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Preparation method of Co9S8 quantum dot in-situ embedded CoNi-LDH electrode material

A technology of electrode materials and quantum dots, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of slow volume change, ion diffusion, high electrochemical performance, etc., and achieve the effects of easy exposure, good electrochemical capacity performance, and promotion of superelectric performance

Pending Publication Date: 2022-05-27
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the large volume change and slow ion diffusion issues of metal sulfides are still the main constraints for scaling up high electrochemical performance.

Method used

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  • Preparation method of Co9S8 quantum dot in-situ embedded CoNi-LDH electrode material
  • Preparation method of Co9S8 quantum dot in-situ embedded CoNi-LDH electrode material
  • Preparation method of Co9S8 quantum dot in-situ embedded CoNi-LDH electrode material

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Experimental program
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Effect test

Embodiment 1

[0044] Step 1. Processing of carbon cloth: First, cut the carbon cloth to 2cm 2 Then the carbon was placed in the lining of a polytetrafluoroethylene reaction kettle containing concentrated nitric acid solution, and it was completely sealed and placed in an oven. The oven temperature was kept at 100 °C and kept for 1 h. After cooling down naturally, use acetone, deionized water, and absolute ethanol for repeated ultrasonic cleaning for 30 minutes, dry at room temperature, and let stand for later use;

[0045] Step 2. Nickel nitrate hexahydrate (Ni(NO) 3 ) 2 ·6H 2 O, 0.9g, 0.003mol), the organic ligand 1,3,5-benzenetricarboxylic acid (H 3 BTC, 0.9g, 0.004mol), N,N-dimethylformamide (DMF, 48mL), mixed and stirred at room temperature for 30min to obtain mixed solution A;

[0046] Step 3. Transfer the mixed solution A obtained in step 2 into a polytetrafluoroethylene reaction kettle, then put it into an oven, react at 120 °C for 24 hours, and then heat at 5 °C for min -1 The ...

Embodiment 2

[0051] Step 1. Processing of carbon cloth: First, cut the carbon cloth to 2cm 2 Then, the carbon was placed in the lining of the polytetrafluoroethylene reaction kettle containing concentrated nitric acid solution, and it was completely sealed and placed in an oven. The oven temperature was kept at 140 °C and kept for 4 h. After cooling down naturally, use acetone, deionized water, and absolute ethanol for repeated ultrasonic cleaning for 30 minutes, dry at room temperature, and let stand for later use;

[0052] Step 2. Nickel nitrate hexahydrate (Ni(NO) 3 ) 2 ·6H 2 O, 0.9g, 0.003mol), the organic ligand 1,3,5-benzenetricarboxylic acid (H 3 BTC, 0.9g, 0.004mol), N,N-dimethylformamide (DMF, 48mL), mixed and stirred at room temperature for 30min to obtain mixed solution A;

[0053] Step 3. Transfer the mixed solution A obtained in step 2 into a polytetrafluoroethylene reaction kettle, then put it into an oven, react at 120 °C for 24 hours, and then heat at 5 °C for min -1 T...

Embodiment 3

[0059] Step 1. Processing of carbon cloth: First, cut the carbon cloth to 2cm 2 Then, the carbon was placed in the lining of the polytetrafluoroethylene reaction kettle containing concentrated nitric acid solution, and it was completely sealed and placed in an oven. The oven temperature was kept at 100 °C and kept for 2 h. After cooling down naturally, use acetone, deionized water, and absolute ethanol for repeated ultrasonic cleaning for 30 minutes, dry at room temperature, and let stand for later use;

[0060] Step 2. Nickel nitrate hexahydrate (Ni(NO) 3 ) 2 ·6H 2 O, 0.9g, 0.003mol), the organic ligand 1,3,5-benzenetricarboxylic acid (H 3 BTC, 0.9 g, 0.004 mol), N,N-dimethylformamide (DMF, 48 mL), mixed and stirred at room temperature for 30 min to obtain mixed solution A.

[0061] Step 3. Transfer the mixed solution A obtained in step 2 into a polytetrafluoroethylene reaction kettle, then put it into an oven, react at 120 °C for 24 hours, and then heat at 5 °C for min ...

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Abstract

The invention relates to a preparation method of a Co9S8 quantum dot in-situ embedded CoNi-LDH electrode material, and solves the problems of large volume change and slow ion diffusion, which are main restricting factors for expanding high electrochemical performance in the prior art. The preparation method comprises the following steps: firstly, selecting flexible carbon cloth as a substrate, self-assembling metal salt nickel nitrate hexahydrate and an organic ligand 1, 3, 5-benzene tricarboxylic acid into an in-situ growth Ni-MOF material by using a solvothermal method, introducing Co < 2 + > and Ni < 2 + > ions through cobalt nitrate and nickel nitrate for replacement, and etching an in-situ growth CoNi-LDH material, so as to obtain the in-situ growth CoNi-MOF / CoNi-LDH composite material. And finally, thioacetamide (TAA) is used as a sulfur source for selective vulcanization, so that Co9S8 is embedded into the CoNi-LDH nanosheet in situ, and the Co9S8 / CoNi-LDH composite electrode material with the Co9S8 quantum dots is obtained.

Description

Technical field: [0001] The invention belongs to the technical field of supercapacitor electrode materials for energy storage, and relates to a "Co 9 S 8 "Preparation of quantum dots in-situ intercalation of CoNi-LDH electrode materials. Background technique: [0002] Due to the energy crisis caused by environmental pollution, explore clean, efficient, low energy consumption, renewable energy and storage devices with excellent performance. Supercapacitors Conventional capacitors feature fast charge / discharge efficiency, high power density, high cycle life, and environmental friendliness. Layered double hydroxides are widely used as energy storage electrodes due to their unique layered structure and high electrical conductivity resulting in fast ion transport channels. In order to explore materials with abundant active sites and higher redox activity, a part of a metal element of LDHs was selectively formed into a highly active energy storage group, while maintaining the o...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/46
CPCH01G11/30H01G11/46Y02E60/13
Inventor 李子涵张亚男陈俊雷黄文欢
Owner SHAANXI UNIV OF SCI & TECH
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