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NCS-based planar solid-state interdigital supercapacitor and preparation method thereof
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A supercapacitor, interdigitated technology, applied in the field of NCS-based planar solid interdigitated supercapacitor and its preparation, can solve the problems of low conductivity, poor cycle stability, difficulty, etc., and achieve excellent conductivity, low cost, and simple process. Effect
Active Publication Date: 2021-12-31
CHONGQING UNIV OF TECH
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Problems solved by technology
On the one hand, NCS materials have low conductivity and poor cycle stability, and it is difficult to determine the appropriate composition and ratio to prepare inks for interdigitated supercapacitors with good printability, conductivity and active material dispersion.
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Embodiment 1
[0031] Embodiment one, see figure 1 , the preparation method of the planar solid-state interdigitated supercapacitor based on NCS shown, it comprises the steps:
[0032] Step 1, cleaning of the substrate: first cut the substrate, which is a PET film, then place the cut substrate in acetone, alcohol, and deionized water for ultrasonic cleaning, and finally dry the cleaned substrate for later use.
[0033] Using the mask method to prepare interdigitated current collectors on the surface of the substrate, specifically: fix the mask with the interdigitated pattern on the substrate, and then brush the silver paste on the substrate covered with the mask , dried at a temperature of 80°C for 12 hours, brushed silver paste again and dried for 12 hours, and finally heat-treated at a temperature of 160°C for 1 hour to obtain an interdigitated current collector.
[0039] Embodiment two, different from embodiment one, the NiCo 2 S 4 The hydrothermal reaction temperature of the powder is 200°C, and the rest of the steps and process parameters are the same as those in Example 1.
Embodiment 3
[0040] Embodiment three, different from embodiment one, the NiCo 2 S 4 The hydrothermal reaction temperature of the powder is 220°C, and the rest of the steps and process parameters are the same as those in Example 1.
[0041] Respectively to the NiCo that embodiment one to embodiment three make 2 S 4 The powder was analyzed by XRD, the results can be found in image 3 , showing the XRD diffraction patterns of NCS nanomaterials prepared at different hydrothermal temperatures, the main characteristic peak 2θ values of the product obtained in Example 2 are 31.5°, 38.3°, 50.3° and 55.3°, corresponding to cubic NiCo 2 S 4 (311), (400), (511), (440) crystal planes in the standard diffraction curve. In addition, there are two obvious peaks at 17.3° and 27.4° belonging to NiCo 2 S 4 The crystal planes (111) and (220) of the crystal plane, the diffractionpeak intensity in the spectrum is not high and obviously broadened, indicating that the NCS crystal particles are fine, an...
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Abstract
The invention discloses an NCS-based planar solid interdigital supercapacitor and a preparation method thereof. The preparation method comprises the following steps: step 1, preparing an interdigital current collector on the surface of a substrate by using a mask plate; step 2, uniformly dispersing NiCo2S4 powder, PTFE and CNT into a solvent to obtain printing ink, and adding a mixture of 50-100 mg of NiCo2S4 powder, 5-15 mg of PTFE and 5-15 mg of CNT into every 1 ml of solvent, wherein the solvent is NMP or terpilenol; step 3, loading a NiCo2S4 electrode material on the interdigital current collector: coating the interdigital current collector with ink, drying and separating the mask plate; and step 4, filling the gap of the interdigital electrode with a PVA-KOH-based electrolyte, and packaging to obtain the NCS-based planar solid-state interdigital supercapacitor. By using the good pseudocapacitance characteristic of the NiCo2S4 electrode material, the supercapacitor has excellent specific capacitance, power density and stability, the preparation process is simple, and the cost is low.
Description
technical field [0001] The invention relates to a supercapacitor, in particular to an NCS-based planar solid-state interdigitated supercapacitor and a preparation method. Background technique [0002] At present, the rapid development of the Internet and electronic technology has put forward a huge market demand for micro energy storage devices. Compared with traditional energy storage devices such as fuel cells and lithium batteries, supercapacitors not only have the characteristics of high power density and fast charge and discharge speed, It is easier to realize miniaturization, integration and flexibility, so it has attracted much attention as a micro energy storage device. Among them, the planar solid-state interdigitated supercapacitor is an all-solid-state two-dimensional structure energy storage unit attached to a flexible substrate, which is easy to integrate with other portable microelectronic devices, which is conducive to achieving higher integration and flexibil...
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