Straw microwave hydrothermal-based super-capacitor activated carbon electrode material preparation system and method

A supercapacitor, microwave hydrothermal technology, applied in the direction of hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, chemical instruments and methods, etc., can solve the problems of underdeveloped internal pore structure and limited specific surface area of ​​carbon materials, so as to promote Industrialized production, reduced water consumption, high porous structure effect

Pending Publication Date: 2019-12-10
HUAZHONG AGRI UNIV
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  • Application Information

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Problems solved by technology

The hydrothermal carbonization method refers to the carbonization process carried out in a closed pressure vessel with water as the solvent at a certain temperature (high temperature: 300-800°C; low temperature: about 200°C). The abundant oxygen-containing functional groups are helpful to the generation of pseudocapacitance and improve the performance of electrode materials, but the specific surface area of ​​carbon materials is limited and the internal pore structure is not well developed.

Method used

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  • Straw microwave hydrothermal-based super-capacitor activated carbon electrode material preparation system and method
  • Straw microwave hydrothermal-based super-capacitor activated carbon electrode material preparation system and method
  • Straw microwave hydrothermal-based super-capacitor activated carbon electrode material preparation system and method

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preparation example Construction

[0057] A method for preparing activated carbon electrode materials for straw microwave hydrothermal based supercapacitors using the above system, characterized in that it comprises the following steps:

[0058] Step 1: Send straw with any moisture content into the pulverizer 2 through the straw discharge port of the straw silo 1 for crushing;

[0059] Step 2: sending the crushed straw and the phosphoric acid in the phosphoric acid storage tank 3 into the microwave hydrothermal reaction kettle 4 through the tee pipe, so that the mixture of straw and phosphoric acid undergoes microwave hydrothermal reaction;

[0060] Step 3: Through the liquid recovery device inside the microwave hydrothermal reaction kettle 4, 30-50% of the liquid product after the hydrothermal reaction enters the phosphoric acid storage tank 3 through the liquid return outlet of the microwave hydrothermal reaction kettle 4, and at the same time, passes The sensor in the phosphoric acid storage tank 3 detects t...

Embodiment 1

[0089] Step 1: Send rice straw with any moisture content into the pulverizer 2 through the straw discharge port of the straw silo 1 for pulverization;

[0090] Step 2: Send the crushed rice straw and 10% phosphoric acid into the microwave hydrothermal reaction kettle 4 through the rounded confluent tee pipe, and make the mixture of rice straw and 10% phosphoric acid undergo microwave hydrothermal reaction at 260°C for 60 minutes ;

[0091] Step 3: After the reaction in step 2 is completed, part of the liquid enters the phosphoric acid storage tank 3 through the liquid return outlet of the microwave hydrothermal reactor 4 through the liquid recovery device inside the microwave hydrothermal reactor 4, and passes through the phosphoric acid storage tank 3 at the same time The sensor in the tank detects the concentration of phosphoric acid, and the concentration of phosphoric acid in the control tank is 10%, and then the remaining solid-liquid mixture in the microwave hydrothermal...

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Abstract

The invention discloses a straw microwave hydrothermal-based super-capacitor activated carbon electrode material preparation system. A microwave low-temperature acidic hydrothermal device comprises astraw bin, a pulverizer, a phosphoric acid liquid storage tank, a microwave hydrothermal reaction kettle, a filter, a liquid product tank and a hydrothermal carbon storage tank. A high-temperature alkaline activation device comprises a potassium hydroxide storage tank, a first stirrer, a nitrogen cylinder, a tubular pyrolyzing furnace, a gas purification device, a gas storage tank, a hydrochloricacid tank, a clean water tank and an activated carbon storage tank. An electrode material preparation device comprises an acetylene black storage tank, an NMP storage tank, a PVDF storage tank, a second stirrer, a foamed nickel storage tank, a coater, a vacuum drier and a tablet press. By adopting the system, improvement is made on the production process of a biomass-based super-capacitor, all components of straw can be converted into clean energy and utilized, and the development and utilization of a high-performance super-capacitor can be achieved.

Description

technical field [0001] The invention relates to the technical field of supercapacitor electrode material preparation, in particular to a straw microwave hydrothermal based supercapacitor activated carbon electrode material preparation system and method. Background technique [0002] Supercapacitor is a new type of energy storage device between traditional capacitors and batteries. It has the advantages of high power density of traditional capacitors and high energy density of secondary batteries, fast charging speed, long cycle life, and no pollution to the environment. In view of its many performance advantages, supercapacitors can be widely used in the automotive industry, aerospace, national defense technology, information technology, electronics industry and other fields, and belong to the standard full range of low-carbon economic core products. Energy density and power density are the main indicators to measure the performance of supercapacitors, and the properties of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/34H01G11/44H01G11/84H01G11/86C01B32/324C01B32/348C01B32/39
CPCC01B32/324C01B32/348C01B32/39H01G11/24H01G11/34H01G11/44H01G11/84H01G11/86Y02E60/13
Inventor 牛文娟苏静赵晓磊秦千惠陈思苇刘佳政程帆万瑾赵艺李敏瑜李欢
Owner HUAZHONG AGRI UNIV
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