Carbon/nickel-cobalt layered double hydroxide composite material and preparation method and application thereof

A technology of composite materials and hydroxides, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve problems such as no research, and achieve the effect of improving capacitance output capability, enhancing stability, and good supercapacitor performance

Inactive Publication Date: 2016-04-13
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far there is no report on the use of wood-derived carbon materials for the preparation of carbon / metal layered double hydroxide composites, let alone the preparation of nitrogen-doped activated wood carbon / nickel-cobalt layered double hydroxide composites. Related research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of carbonized wood toner

[0027] Poplar wood powder (manufacturer: Longyou Mubang Chemical Co., Ltd., size: 100 mesh, ash content ≤ 5%, moisture content ≤ 5%) 80g is placed in the program temperature-controlled tube furnace, and the temperature is increased by 2 under nitrogen protection. The speed of ℃ / min is raised from room temperature to 800 ℃, and kept at this temperature for 1.5 hours to remove volatile organic compounds and carbonize solid residues at the same time. Promptly obtain brown black carbonized charcoal powder 25g after temperature is down to room temperature.

[0028] (2) Preparation of Activated Charcoal Powder

[0029] Mix 10g of the carbonized product prepared in step (1) with 40g of potassium hydroxide and 50mL of water (mass ratio 1:4:5), stir evenly and heat in an oven at 100°C until the water content in the mixture is 22% of the initial amount of water added. % (that is, the resulting mixture was heated in an oven to evaporate...

Embodiment 2

[0039] (1) Preparation of carbonized wood toner

[0040] Poplar wood powder (manufacturer: Longyou Mubang Chemical Co., Ltd., size: 100 mesh, ash content ≤ 5%, moisture content ≤ 5%) 80g is placed in the program temperature-controlled tube furnace, and the temperature is increased by 3 under nitrogen protection. The speed of ℃ / min is raised from room temperature to 900 ℃, and kept at this temperature for 1 hour to remove volatile organic compounds and carbonize solid residues at the same time. When the temperature was down to room temperature, 22 g of brown-black carbonized charcoal powder was obtained.

[0041] (2) Preparation of Activated Charcoal Powder

[0042] Mix 10 g of the carbonized product prepared in step (1) with 45 g of sodium hydroxide and 50 mL of water (mass ratio 1:4.5:5), stir evenly, and heat in an oven at 90°C until the water content in the mixture is 25% of the initially added water. % (that is, the resulting mixture was heated in an oven to evaporate 37...

Embodiment 3

[0049] (1) Preparation of carbonized wood toner

[0050] Poplar wood powder (manufacturer: Longyou Mubang Chemical Co., Ltd., size: 100 mesh, ash content ≤ 5%, moisture content ≤ 5%) 80g is placed in a program temperature-controlled tube furnace, and the temperature is set at 1 The speed of °C / min is raised from room temperature to 700 °C, and kept at this temperature for 2 hours to remove volatile organic compounds and carbonize solid residues. Promptly obtain brown black carbonized charcoal powder 25g after temperature is down to room temperature.

[0051] (2) Preparation of Activated Charcoal Powder

[0052] Mix 10g of the carbonized product prepared in step (1) with 45g of potassium hydroxide and 60mL of water (mass ratio 1:4.5:6), stir evenly and heat in an oven at 100°C until the water content in the mixture is 20% of the initially added water. % (that is, the resulting mixture was heated in an oven to evaporate 48 g of water) to obtain a black gelatinous slurry. Then...

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Abstract

The invention provides a carbon / nickel-cobalt layered double hydroxide composite material which is prepared according to the following method that carbonization treatment is performed on raw material wood powder under the atmosphere of nitrogen; then the carbonized product is uniformly mixed with alkali and water, and most of the water of the mixture is heated and evaporated and then activation treatment is performed so that alkali activated charcoal powder is prepared; the alkali activated charcoal powder is added in a nitrogen doped solution, and hydrothermal reaction is performed ultrasonic uniform mixing so that nitrogen doped activated charcoal powder is prepared; the nitrogen doped activated charcoal powder is added in deionized water, and the mixed solution of nickel salt and cobalt salt is added after dispersion; an alkali solution is added after temperature rising and stirring, and heat preservation and stirring reaction is continued; and then the reaction solution is post-treated so that the finished product is obtained. Low-cost, environment-friendly, renewable and easily obtaining wood material acts as the raw material to prepare carbon material used for manufacturing of the carbon / nickel-cobalt layered double hydroxide composite material used for a supercapacitor so that the cost advantage is obvious. Besides, stability of the composite material can be enhanced by the nitrogen doped feature of the carbon material in the composite material so that capacitance output capability of the composite material can be enhanced.

Description

(1) Technical field [0001] The invention relates to a supercapacitor electrode material and a preparation method thereof, in particular to a low-cost carbon / nickel-cobalt layered double hydroxide composite material prepared from wood flour, which can be used as a supercapacitor electrode material . (2) Background technology [0002] Supercapacitor is a new type of electrical energy storage device, which has the advantages of high energy density and high power density. Electrode materials in various components of supercapacitors are the key factors affecting the performance and production cost of supercapacitors. Based on the charge storage mechanism, supercapacitor electrode materials are usually divided into electric double-layer capacitor materials and faradaic pseudocapacitive materials (also known as redox capacitor materials). In recent years, the continuous pursuit of high-performance electrode materials has led to the rapid development of composite supercapacitor el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/30H01G11/86
CPCY02E60/13H01G11/86H01G11/24H01G11/26H01G11/30
Inventor 沈哲红陈浩沈亚伦俞帅刘铎鲍滨福
Owner ZHEJIANG FORESTRY UNIVERSITY
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