Biochar obtained by carbonization of spent coffee grounds and its application in the construction of an energy storage device

Chemical Engineering Journal Advances

卷:4

Dionissios Mantzavinos¹  John Vakros²  Panagiotis Lianos³  Tatiana Santos Andrade³ 

[1] Department of Chemical Engineering, University of Patras, 26500 Patras, Greece;

[2] Corresponding authors.;

关键词: Biochar;    Spent coffee grounds;    Photocatalytic fuel cell;    Supercapacitor;   

DOI  :  

来源: DOAJ

【 摘 要 】

Biochar has been made by carbonization of spent coffee grounds without further activation and has been characterized by several techniques revealing a material with a satisfactory balance of microporosity with meso and macroporosity. The material was fairly pure with 96% of its mass made of carbon and oxygen, 2.2% of K and the rest of unidentified minerals. This biochar was used to make a supercapacitor electrode combined with a photocatalytic fuel cell as an electric power source. It has been shown that the present biochar does apply as material to make a supercapacitor with specific capacitance mounting up to 200 Fg−1. Its combination with a photocatalytic fuel cell can be designed into a very simple system which provides several functions in one single device: solar energy conversion, photocatalytic degradation of an organic substance and storing of electric energy in a supercapacitor.

【 授权许可】

Unknown