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CN-121983430-A - Light-assisted battery type super capacitor and preparation method thereof

CN121983430ACN 121983430 ACN121983430 ACN 121983430ACN-121983430-A

Abstract

The invention belongs to the technical field of battery-type supercapacitors, and particularly relates to a light-assisted battery-type supercapacitor and a preparation method thereof, wherein 1-20 mu L of 30% H 2 O 2 solution is added into 1-50mL of 2.5mg/mL of Ti 3 C 2 -MXene colloid solution, H 2 O 2 is used for oxidizing titanium atoms into TiO 2 in situ under magnetic stirring to obtain MXene/TiO 2 mixed colloid solution, the mixed colloid solution is subjected to vacuum filtration to form a film, the film is peeled and dried, a interdigital anode with the area of 0.1-1.0cm 2 is prepared through a laser engraving machine, a zinc foil with the thickness of 0.01-0.1mm is polished and cleaned, interdigital cathodes with the area of 0.1-1.0cm 2 are prepared through a laser engraving machine, the anode and the cathode are fixed on PET plastic films with the thickness of 0.01-0.1mm through glue, and polyacrylamide/zinc triflate gel electrolyte is coated to obtain the light-assisted battery-type supercapacitor, and the light-assisted battery-type supercapacitor is tested under the light condition of 200nm-760nm wavelength.

Inventors

  • CAO ZHIQIAN
  • ZHANG TIANYU
  • YU XINYU
  • ZHANG ZHIYANG

Assignees

  • 淮北师范大学

Dates

Publication Date
20260505
Application Date
20260302

Claims (8)

  1. 1. A preparation method of a light-assisted battery type super capacitor is characterized by comprising the following steps: Adding 1-20 mu L of 30% H 2 O 2 solution into 1-50mL of 2.5mg/mL Ti 3 C 2 -MXene colloidal solution, oxidizing titanium atoms into TiO 2 in situ under magnetic stirring by H 2 O 2 to obtain MXene/TiO 2 mixed colloidal solution, vacuum filtering the mixed colloidal solution into a film, stripping, drying, and preparing an interdigital anode with the area of 0.1-1.0cm 2 by a laser engraving machine; Polishing and cleaning zinc foil with the thickness of 0.01-0.1mm, and preparing an interdigital negative electrode with the area of 0.1-1.0cm 2 by a laser engraving machine; Fixing the positive electrode and the negative electrode on a PET plastic film with the thickness of 0.01-0.1mm by using glue, and coating polyacrylamide/zinc trifluoromethane sulfonate gel electrolyte to obtain the light-assisted battery type supercapacitor; and step four, testing under the illumination condition of 200nm-760nm wavelength.
  2. 2. The method of claim 1, wherein the 30% H 2 O 2 solution in the first step is added in an amount of 2-20. Mu.L, and the Ti 3 C 2 -MXene colloidal solution is added in an amount of 20mL.
  3. 3. The method for manufacturing a photo-assisted cell type supercapacitor according to claim 1, wherein the interdigital anode area prepared by laser engraving in the first step is 0.3cm 2 .
  4. 4. The method for manufacturing a light-assisted cell type supercapacitor according to claim 1, wherein in the second step, the thickness of the zinc foil is 0.02mm, and the area of the interdigital negative electrode prepared by laser engraving is 0.3cm 2 .
  5. 5. The method for manufacturing a photo-assisted cell type supercapacitor according to claim 1, wherein the thickness of the PET plastic film in the third step is 0.02mm.
  6. 6. The method for manufacturing a light-assisted cell type supercapacitor according to claim 1, wherein the wavelength of the light condition in the fourth step is 390nm.
  7. 7. A preparation method of a light-assisted battery type supercapacitor is characterized by comprising an interdigital capacitor type MXene/TiO 2 film positive electrode, an interdigital battery type zinc foil negative electrode, a PET plastic film substrate and polyacrylamide/zinc trifluoromethane sulfonate gel electrolyte, wherein the positive electrode and the negative electrode are fixed on the PET plastic film, and the gel electrolyte is coated on the surfaces of the positive electrode and the negative electrode.
  8. 8. The light-assisted cell type supercapacitor according to claim 7, wherein the operating voltage is 1.3V and the energy density is 97 mu Wh cm -2 .

