Microwave-Assisted Preparation of Hierarchical Porous Carbon Aerogels Derived from Food Wastes for Supercapacitors
Preparing carbon aerogel in an eco-friendly and inexpensive manner remains a significant challenge. The carbon aerogels derived from food waste (FWCAs) with a three-dimensional connected network structure are successfully synthesized using microwave radiation. The as-prepared FWCA-4 (The KOH/C ratio...
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MDPI AG
2025-03-01
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| Series: | Nanomaterials |
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| author | Zijun Dong Tong Li Xinghe Xu Yi Chen Jiemei Fu Shichang Sun |
| author_facet | Zijun Dong Tong Li Xinghe Xu Yi Chen Jiemei Fu Shichang Sun |
| author_sort | Zijun Dong |
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| description | Preparing carbon aerogel in an eco-friendly and inexpensive manner remains a significant challenge. The carbon aerogels derived from food waste (FWCAs) with a three-dimensional connected network structure are successfully synthesized using microwave radiation. The as-prepared FWCA-4 (The KOH/C ratio is 4) has a large specific surface area (1470 m<sup>2</sup>/g), pore volume (0.634 m<sup>3</sup>/g), and a high degree of graphitization. Band-like lattice stripes with a spacing of 0.34 nm, corresponding to the graphite plane, are observed. A high specific capacitance of 314 F/g at 1.0 A/g and an excellent capacitance retention (>90% after 10,000 cycles) make the FWCA-4 suitable for high-performance supercapacitor electrode materials. Furthermore, the specific surface area and pore volume of FWCA-4 are larger and the degree of graphitization is higher than in ordinary porous carbon derived from food waste (FWPC). The assembled symmetrical solid capacitor from FWCA-4 exhibits a maximum energy density of approximately 179.9 W/kg in neutral ion electrolytes. Thus, food waste is successfully used to prepare carbon aerogels through a gelation process using microwave radiation. The recycling of waste biomass is achieved, and the results provide insights for the preparation of carbon aerogels using biomass. |
| format | Article |
| id | doaj-art-a7c0b870b48c4e7f9aba0c461b8ed4b6 |
| institution | DOAJ |
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| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
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| series | Nanomaterials |
| spelling | doaj-art-a7c0b870b48c4e7f9aba0c461b8ed4b62025-08-20T02:59:00ZengMDPI AGNanomaterials2079-49912025-03-0115538710.3390/nano15050387Microwave-Assisted Preparation of Hierarchical Porous Carbon Aerogels Derived from Food Wastes for SupercapacitorsZijun Dong0Tong Li1Xinghe Xu2Yi Chen3Jiemei Fu4Shichang Sun5College of Civil and Transportation Engineering, The Underground Polis Academy, Shenzhen University, Shenzhen 518060, ChinaCollege of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, ChinaCollege of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, ChinaCollege of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, ChinaCollege of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, ChinaCollege of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, ChinaPreparing carbon aerogel in an eco-friendly and inexpensive manner remains a significant challenge. The carbon aerogels derived from food waste (FWCAs) with a three-dimensional connected network structure are successfully synthesized using microwave radiation. The as-prepared FWCA-4 (The KOH/C ratio is 4) has a large specific surface area (1470 m<sup>2</sup>/g), pore volume (0.634 m<sup>3</sup>/g), and a high degree of graphitization. Band-like lattice stripes with a spacing of 0.34 nm, corresponding to the graphite plane, are observed. A high specific capacitance of 314 F/g at 1.0 A/g and an excellent capacitance retention (>90% after 10,000 cycles) make the FWCA-4 suitable for high-performance supercapacitor electrode materials. Furthermore, the specific surface area and pore volume of FWCA-4 are larger and the degree of graphitization is higher than in ordinary porous carbon derived from food waste (FWPC). The assembled symmetrical solid capacitor from FWCA-4 exhibits a maximum energy density of approximately 179.9 W/kg in neutral ion electrolytes. Thus, food waste is successfully used to prepare carbon aerogels through a gelation process using microwave radiation. The recycling of waste biomass is achieved, and the results provide insights for the preparation of carbon aerogels using biomass.https://www.mdpi.com/2079-4991/15/5/387microwave radiationcarbon aerogelsupercapacitorfood waste |
| spellingShingle | Zijun Dong Tong Li Xinghe Xu Yi Chen Jiemei Fu Shichang Sun Microwave-Assisted Preparation of Hierarchical Porous Carbon Aerogels Derived from Food Wastes for Supercapacitors Nanomaterials microwave radiation carbon aerogel supercapacitor food waste |
| title | Microwave-Assisted Preparation of Hierarchical Porous Carbon Aerogels Derived from Food Wastes for Supercapacitors |
| title_full | Microwave-Assisted Preparation of Hierarchical Porous Carbon Aerogels Derived from Food Wastes for Supercapacitors |
| title_fullStr | Microwave-Assisted Preparation of Hierarchical Porous Carbon Aerogels Derived from Food Wastes for Supercapacitors |
| title_full_unstemmed | Microwave-Assisted Preparation of Hierarchical Porous Carbon Aerogels Derived from Food Wastes for Supercapacitors |
| title_short | Microwave-Assisted Preparation of Hierarchical Porous Carbon Aerogels Derived from Food Wastes for Supercapacitors |
| title_sort | microwave assisted preparation of hierarchical porous carbon aerogels derived from food wastes for supercapacitors |
| topic | microwave radiation carbon aerogel supercapacitor food waste |
| url | https://www.mdpi.com/2079-4991/15/5/387 |
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