Novel anodic oxidation process of nickel-based thin film energy storage material

An energy storage material and anodic oxidation technology, which is applied in anodic oxidation, hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, etc., can solve problems such as insufficient electrolyte oxidation, poor controllability, and poor cycle stability , to achieve the effect of improving capacitance performance and electrochemical stability, short oxidation time and good controllability

Inactive Publication Date: 2020-03-31
SHENYANG NORMAL UNIV
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AI-Extracted Technical Summary

Problems solved by technology

The advantage of the former is that it is simple and easy to form a film, but its disadvantage is that the controllability is very poor, the cycle stability of the electrode material is insufficient, and post-treatm...
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Method used

The present invention adopts the method that adopts electrochemical oxidation in alkaline system, the mode that adds prooxidant in the alkaline solution close to supercapacitor electrolyte improves electrochemical oxidation capacity, and this prooxidant does not occur in final Doping in the electrode material, the electrochemical process of the present invention adopts the method of constant potential, which is simple and easy to implement, and has good controllability. After electrochemical testing, it is found that the initial capacitance has increased by 50-60%, and the 8000 cycle charge and discharge capacitance is almost no Attenuation, thus improving the capacitive performance and cycle stability performance after electrochemical oxidation.
[0035] Water bath treatment is used to do Co doping to NNO to improve the conductivity of the nickel-based anodized film, so as to achieve the purpose of increasing the charge and discharge rate. However, the charge-discharge rate of NNO/Co is slightly improved only in the initial stage of charge-discharge, and its charge-discharge rate has not been improved as the charge-discharge progresses. The electrode material was prepared by this comparative example method, and the results showed that the nickel-based composite film exhibited obvious capacitance characteristics through electrochemica...
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Abstract

The invention belongs to the technical field of new material preparation, and relates to a novel anodic oxidation process of a nickel-based thin film energy storage material. Aiming at the existing defects of an electrochemical oxidation process in a method of preparing a NiO/Ni(OH)2 supercapacitor electrode material with excellent performance by a method of firstly preparing a nickel-based metalfilm and then carrying out electrochemical oxidation, a mode of adding a co-oxidant into an electrolyte is provided, the influence of the concentration of the co-oxidant and other electrochemical parameters on the capacitance performance of the prepared nickel oxide/nickel hydroxide electrode material is researched, a novel electrochemical oxidation process of the nickel-based metal thin film energy storage material is simple and easy to implement and good in controllability, and the capacitance performance and the electrochemical stability of the prepared nickel oxide/nickel hydroxide electrode material are improved.

Application Domain

AnodisationHybrid capacitor electrodes +1

Technology Topic

Anodic oxidationCapacitance +12

Image

  • Novel anodic oxidation process of nickel-based thin film energy storage material
  • Novel anodic oxidation process of nickel-based thin film energy storage material
  • Novel anodic oxidation process of nickel-based thin film energy storage material

Examples

  • Experimental program(1)
  • Comparison scheme(3)

Example Embodiment

[0029] Example 1
[0030] In this embodiment, a thin copper sheet with a thickness of 0.5 mm is used as the substrate, and pure Ni and NiB coatings with a thickness of 3 μm are respectively deposited on the surface by an electroless plating method, and then two are prepared by oxidation under the preferred electrochemical oxidation process conditions of the present invention. A NiO/NiOH supercapacitor electrode material. The electrochemically oxidized sample without the auxiliary oxidant A was used as a comparative test. A three-electrode system was used to study the capacitance performance and electrochemical stability of the oxidized nickel-based thin film energy storage electrode material. Test cyclic voltammetry and constant current charge and discharge in a typical supercapacitor electrolyte (in 2MKOH solution) to evaluate the capacitance performance and electrochemical stability of the electrode material, and use a three-electrode system to study the oxidized nickel-based thin film energy storage electrode The capacitance performance and electrochemical stability of the material, in a typical supercapacitor electrolyte (in 2MKOH solution), the main tests are cyclic voltammetry and constant current charge and discharge to evaluate the capacitance performance and electrochemical stability of the electrode material;
[0031] It was found that the initial capacitance of the oxidized electrode material in the presence of pro-oxidant A was increased by 50-60% compared with that without pro-oxidant (pure nickel film energy storage material increased by 56%; NiB film energy storage material increased by 61% ,see figure 1 with figure 2 ), after 8000 cycles of cyclic voltammetry charge and discharge with a sweep rate of 50mV/s, the capacitance performance of the two nickel-based energy storage materials did not decrease (see image 3 with Figure 4 ), which shows that the sample oxidized by the oxidation process of the present invention has good electrochemical stability. This repeated experiment more than 3 times, the reproducibility of the data is good, indicating that the process is simple and easy to implement, and the controllability is good.

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Description & Claims & Application Information

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