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CN-122025447-A - Electrode and miniature super capacitor as well as preparation method and application thereof

CN122025447ACN 122025447 ACN122025447 ACN 122025447ACN-122025447-A

Abstract

The invention belongs to the technical field of electronic components, and particularly relates to an electrode and a miniature super capacitor as well as a preparation method and application thereof. The preparation method of the electrode comprises the following steps of conducting friction drive additive printing on the surface of a substrate to obtain the electrode, wherein printing ink for friction drive additive printing is dispersion liquid of NiCo 2 S 4 @RGO in 1-methyl-2 pyrrolidone, and the application load of a printing head for friction drive additive printing on the substrate is 0.01N-0.1N. The preparation method provided by the invention has the advantages of high processing precision, no need of a template, no need of an additive, high ink utilization rate and the like. The electrode prepared by the preparation method provided by the invention can be used for preparing the miniature super capacitor, and the prepared miniature super capacitor has excellent energy storage performance.

Inventors

  • LIU WEIMIN
  • XU SHUSHENG
  • YUE KAI
  • QI MINGYANG

Assignees

  • 中国科学院兰州化学物理研究所
  • 青岛市资源化学与新材料研究中心

Dates

Publication Date
20260512
Application Date
20260416

Claims (10)

  1. 1. A method of preparing an electrode comprising the steps of: friction driving additive printing is carried out on the surface of the substrate to obtain an electrode; The friction drive additive printing ink is a dispersion liquid of NiCo 2 S 4 @RGO in 1-methyl-2 pyrrolidone; the application load of the printing head for friction drive additive printing on the substrate is 0.01N-0.1N.
  2. 2. The method of claim 1, wherein the diameter of the friction drive additive printing printhead balls is 0.2-1 mm, and the slip speed of the printhead is 500-3000 μm/s; The sliding period of friction drive additive printing is 500-3000 times, and the printing time is 8-40 min.
  3. 3. The method of manufacturing according to claim 1, wherein the method of manufacturing the ink comprises the steps of: Mixing graphene oxide, a soluble nickel source, a soluble cobalt source, thiourea and water, and performing hydrothermal reaction to obtain NiCo 2 S 4 @RGO; Dispersing the NiCo 2 S 4 @RGO in 1-methyl-2 pyrrolidone to obtain the ink; The mass concentration of NiCo 2 S 4 @RGO in the ink is 3-20wt%.
  4. 4. The preparation method of claim 3, wherein the graphene oxide is a multilayer graphene oxide, and the number of layers of the multilayer graphene oxide is 2-4; the soluble nickel source comprises nickel chloride and the soluble cobalt source comprises cobalt chloride; The mass ratio of the graphene oxide to the nickel element in the soluble nickel source is 30-90 mg/0.2-2 mmol; the molar ratio of the nickel element in the soluble nickel source to the cobalt element in the soluble cobalt source is 0.2-2:0.4-4; the mass and water volume ratio of the graphene oxide is 30-90 mg/40-80 mL; the temperature of the hydrothermal reaction is 150-180 ℃ and the time is 8-16 h.
  5. 5. The method of manufacturing according to claim 1, wherein the substrate comprises a flexible substrate comprising a polyethylene terephthalate substrate or a polyimide substrate; the form of the electrodes comprises interdigitated electrodes.
  6. 6. An electrode prepared by the method of any one of claims 1 to 5.
  7. 7. Use of the electrode of claim 6 for the preparation of a micro supercapacitor.
  8. 8. The preparation method of the miniature super capacitor is characterized by comprising the following steps of: performing friction drive additive printing on the surface of a substrate to obtain a microelectrode, wherein the printing ink for friction drive additive printing is a dispersion liquid of NiCo 2 S 4 @RGO in 1-methyl-2 pyrrolidone, and the application load of a printing head for friction drive additive printing on the substrate is 0.01-0.1N; and (3) coating electrolyte on the surface of the microelectrode to obtain the micro supercapacitor.
  9. 9. The method of manufacturing according to claim 8, wherein the substrate is a flexible substrate; the electrolyte comprises 1-ethyl-3-methylimidazole tetrafluoroborate electrolyte, potassium hydroxide solution or PVA-H 2 SO 4 electrolyte.
  10. 10. A miniature supercapacitor made by the method of claim 8 or 9.

