Carbon/manganese oxide composite material, preparation method thereof and application thereof

A composite material and manganese oxide technology, which is applied in the manufacture of hybrid/electric double layer capacitors and hybrid capacitor electrodes, can solve the problems of low manganese oxide load temperature, unsatisfactory specific capacitance, etc., and achieve the effect of improving capacitance output capacity

Inactive Publication Date: 2017-05-17
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the charcoal they used was an unactivated carbon material, and the loading temperature of manganese oxide in the preparation process was low, so the specific capacitance of the prepared charcoal material and the charcoal / manganese oxide composite material were not ideal, respectively 19F / g and 101F / g (RSC Adv., 2016, 6, 64811)
So far, there has been no report of using wood as a raw material to prepare activated carbon materials first, and then prepare high-performance and low-cost carbon / manganese oxide composite supercapacitor electrode materials by high-temperature hydrothermal method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of carbonized wood toner

[0028] 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 to 5% under nitrogen protection. The speed of ℃ / min is raised from room temperature to 1000 ℃, and kept at this temperature for 1 hour to remove volatile organic compounds and carbonize solid residues at the same time. When the temperature drops to room temperature, brown-black carbonized charcoal powder is obtained. Then 21g of the obtained carbonized product was uniformly mixed with 1L of 1mol / L dilute hydrochloric acid, stirred at room temperature for 20min, and then stood for 3h. After standing, the resulting mixture was filtered, washed directly with deionized water until neutral, and then placed in a vacuum at 90°C. Dry in a drying oven for 24 hours to obtain 19 g of primary wood toner powder....

Embodiment 2

[0038] (1) Preparation of carbonized wood toner

[0039] 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 1.5 hours to remove volatile organic compounds and carbonize solid residues at the same time. When the temperature drops to room temperature, brown-black carbonized charcoal powder is obtained. Then 23g of the obtained carbonized product was uniformly mixed with 1L of 1mol / L dilute hydrochloric acid, stirred at room temperature for 20 minutes and then left to stand for 3.5 hours. After standing, the obtained mixture was filtered, washed directly with deionized water until neutral, and then placed at 80°C Dry in a vacuum oven for 24 hours to obtain 21 g of primary wood toner p...

Embodiment 3

[0046] (1) Preparation of carbonized wood toner

[0047] 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 °C / min is raised from room temperature to 800 °C, and kept at this temperature for 2 hours to remove volatile organic compounds and carbonize solid residues. When the temperature drops to room temperature, brown-black carbonized charcoal powder is obtained. Then 25g of the obtained carbonized product was uniformly mixed with 1L of 1mol / L dilute hydrochloric acid, stirred at room temperature for 20min, and then stood for 4h. After standing, the resulting mixture was filtered, washed directly with deionized water until neutral, and then placed in a vacuum at 100°C. Dry it in a drying oven for 12 hours to obtain 22.5 g of primary wood toner powder.

[0048]...

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PUM

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Abstract

The present invention provides a carbon/manganese oxide composite material and a preparation method thereof. The carbon/manganese oxide composite material can be used as a supercapacitor electrode material. According to the carbon/manganese oxide composite material and the preparation method thereof of the invention, cheap, environmentally friendly, renewable and easily available wood flour is adopted as a raw material to prepare the carbon/manganese oxide composite material, the preparation method of the invention is advantageous in low cost compared with methods according to which excellent but expensive carbon materials such as ordered mesoporous carbon, graphene, carbon nanotubes and fullerenes are adopted; the carbon material in the composite material of the invention is an activated carbon material, and the activated carbon material itself can contribute high capacitance; and manganese oxide is loaded in situ on the surface of the activated carbon material through a high-temperature hydrothermal oxidation reaction, and therefore, the capacitance output capacity of the composite material can be improved.

Description

[0001] (1) Technical field [0002] The invention relates to a supercapacitor electrode material and its preparation method and application, in particular to a low-cost carbon / manganese oxide composite material prepared from wood flour, which can be used as a supercapacitor electrode material. [0003] (2) Background technology [0004] Supercapacitor is a new type of electrical energy storage device between traditional capacitors and batteries. It has many significant advantages such as large capacity, high power density, strong charge and discharge capacity, long cycle life, ultra-low temperature operation, and no pollution. There are a wide range of applications in automobiles (especially electric vehicles, hybrid fuel vehicles and special trucks), electric power, railways, communications, national defense, and consumer electronics. Electrode materials are key factors in the various components of supercapacitors that affect their performance and production cost. Based on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/44H01G11/34H01G11/46H01G11/86
CPCY02E60/13H01G11/24H01G11/34H01G11/44H01G11/46H01G11/86
Inventor 陈浩沈哲红楼高波俞帅沈亚伦傅深渊
Owner ZHEJIANG FORESTRY UNIVERSITY
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