Supercapacitor Cell Performance with Bacterial Nanocellulose and Bacterial Nanocellulose/Polybenzimidazole Impregnated Membranes as Separator
Supercapacitors are advanced energy storage devices renowned for their rapid energy delivery and long operational lifespan, making them indispensable across various industries. Their relevance has grown in recent years due to the adoption of environmentally friendly materials. One such material is b...
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MDPI AG
2025-01-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/15/1/12 |
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| author | Hristo Penchev Galia Ivanova Venelin Hubenov Ivanka Boyadzieva Desislava Budurova Filip Ublekov Adriana Gigova Antonia Stoyanova |
| author_facet | Hristo Penchev Galia Ivanova Venelin Hubenov Ivanka Boyadzieva Desislava Budurova Filip Ublekov Adriana Gigova Antonia Stoyanova |
| author_sort | Hristo Penchev |
| collection | DOAJ |
| description | Supercapacitors are advanced energy storage devices renowned for their rapid energy delivery and long operational lifespan, making them indispensable across various industries. Their relevance has grown in recent years due to the adoption of environmentally friendly materials. One such material is bacterial nanocellulose (BNC), produced entirely from microbial sources, offering sustainability and a bioprocess-driven synthesis. In this study, BNC was synthesized using a symbiotic microbial community. After production and purification, pristine BNC membranes, with an average thickness of 80 microns, were impregnated with an alkali-alcohol meta-polybenzimidazole (PBI) solution. This process yielded hybrid BNC/PBI membranes with improved ion-transport properties. The BNC membranes were then doped with a 6 M KOH solution, to enhance OH<sup>−</sup> conductivity, and characterized using optical microscopy, ATR FT-IR, XRD, CVT, BET analysis, and impedance spectroscopy. Both BNC and BNC/PBI membranes were tested as separators in laboratory-scale symmetric supercapacitor cells, with performance compared to a commercial Viledon<sup>®</sup> separator. The supercapacitors employing BNC membranes exhibited high specific capacitance and excellent cycling stability, retaining performance over 10,000 charge/discharge cycles. These findings underscore the potential of BNC/KOH membranes for next-generation supercapacitor applications. |
| format | Article |
| id | doaj-art-03c2886a3ab24022bd6a325318da9c39 |
| institution | Kabale University |
| issn | 2077-0375 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj-art-03c2886a3ab24022bd6a325318da9c392025-01-24T13:41:00ZengMDPI AGMembranes2077-03752025-01-011511210.3390/membranes15010012Supercapacitor Cell Performance with Bacterial Nanocellulose and Bacterial Nanocellulose/Polybenzimidazole Impregnated Membranes as SeparatorHristo Penchev0Galia Ivanova1Venelin Hubenov2Ivanka Boyadzieva3Desislava Budurova4Filip Ublekov5Adriana Gigova6Antonia Stoyanova7Institute of Polymers, Bulgarian Academy of Sciences, “Acad. G. Bonchev” St., Bl.103A, 1113 Sofia, BulgariaInstitute of Electrochemistry and Energy Systems, Bulgarian Academy of Sciences, G. Bonchev Str. 10, 1113 Sofia, BulgariaThe Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, “Acad. G. Bonchev” St., Bl.26, 1113 Sofia, BulgariaThe Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, “Acad. G. Bonchev” St., Bl.26, 1113 Sofia, BulgariaInstitute of Polymers, Bulgarian Academy of Sciences, “Acad. G. Bonchev” St., Bl.103A, 1113 Sofia, BulgariaInstitute of Polymers, Bulgarian Academy of Sciences, “Acad. G. Bonchev” St., Bl.103A, 1113 Sofia, BulgariaInstitute of Electrochemistry and Energy Systems, Bulgarian Academy of Sciences, G. Bonchev Str. 10, 1113 Sofia, BulgariaInstitute of Electrochemistry and Energy Systems, Bulgarian Academy of Sciences, G. Bonchev Str. 10, 1113 Sofia, BulgariaSupercapacitors are advanced energy storage devices renowned for their rapid energy delivery and long operational lifespan, making them indispensable across various industries. Their relevance has grown in recent years due to the adoption of environmentally friendly materials. One such material is bacterial nanocellulose (BNC), produced entirely from microbial sources, offering sustainability and a bioprocess-driven synthesis. In this study, BNC was synthesized using a symbiotic microbial community. After production and purification, pristine BNC membranes, with an average thickness of 80 microns, were impregnated with an alkali-alcohol meta-polybenzimidazole (PBI) solution. This process yielded hybrid BNC/PBI membranes with improved ion-transport properties. The BNC membranes were then doped with a 6 M KOH solution, to enhance OH<sup>−</sup> conductivity, and characterized using optical microscopy, ATR FT-IR, XRD, CVT, BET analysis, and impedance spectroscopy. Both BNC and BNC/PBI membranes were tested as separators in laboratory-scale symmetric supercapacitor cells, with performance compared to a commercial Viledon<sup>®</sup> separator. The supercapacitors employing BNC membranes exhibited high specific capacitance and excellent cycling stability, retaining performance over 10,000 charge/discharge cycles. These findings underscore the potential of BNC/KOH membranes for next-generation supercapacitor applications.https://www.mdpi.com/2077-0375/15/1/12bacterial nanocellulosepotassium hydroxidepolybenzimidazoleimpregnationViledon<sup>®</sup>symmetric supercapacitor |
| spellingShingle | Hristo Penchev Galia Ivanova Venelin Hubenov Ivanka Boyadzieva Desislava Budurova Filip Ublekov Adriana Gigova Antonia Stoyanova Supercapacitor Cell Performance with Bacterial Nanocellulose and Bacterial Nanocellulose/Polybenzimidazole Impregnated Membranes as Separator Membranes bacterial nanocellulose potassium hydroxide polybenzimidazole impregnation Viledon<sup>®</sup> symmetric supercapacitor |
| title | Supercapacitor Cell Performance with Bacterial Nanocellulose and Bacterial Nanocellulose/Polybenzimidazole Impregnated Membranes as Separator |
| title_full | Supercapacitor Cell Performance with Bacterial Nanocellulose and Bacterial Nanocellulose/Polybenzimidazole Impregnated Membranes as Separator |
| title_fullStr | Supercapacitor Cell Performance with Bacterial Nanocellulose and Bacterial Nanocellulose/Polybenzimidazole Impregnated Membranes as Separator |
| title_full_unstemmed | Supercapacitor Cell Performance with Bacterial Nanocellulose and Bacterial Nanocellulose/Polybenzimidazole Impregnated Membranes as Separator |
| title_short | Supercapacitor Cell Performance with Bacterial Nanocellulose and Bacterial Nanocellulose/Polybenzimidazole Impregnated Membranes as Separator |
| title_sort | supercapacitor cell performance with bacterial nanocellulose and bacterial nanocellulose polybenzimidazole impregnated membranes as separator |
| topic | bacterial nanocellulose potassium hydroxide polybenzimidazole impregnation Viledon<sup>®</sup> symmetric supercapacitor |
| url | https://www.mdpi.com/2077-0375/15/1/12 |
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