Description

Light-assisted battery type super capacitor and preparation method thereof Technical Field The invention belongs to the technical field of battery type super capacitors, and particularly relates to a light-assisted battery type super capacitor and a preparation method thereof. Background Super capacitor is used as a novel energy storage device, and has wide application prospect in the fields of portable electronic equipment, new energy automobiles and the like by virtue of the advantages of high power density, rapid charging and discharging capability, long cycle life and the like. The battery type super capacitor tries to combine high energy density and high power density through fusion of Faraday redox reaction of the battery and an electric double layer energy storage mechanism of the super capacitor, and becomes one of research hot spots in the current energy storage field. MXene materials are often used as electrode substrates of supercapacitors due to excellent conductivity, high specific surface area and good electrochemical stability, while TiO 2 is used as a typical photoresponsive semiconductor, and carriers generated under illumination can regulate the electrochemical behaviors of the electrode surfaces, so that a new path is provided for improving the performance of devices. However, the conventional battery type super capacitor still faces a plurality of technical bottlenecks that on one hand, most devices are difficult to realize the cooperative optimization of high energy density and high power density, the energy storage mechanism of the traditional electrode material is single, the breakthrough of the comprehensive performance of the devices is limited, and on the other hand, the energy utilization form is single, and clean energy sources such as solar energy cannot be effectively integrated, so that the energy conversion efficiency of the devices is low, and the increasing low-carbon energy storage requirement cannot be met. In addition, the problems of unsound combination of TiO 2 and a substrate material and high carrier recombination rate exist in the partial light-assisted energy storage device, so that the illumination enhancement effect is not obvious, and the conversion of practical application is difficult to realize. Along with the continuous improvement of the comprehensive performance requirements of the new energy industry on the energy storage device, the development of a novel energy storage device with wide working voltage, high energy density and high energy utilization rate is urgent. In the prior art, the problems of unreasonable electrode structure design, high difficulty in-situ construction of a light response material, poor compatibility of electrolyte and an electrode interface and the like further restrict the performance improvement of the light-assisted battery type super capacitor. Therefore, development of a light-assisted battery type supercapacitor with simple preparation process, stable performance and high efficiency in solar energy utilization is needed to solve the problems of short performance and limited application in the prior art. Disclosure of Invention The invention aims at solving the technical problems and provides a light-assisted battery type super capacitor and a preparation method thereof. In view of the above, the invention provides a method for preparing a photo-assisted battery type super capacitor, comprising the following steps: Adding 1-20 mu L of 30% H 2O2 solution into 1-50mL of 2.5mg/mL Ti 3C2 -MXene colloidal solution, oxidizing titanium atoms into TiO 2 in situ under magnetic stirring by H 2O2 to obtain MXene/TiO 2 mixed colloidal solution, vacuum filtering the mixed colloidal solution into a film, stripping, drying, and preparing an interdigital anode with the area of 0.1-1.0cm 2 by a laser engraving machine; Polishing and cleaning zinc foil with the thickness of 0.01-0.1mm, and preparing an interdigital negative electrode with the area of 0.1-1.0cm 2 by a laser engraving machine; Fixing the positive electrode and the negative electrode on a PET plastic film with the thickness of 0.01-0.1mm by using glue, and coating polyacrylamide/zinc trifluoromethane sulfonate gel electrolyte to obtain the light-assisted battery type supercapacitor; and step four, testing under the illumination condition of 200nm-760nm wavelength. Preferably, the 30% H 2O2 solution in step one is added in an amount of 2-20. Mu.L and the Ti 3C2 -MXene colloidal solution in an amount of 20mL. Preferably, the area of the interdigital anode prepared by laser engraving in the first step is 0.3cm 2. Preferably, in the second step, the thickness of the zinc foil is 0.02mm, and the area of the interdigital anode prepared by laser engraving is 0.3cm 2. Preferably, the thickness of the PET plastic film in the third step is 0.02mm. Preferably, the wavelength of the light conditions in step four is 390nm. The light-assisted battery type super capacitor comprises an interdig