Description

Electrode and miniature super capacitor as well as preparation method and application thereof Technical Field The invention belongs to the technical field of electronic components, and particularly relates to an electrode and a miniature super capacitor as well as a preparation method and application thereof. Background With the rapid development of modern technology, smart wearable devices, flexible electronic skin, and internet of things (IoT) sensors have put new demands on energy storage systems. Flexible Micro Super Capacitors (MSCs) are key technologies for solving the power supply problem of miniaturized flexible electronic devices by virtue of their rapid charge and discharge rate, high power density, long cycle life and excellent mechanical flexibility. However, achieving low cost, high precision and large scale fabrication of flexible micro-supercapacitors still faces significant challenges in the current micro-nano processing field. At present, the main preparation methods of the flexible micro supercapacitor comprise a photoetching process, screen printing and ink-jet printing, but the preparation methods have obvious limitations in practical application, for example, the photoetching process has high precision, but the technology seriously depends on complete sets of equipment such as an expensive photoetching machine, a spin coater, an etching machine and the like, and the preparation methods must be carried out in a strict ultra-clean room. The whole process comprises complicated steps of spin coating, pre-baking, alignment exposure, development, etching, photoresist removal and the like, has long process period, belongs to discontinuous intermittent production, and is difficult to realize rapid and large-flux preparation of devices. The screen printing is relatively low in cost, but also needs a prefabricated mask (screen), is low in resolution, and is difficult to meet the fine requirements of the micro supercapacitor on the micro interdigital electrode, and in addition, the technology is high in ink waste in the printing process, so that the technology is unfavorable for efficient utilization of expensive active materials. Although maskless processing is achieved in inkjet printing, this technique places extremely stringent demands on the rheological properties (e.g., viscosity, surface tension, particle size) of the printing ink, and complex ink formulation tuning is often required to prevent nozzle clogging, which not only increases the technological threshold, but also limits the use of high solids or large particle active materials. Disclosure of Invention In view of the above, the invention provides an electrode, a micro super capacitor, a preparation method and application thereof, and the preparation method of the micro super capacitor provided by the invention realizes low-cost, high-precision and large-scale production. In order to solve the technical problems, the invention provides a preparation method of an electrode, which comprises the following steps: friction driving additive printing is carried out on the surface of the substrate to obtain an electrode; The friction drive additive printing ink is a dispersion liquid of NiCo 2S4 @RGO in 1-methyl-2 pyrrolidone; the application load of the printing head for friction drive additive printing on the substrate is 0.01N-0.1N. Preferably, the diameter of the ball of the printing head for friction drive additive printing is 0.2-1 mm, and the sliding speed of the printing head is 500-3000 mu m/s; The sliding period of friction drive additive printing is 500-3000 times, and the printing time is 8-40 min. Preferably, the preparation method of the ink comprises the following steps: Mixing graphene oxide, a soluble nickel source, a soluble cobalt source, thiourea and water, and performing hydrothermal reaction to obtain NiCo 2S4 @RGO; Dispersing the NiCo 2S4 @RGO in 1-methyl-2 pyrrolidone to obtain the ink; The mass concentration of NiCo 2S4 @RGO in the ink is 3-20wt%. Preferably, the graphene oxide is a multilayer graphene oxide, and the number of layers of the multilayer graphene oxide is 2-4; the soluble nickel source comprises nickel chloride and the soluble cobalt source comprises cobalt chloride; The mass ratio of the graphene oxide to the nickel element in the soluble nickel source is 30-90 mg/0.2-2 mmol; the molar ratio of the nickel element in the soluble nickel source to the cobalt element in the soluble cobalt source is 0.2-2:0.4-4; the mass and water volume ratio of the graphene oxide is 30-90 mg/40-80 mL; the temperature of the hydrothermal reaction is 150-180 ℃ and the time is 8-16 h. Preferably, the substrate comprises a flexible substrate comprising a polyethylene terephthalate substrate or a polyimide substrate; the form of the electrodes comprises interdigitated electrodes. The invention also provides an electrode prepared by the preparation method according to the technical scheme. The invention also provides applicati