Abstract
The acceleration of urbanization has made environmental problems increasingly prominent. With the continuous increase in the volume of urban sewage discharged annually, the problem of urban sludge pollution has gradually become an environmental problem in our country. At the same time, the expansion of grid-connected new energy has also continuously raised new challenges to low-cost and high-efficiency energy storage technology. This paper uses municipal sludge to prepare low-cost supercapacitors, that is, using municipal sludge as a raw material, through a series of physical and chemical processes such as drying, doping, impregnation, and activation, to prepare carbon-based porous electrode materials that can be used for supercapacitors. On the one hand, it solves the problem of sludge disposal. On the other hand, it greatly reduces the cost of supercapacitors and provides a new idea for preparing supercapacitors.
Highlights
With the acceleration of China's urbanization process, the discharge of urban sewage and sludge is increasing year by year
The reason is that the purity of the sludge carbon source is not high and ordinary activated carbon is difficult to meet the requirements of supercapacitors
The aim is to improve the purity of activated carbon from sludge through carbon source method, and use template method to realize porous carbon-based materials, and use modification methods to improve the specific energy density of the electrode of super electrode materials
Summary
With the acceleration of China's urbanization process, the discharge of urban sewage and sludge is increasing year by year. The main disposal methods of foreign sludge include sludge landfill, incineration and reclamation. There are many domestic research methods for sludge treatment in China, including sanitary landfill, incineration, ocean dumping, anaerobic digestion, supercritical gasification, and hydrothermal treatment. The reason is that the purity of the sludge carbon source is not high and ordinary activated carbon is difficult to meet the requirements of supercapacitors. Based on this background, this paper uses sludge as a raw material to prepare super electrode materials. The aim is to improve the purity of activated carbon from sludge through carbon source (straw) method, and use template method to realize porous carbon-based materials, and use modification methods to improve the specific energy density of the electrode of super electrode materials
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