Method for fabricating supercapacitor by taking celery as electrode raw material
A technology for supercapacitors and electrode materials, applied in the manufacture of hybrid/electric double layer capacitors, electrodes of hybrid capacitors, etc.
Inactive Publication Date: 2019-04-16
HUNAN UNIV
View PDF5 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] However, so far, there have been no reports at home and abroad that using biomass as raw material, combined with vacuum freeze-drying and carbonization methods, without adopting other complicated methods such as activation and doping, can obtain such a supercapacitor electrode material with excellent performance.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0041] First wash the celery with deionized water and cut it into small strips; then use liquid nitrogen to quickly freeze the small strips of celery; then put the frozen celery in a vacuum freeze dryer at a temperature of -40 to -60 ℃, freeze-drying under the condition of 0.5-10Pa for 24-72 hours, the room temperature is 5-15 ℃ in the early stage, and 25-30 ℃ in the later stage. In the last 4 hours, the sample is irradiated with infrared light to make the sample temperature reach 30-35 ℃, and the sample is frozen. After drying, the air pressure in the drying oven was restored to atmospheric pressure, and the sample was taken out; then the freeze-dried celery was placed in a tube furnace, and in a protective atmosphere of Ar (20-1000 sccm), the furnace was set at a speed of 2-15°C / min. Heating rate to 600-1000°C, constant temperature 0.2-5h, after the furnace cools down to room temperature, take out the sample, that is the graphitized porous carbon material with multi-level por...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| specific surface area | aaaaa | aaaaa |
| pore size | aaaaa | aaaaa |
Login to View More
Abstract
The invention belongs to the field of supercapacitor fabrication, and particularly relates to a method for fabricating a supercapacitor by taking celery as an electrode raw material. The method comprises the steps of firstly, cleaning the celery with deionized water; secondly, placing the celery in a vacuum freezing drying machine for freezing; thirdly, performing high-temperature carbonization onthe dried celery in inert protective gas to obtain graphite porous carbon as an electrode; and finally, filling a gel electrolyte, and coating the gel electrolyte between two electrodes to further assemble the supercapacitor. According to the method, low-cost biomass material celery is used as the raw material, the advantage of a biological cell structure is fully developed, the original structure is protected by freezing and drying, the graphite porous carbon material with multi-stage porosity distribution is prepared by carbonization, the recycling, regeneration and low cost of the raw material of the supercapacitor are achieved when the graphite porous carbon material is used as a supercapacitor electrode, the preparation process is simple and convenient, and the obtained supercapacitor has favorable performance and favorable application prospect.
Description
technical field [0001] The invention belongs to the field of supercapacitor preparation, in particular to a method for preparing supercapacitor electrodes using celery as a raw material. Background technique [0002] Supercapacitors occupy an irreplaceable position in the field of energy storage due to their large capacity, high power density, and good cycle stability. However, the performance of supercapacitors mainly depends on whether their electrode materials have large specific surface area, high electrical conductivity, good stability, and strong reactivity. At present, most studies use metal compounds (such as RuO 2 , Fe 3 o 4 or MoS 2 ) [1-2] ,Conductive polymers [3] , carbon nanomaterials (such as carbon nanotubes [4] ,Graphene [5] , porous carbon [6] ) and their complexes [7] As an electrode material, its raw material is usually non-renewable, the preparation process is complicated, and the cost is high. [0003] Biomass is low-cost, environmentally frie...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/44H01G11/86
CPCH01G11/44H01G11/86Y02E60/13
Inventor 陈旭丽马英英田金勇
Owner HUNAN UNIV