Method for preparing porous carbon material by direct carbonization of waste mineral water bottles and electrochemical application thereof

Abstract

The invention discloses a method for preparing a porous carbon material by direct carbonization of waste mineral water bottles and an electrochemical application thereof. The method comprises the following steps: putting a proper amount of mineral water bottle clippings into a tube furnace, heating in the nitrogen atmosphere at the heating rate of 3 DEG C min<-1>, and keeping constant at a high temperature (2M NaOH is used, in the technology, as an exhaust gas absorption liquid to absorb acid gas generated by high temperature carbonization of waste plastic); washing a black solid product obtained in the above step by the use of 1M-2M hydrochloric acid so as to remove inorganic ash; washing with deionized water to the neutral level, and drying to obtain the porous carbon material. According to the method, BET specific surface area reaches 716 m<2>g<-1>. When electric current density is 2 Gg<-1>, charge and discharge circulate for 5000 times, and capacitance retention rate is 91.67%. The technical researches on reutilization of wastes are effectively conducted. The method has good economic and social benefits as well as a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, in particular to a method for preparing porous carbon materials by direct carbonization of waste mineral water bottles and its electrochemical application. Background technique [0002] With the further development of society, human beings have higher and higher demand for energy supply, and they are more pursuing efficient and environmentally friendly green energy. Supercapacitor, also known as electrochemical capacitor, is a new type of energy storage device between traditional batteries and capacitors. Supercapacitors have high specific power (greater than 1kW / kg, even tens of kilowatts per kilogram), long life (more than 100,000 times), wide operating temperature (-40℃~60℃) and fast charging (less than 3min), etc. Excellent characteristics make it widely used in aerospace, national defense technology, mobile communication and modern transportation. At present, the preparation metho...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a porous carbon material prepared by direct carbonization of waste mineral water bottles and its preparation method, aiming at solving the problem of other dyes and additives commonly used in the production process of mineral water bottles, such as plasticizers and heat stabilizers.

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