Honeycomb-like Hierarchical Porous Carbon from Lignosulphonate by Enzymatic Hydrolysis and Alkali Activation for High-Performance Supercapacitors
Porous carbon materials (PCs) were prepared via hydrothermal carbonization from calcium lignosulfonate (CL) based on enzymatic hydrolysis and alkali activation. The effects of enzymatic hydrolysis and different KOH feeding ratios on the structure and electrochemical properties of enzymatic hydrolysi...
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MDPI AG
2023-04-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/9/3824 |
| _version_ | 1827743029319958528 |
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| author | Xin Zhang Shi Liu Yuqi Zhao Haicun Yang Jinchun Li |
| author_facet | Xin Zhang Shi Liu Yuqi Zhao Haicun Yang Jinchun Li |
| author_sort | Xin Zhang |
| collection | DOAJ |
| description | Porous carbon materials (PCs) were prepared via hydrothermal carbonization from calcium lignosulfonate (CL) based on enzymatic hydrolysis and alkali activation. The effects of enzymatic hydrolysis and different KOH feeding ratios on the structure and electrochemical properties of enzymatic hydrolysis CL (EHCL)-derived PCs were evaluated in detail. The results showed that the EHCL-derived PCs showed a higher SSA than that of CL. When the mass ratio of KOH/EHCL was 3/2, the PCs exhibited a honeycomb-like microscopic morphology with a specific surface area of up to 1771 m<sup>2</sup>/g and a 3D hierarchical porous structure composed of abundant micropores, mesopores, and macropores. As an electrode in a supercapacitor, the highest specific capacitance was 147 F/g at a current density of 0.25 A/g, and it maintained 78% of the initial value at a high current density of 10 A/g. The excellent electrochemical cycle and structural stability were confirmed on the condition of a higher capacitance retention of 95.2% after 5000 times of galvanostatic charge/discharge. This work provides a potential application of CL in high-performance supercapacitors. |
| first_indexed | 2024-03-11T04:20:14Z |
| format | Article |
| id | doaj.art-81831650ea3b4da5894b2c8d93358d07 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T04:20:14Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-81831650ea3b4da5894b2c8d93358d072023-11-17T22:52:15ZengMDPI AGEnergies1996-10732023-04-01169382410.3390/en16093824Honeycomb-like Hierarchical Porous Carbon from Lignosulphonate by Enzymatic Hydrolysis and Alkali Activation for High-Performance SupercapacitorsXin Zhang0Shi Liu1Yuqi Zhao2Haicun Yang3Jinchun Li4School of Materials Science and Engineering, Changzhou University, Changzhou 213164, ChinaSchool of Materials Science and Engineering, Changzhou University, Changzhou 213164, ChinaSchool of Materials Science and Engineering, Changzhou University, Changzhou 213164, ChinaSchool of Materials Science and Engineering, Changzhou University, Changzhou 213164, ChinaSchool of Materials Science and Engineering, Changzhou University, Changzhou 213164, ChinaPorous carbon materials (PCs) were prepared via hydrothermal carbonization from calcium lignosulfonate (CL) based on enzymatic hydrolysis and alkali activation. The effects of enzymatic hydrolysis and different KOH feeding ratios on the structure and electrochemical properties of enzymatic hydrolysis CL (EHCL)-derived PCs were evaluated in detail. The results showed that the EHCL-derived PCs showed a higher SSA than that of CL. When the mass ratio of KOH/EHCL was 3/2, the PCs exhibited a honeycomb-like microscopic morphology with a specific surface area of up to 1771 m<sup>2</sup>/g and a 3D hierarchical porous structure composed of abundant micropores, mesopores, and macropores. As an electrode in a supercapacitor, the highest specific capacitance was 147 F/g at a current density of 0.25 A/g, and it maintained 78% of the initial value at a high current density of 10 A/g. The excellent electrochemical cycle and structural stability were confirmed on the condition of a higher capacitance retention of 95.2% after 5000 times of galvanostatic charge/discharge. This work provides a potential application of CL in high-performance supercapacitors.https://www.mdpi.com/1996-1073/16/9/3824calcium lignosulfonateenzymatic hydrolysisalkali activationhierarchical porositysupercapacitors |
| spellingShingle | Xin Zhang Shi Liu Yuqi Zhao Haicun Yang Jinchun Li Honeycomb-like Hierarchical Porous Carbon from Lignosulphonate by Enzymatic Hydrolysis and Alkali Activation for High-Performance Supercapacitors Energies calcium lignosulfonate enzymatic hydrolysis alkali activation hierarchical porosity supercapacitors |
| title | Honeycomb-like Hierarchical Porous Carbon from Lignosulphonate by Enzymatic Hydrolysis and Alkali Activation for High-Performance Supercapacitors |
| title_full | Honeycomb-like Hierarchical Porous Carbon from Lignosulphonate by Enzymatic Hydrolysis and Alkali Activation for High-Performance Supercapacitors |
| title_fullStr | Honeycomb-like Hierarchical Porous Carbon from Lignosulphonate by Enzymatic Hydrolysis and Alkali Activation for High-Performance Supercapacitors |
| title_full_unstemmed | Honeycomb-like Hierarchical Porous Carbon from Lignosulphonate by Enzymatic Hydrolysis and Alkali Activation for High-Performance Supercapacitors |
| title_short | Honeycomb-like Hierarchical Porous Carbon from Lignosulphonate by Enzymatic Hydrolysis and Alkali Activation for High-Performance Supercapacitors |
| title_sort | honeycomb like hierarchical porous carbon from lignosulphonate by enzymatic hydrolysis and alkali activation for high performance supercapacitors |
| topic | calcium lignosulfonate enzymatic hydrolysis alkali activation hierarchical porosity supercapacitors |
| url | https://www.mdpi.com/1996-1073/16/9/3824 |
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