A kind of zinc-cobalt double metal oxide sandwich structure flexible film electrode and preparation method thereof

A bimetallic oxide and flexible film technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of low energy density, narrow applicable voltage window, and poor cycle stability of supercapacitors, and achieve good electrolyte Good absorption capacity, large voltage range, and good stability

Active Publication Date: 2021-10-26
GUANGXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a simple synthesis of zinc-cobalt bimetal for the deficiencies in the prior art such as low energy density, narrow applicable voltage window and poor cycle stability of supercapacitors assembled with zinc-cobalt double oxide and bio-based material composite flexible electrodes. Oxide sandwich structure flexible film electrode and its preparation method, using zinc-cobalt double metal oxide to provide pseudocapacitance, multi-walled carbon nanotubes to provide electric double layer capacitance, cellulose nanofibrils as dispersant and flexible substrate, through pumping A flexible and light-weight thin-film electrode material is prepared by filtration, and a flexible electrode material with a large voltage window, good stability, and light weight can be prepared, and its energy density can be increased without reducing the power density of the capacitor. It can be applied to portable device

Method used

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  • A kind of zinc-cobalt double metal oxide sandwich structure flexible film electrode and preparation method thereof
  • A kind of zinc-cobalt double metal oxide sandwich structure flexible film electrode and preparation method thereof
  • A kind of zinc-cobalt double metal oxide sandwich structure flexible film electrode and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] S1. The 7G mass fraction of 1 wt% cellulose nanofil solution and 0.07 g of multi-wall carbon nanotubes were dispersed in 39.58 ml of deionized water, and the ultrasonic dispersion was dispersed for 30min (power 600W), magnetic force for 30min (700 r / min), obtained Uniform 0.3 wt% cellulose nanofilament - multi-wall carbon nanotube dispersion;

[0039]S2. Take 0.328 g of 2-methylimidazole in 25 ml of methanol, it is recorded as solution A, magnetic force is stirred for 10 min (600 r / min); 0.323 g of hexahydrate nitrate and 0.06 g of hexahydrate zinc is dissolved in 25 ml methanol, remember For solution B, magnetic force was stirred for 10 min (600 r / min), mixed with A, B, and was stirred for 10 min (600 r / min), at room temperature for 24 h, centrifugation (6500 r / min) to obtain purple precipitation, water water Ethanol was washed three times, vacuum dried at 80 ° C to give zinc-cobalt bimetal organic skeleton complexes. The zinc-cobalt bimetal organic skeleton comp...

Embodiment 2

[0047] S1. A 13 g mass fraction of 1 wt% cellulose nanofil solution and 0.13 g of multi-wall carbon nanotubes were dispersed in 38.87 ml of deionized water, and the ultrasonic dispersion was dispersed by 30 min (power 600W), and the magnetic force was stirred for 30min (700 r / min), obtained Uniform 0.5 wt% cellulose nanofilament - multi-wall carbon nanotube dispersion;

[0048] S2. Take 0.328 g of 2-methylimidazole in 25 ml of methanol, it is recorded as solution A, magnetic force is stirred for 10 min (600 r / min); 0.323 g of hexahydrate nitrate and 0.06 g of hexahydrate zinc is dissolved in 25 ml methanol, remember For solution B, magnetic force was stirred for 10 min (600 r / min), mixed with A, B, and was stirred for 10 min (600 r / min), and 24 h was placed at room temperature. Centrifugation (6500r / min) was 8 min to give purple precipitate, washed three times with anhydrous ethanol, and vacuum dried at 80 ° C to give zinc-cobalt bimetal organic skeleton complex. The zin...

Embodiment 3

[0056] S1. The 7G mass fraction of 1 wt% cellulose nanofil solution and 0.07 g of multi-wall carbon nanotubes were dispersed in 39.58 ml of deionized water, and the ultrasonic dispersion was dispersed for 30min (power 600W), magnetic force for 30min (700 r / min), obtained Uniform 0.3 wt% cellulose nanofilament - multi-wall carbon nanotube dispersion;

[0057] S2. Take 0.328 g of 2-methylimidazole in 25 ml of methanol, it is recorded as solution A, magnetic force is stirred for 10 min (600 r / min); 0.323 g of hexahydrate nitrate and 0.06 g of hexahydrate zinc is dissolved in 25 ml methanol, remember For solution B, magnetic force was stirred for 10 min (600 r / min), mixed with A, B, and was stirred for 10 min (600 r / min), and 24 h was placed at room temperature. Centrifugation (6500r / min) was 8 min to give purple precipitate, washed three times with anhydrous ethanol, and vacuum dried at 80 ° C to give zinc-cobalt bimetal organic skeleton complex. The zinc-cobalt bimetal org...

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Abstract

The invention provides a method for preparing a zinc-cobalt double metal oxide sandwich structure flexible film electrode, based on the vacuum filtration method, (1) dispersing cellulose nanofibrils and multi-walled carbon nanotubes in water, ultrasonic, magnetic Stir to obtain a uniform dispersion of cellulose nanofibrils-multi-walled carbon nanotubes; (2) disperse cellulose nanofibrils and zinc-cobalt double metal oxides in water, ultrasonically and magnetically stir to obtain uniform cellulose Nanofibril-zinc-cobalt double metal oxide dispersion; (3) cellulose nanofibril-multiwall carbon nanotube dispersion and cellulose nanofibril-zinc-cobalt double metal oxide dispersion are successively suction filtered Forming a film to obtain a flexible film electrode with a sandwich structure of coating layer-sandwich layer-coating layer-sandwich layer-coating layer. The invention aims to prepare a high-performance flexible and lightweight electrode material, which has broad application prospects in the fields of portable electronics and energy products.

Description

Technical field [0001] The present invention belongs to the preparation of supercapacitor electrodes, and in particular, the present invention relates to a zinc-cobalt bis metal oxide sandwich structure flexible thin film electrode and a preparation method thereof. Background technique [0002] The supercapacitor is a new energy storage device between the traditional battery and the electrolytic capacitor. The power density is higher than the battery, and the energy density is higher than the traditional capacitor. It has a wide range of temperature range and high safety factor. It has become a new industry in the field of chemical power supply. Highlight. Depending on the charge and discharge electric mechanism, the supercapacitor is divided into two-electric layer capacitors and Faramis capacitors, and the duplexer capacitor uses the potential difference formed by the surface of the positive and negative electrode, and has higher stability and cycles by the charge adsorption / ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/46H01G11/26
CPCH01G11/26H01G11/46H01G11/86
Inventor 李凯刘文青尚煜豪崔斐李坚斌
Owner GUANGXI UNIV
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