Lignin-Derived Activated Carbon as Electrode Material for High-Performance Supercapacitor
Utilizing lignin-derived activated carbon in supercapacitors has emerged as a promising approach to alleviating environmental pollution and promoting the high-value utilization of byproducts in the papermaking industry. In this study, activated carbons (LACs) were prepared using a simple one-step KO...
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MDPI AG
2024-12-01
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| author | Chenghao Pan Yongfeng Ji Suxia Ren Tingzhou Lei Lili Dong |
| author_facet | Chenghao Pan Yongfeng Ji Suxia Ren Tingzhou Lei Lili Dong |
| author_sort | Chenghao Pan |
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| description | Utilizing lignin-derived activated carbon in supercapacitors has emerged as a promising approach to alleviating environmental pollution and promoting the high-value utilization of byproducts in the papermaking industry. In this study, activated carbons (LACs) were prepared using a simple one-step KOH activation approach and by employing enzymatic hydrolysis lignin (EHL). The impact of the KOH activation parameters on the microstructure and capacitive performance of the LACs was investigated by varying the KOH/EHL ratio and activation temperature. The optimized sample LAC<sub>800-4</sub> showed an interconnected porous structure with a high surface area of 2285 m<sup>2</sup>/g, abundant micropores, and a small number of mesopores, which makes it a suitable electrode material for supercapacitors. The sample LAC<sub>800-4</sub> demonstrated a high specific capacitance of 291.3 F/g in a three-electrode system. Under a symmetrical supercapacitor electrode system, the specific capacitance of the LAC<sub>800-4</sub> electrode reached 186.8 F/g at 0.5 A/g. After 10,000 cycles at 20 A/g, the capacitance retention rate remained at 96.1%. The symmetrical supercapacitor also demonstrated a superior energy density of 6.5 Wh/kg. This work provides valuable insights into the transformation of low-value natural biomass derivatives into environmentally friendly, high-performing supercapacitor electrode materials. |
| format | Article |
| id | doaj-art-9076cac142614030bb5c31a9400a2eed |
| institution | Kabale University |
| issn | 1420-3049 |
| language | English |
| publishDate | 2024-12-01 |
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| series | Molecules |
| spelling | doaj-art-9076cac142614030bb5c31a9400a2eed2025-02-03T14:26:17ZengMDPI AGMolecules1420-30492024-12-013018910.3390/molecules30010089Lignin-Derived Activated Carbon as Electrode Material for High-Performance SupercapacitorChenghao Pan0Yongfeng Ji1Suxia Ren2Tingzhou Lei3Lili Dong4School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, ChinaInstitute of Urban & Rural Mining, Changzhou University, Changzhou 213164, ChinaInstitute of Urban & Rural Mining, Changzhou University, Changzhou 213164, ChinaInstitute of Urban & Rural Mining, Changzhou University, Changzhou 213164, ChinaInstitute of Urban & Rural Mining, Changzhou University, Changzhou 213164, ChinaUtilizing lignin-derived activated carbon in supercapacitors has emerged as a promising approach to alleviating environmental pollution and promoting the high-value utilization of byproducts in the papermaking industry. In this study, activated carbons (LACs) were prepared using a simple one-step KOH activation approach and by employing enzymatic hydrolysis lignin (EHL). The impact of the KOH activation parameters on the microstructure and capacitive performance of the LACs was investigated by varying the KOH/EHL ratio and activation temperature. The optimized sample LAC<sub>800-4</sub> showed an interconnected porous structure with a high surface area of 2285 m<sup>2</sup>/g, abundant micropores, and a small number of mesopores, which makes it a suitable electrode material for supercapacitors. The sample LAC<sub>800-4</sub> demonstrated a high specific capacitance of 291.3 F/g in a three-electrode system. Under a symmetrical supercapacitor electrode system, the specific capacitance of the LAC<sub>800-4</sub> electrode reached 186.8 F/g at 0.5 A/g. After 10,000 cycles at 20 A/g, the capacitance retention rate remained at 96.1%. The symmetrical supercapacitor also demonstrated a superior energy density of 6.5 Wh/kg. This work provides valuable insights into the transformation of low-value natural biomass derivatives into environmentally friendly, high-performing supercapacitor electrode materials.https://www.mdpi.com/1420-3049/30/1/89ligninactivated carbonKOH activationsupercapacitors |
| spellingShingle | Chenghao Pan Yongfeng Ji Suxia Ren Tingzhou Lei Lili Dong Lignin-Derived Activated Carbon as Electrode Material for High-Performance Supercapacitor Molecules lignin activated carbon KOH activation supercapacitors |
| title | Lignin-Derived Activated Carbon as Electrode Material for High-Performance Supercapacitor |
| title_full | Lignin-Derived Activated Carbon as Electrode Material for High-Performance Supercapacitor |
| title_fullStr | Lignin-Derived Activated Carbon as Electrode Material for High-Performance Supercapacitor |
| title_full_unstemmed | Lignin-Derived Activated Carbon as Electrode Material for High-Performance Supercapacitor |
| title_short | Lignin-Derived Activated Carbon as Electrode Material for High-Performance Supercapacitor |
| title_sort | lignin derived activated carbon as electrode material for high performance supercapacitor |
| topic | lignin activated carbon KOH activation supercapacitors |
| url | https://www.mdpi.com/1420-3049/30/1/89 |
| work_keys_str_mv | AT chenghaopan ligninderivedactivatedcarbonaselectrodematerialforhighperformancesupercapacitor AT yongfengji ligninderivedactivatedcarbonaselectrodematerialforhighperformancesupercapacitor AT suxiaren ligninderivedactivatedcarbonaselectrodematerialforhighperformancesupercapacitor AT tingzhoulei ligninderivedactivatedcarbonaselectrodematerialforhighperformancesupercapacitor AT lilidong ligninderivedactivatedcarbonaselectrodematerialforhighperformancesupercapacitor |