02E60/12Y02E60/10
Inventor 曹殿学袁聪俐张莹韦小培王贵领
Owner HARBIN ENG UNIV
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