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Preparation method of carbon nanotube thin film highly loaded mn-co sulfide flexible electrode material

A carbon nanotube film and flexible electrode technology, applied in the field of preparation of ultra-flexible supercapacitor electrodes, can solve problems such as poor cycle performance of bimetallic sulfoxide, achieve good industrial application prospects, simple and convenient operation, experimental conditions and preparation process simple effect

Active Publication Date: 2021-06-22
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, bimetallic sulfides exhibit poor cycle performance

Method used

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  • Preparation method of carbon nanotube thin film highly loaded mn-co sulfide flexible electrode material
  • Preparation method of carbon nanotube thin film highly loaded mn-co sulfide flexible electrode material
  • Preparation method of carbon nanotube thin film highly loaded mn-co sulfide flexible electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of carbon nanotube film with high loading of Mn-Co sulfide flexible electrode material: immerse the commercial carbon nanotube film in 5 wt.% dilute hydrochloric acid and concentrated nitric acid (65-68wt.%) for 2 hours, take it out and wash it several times and freeze-drying; 25 mg cobalt acetate tetrahydrate, 50 mg manganese acetate tetrahydrate and 60 mg urea were successively dissolved in a mixture of 40 mL deionized water and absolute ethanol (water-alcohol volume ratio 1:1), magnetically stirred for 30 min; 40 mL The mixed solution was transferred to a 50mL reaction kettle, and the carbon nanotube film (1 × 2cm 2 ), reacted at 140°C for 3h, rinsed and freeze-dried for 12h to obtain the precursor; then, dissolving 0.01g of thioacetamide in 40mL of absolute ethanol, added the dried precursor, and reacted hydrothermally at 120°C for more than 12h , cleaned after cooling, and freeze-dried for 12 hours; finally, the sample was passed through N 2 Sintered i...

Embodiment 2

[0034] ( Figure 4 a, b) The nitric acid acidification time of the carbon nanotube film was changed to 0.5h, and the other conditions were the same as in Example 1.

Embodiment 3

[0036] ( Figure 4 c, d) The nitric acid acidification time of the carbon nanotube film was changed to 2 hours, and the other conditions were the same as in Example 1.

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Abstract

The invention discloses a preparation method of a novel supercapacitor electrode material: firstly, acidizing a commercial carbon nanotube film, then using cobalt acetate, manganese acetate and urea as raw materials, and utilizing hydrothermal reaction on the acidified carbon nanotube film The smooth Mn-Co precursor uniformly coats the single carbon tube precursor, and then vulcanized; the obtained material is composed of granular Mn 0.1 Co 0.9 S-composite single carbon nanotube carbon nanotube film (single tube diameter is about 288nm); ‑2 The capacitance reaches 449.2F cm at the current density of ‑3 , the capacitance retention rate can still maintain 98.4% under 10000 cycles.

Description

[0001] Technical field The present invention relates to a preparation process of an ultra-flexible supercapacitor electrode, which is characterized in that the commercial carbon nanotube film is modified on the surface, followed by two-step hydrothermal growth of MnCo bimetallic sulfide, and finally heat treatment in an atmosphere furnace. The method does not require any template, is simple to operate, low in cost, good in repeatability, and easy to control. Background technique [0002] With the development of society, energy consumption continues to increase, and energy storage and conversion devices play an important role in it. Energy storage devices include batteries, traditional capacitors and supercapacitors. Supercapacitors are also called electrochemical capacitors. New energy storage devices with electrode materials such as high specific surface area carbon materials, metal oxides, and conductive polymers. Supercapacitors store energy by polarizing electrolytes and h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/30H01G11/36H01G11/86
CPCH01G11/24H01G11/26H01G11/30H01G11/36H01G11/86Y02E60/13
Inventor 唐少春宋伟杰吴娟史曦伶
Owner NANJING UNIV