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Preparation method for nanometer graded porous carbon material used for high-performance electrochemical supercapacitor based on rice hull ash

A technology of supercapacitor and graded porous carbon, which is applied in the manufacture of hybrid/electric double-layer capacitors, electrodes of hybrid capacitors, etc., can solve the problems of environmental pollution and resource waste, and achieve a large specific surface area, save resources, and be conducive to environmental protection. Effect

Inactive Publication Date: 2016-02-10
扬州安驰新材料有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that rice husk ash is a cheap and easy-to-obtain agricultural waste with a wide range of sources, most of which are discarded, which not only causes waste of resources, but also pollutes the environment. A method for nanoscaled porous carbon materials for high performance electrochemical supercapacitors

Method used

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  • Preparation method for nanometer graded porous carbon material used for high-performance electrochemical supercapacitor based on rice hull ash
  • Preparation method for nanometer graded porous carbon material used for high-performance electrochemical supercapacitor based on rice hull ash
  • Preparation method for nanometer graded porous carbon material used for high-performance electrochemical supercapacitor based on rice hull ash

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specific Embodiment approach 1

[0019] Embodiment 1: A method for preparing a nanoscale porous carbon material for high-performance electrochemical supercapacitors based on rice husk ash in this embodiment, specifically operates according to the following steps:

[0020] 1. Add rice husk ash to hydrofluoric acid under stirring conditions, and stir evenly to obtain a suspension; wherein, the volume concentration of hydrofluoric acid is 1% to 10%, and the stirring time is 12 to 24 hours;

[0021] 2. Wash the suspension obtained in step 1 with distilled water, and then dry it. The drying process is as follows: place it in a vacuum drying oven, and dry it at a temperature of 50-80°C for 12-24 hours;

[0022] 3. Add KOH to the sample obtained after drying in step 2 for activation, and carbonize in a tube furnace; wherein, the mass ratio of the sample to KOH is 1: (1-5), the activation temperature is 600-1000°C, and the holding time is 1~2h;

[0023] 4. Repeatedly wash the carbonized sample obtained in step 3 wit...

specific Embodiment approach 2

[0025] Embodiment 2: This embodiment differs from Embodiment 1 in that: the volume concentration of hydrofluoric acid in step 1 is 2% to 10%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0026] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that the mixing and stirring time of hydrofluoric acid in step 1 is 12-20 hours. Others are the same as in the first or second embodiment.

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Abstract

A preparation method for a nanometer graded porous carbon material used for a high-performance electrochemical supercapacitor based on rice hull ash is disclosed, relating to the preparation of the nanometer graded porous carbon material. The preparation method comprises the following steps: 1, performing pore-forming on raw materials; 2, activating the pore-formed products; 3, performing vacuum drying; and 4, carbonizing the activated product to obtain the required nanometer porous carbon material. The preparation method takes the rice hull ash as the raw materials to prepare the nanometer graded porous carbon material that is applied to the electrochemical supercapacitor; the preparation method has the characteristics of simple operation, low production cost, resource conservation and capability of promoting commercialization and protecting the environment; and in addition, the nanometer graded porous carbon material is higher in the degree of graphitization, better in the multi-level porous channel structure, and higher in the specific capacity and stability.

Description

technical field [0001] The invention relates to a method for preparing a nanoscale porous carbon material for high-performance electrochemical supercapacitors based on rice husk ash. Background technique [0002] In recent decades, with the rapid development of the global economy, the demand for energy has increased day by day. Coal, oil, natural gas, chemical energy, nuclear fuel, etc. have been widely used as energy supplies, and the rapid consumption of fossil fuels has caused environmental pollution. Nowadays, people urgently need a clean, efficient and sustainable energy source to meet the needs of social development and sustainable economic development. In the process of energy utilization, energy storage is an indispensable technology, which has attracted more and more attention of scientific researchers. In the field of economic development and application, the most practical and effective energy storage technologies mainly include supercapacitors, fuel cells, and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/44H01G11/24H01G11/86
CPCY02E60/13H01G11/44H01G11/24H01G11/86
Inventor 蒋保江黄雨晴田春贵付宏刚江勇栾玉婷郭世恩
Owner 扬州安驰新材料有限公司
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