Key to High Performance Ion Hybrid Capacitor: Weakly Solvated Zinc Cations
Abstract Zinc ion hybrid capacitors suffer from lack of reversibility and dendrite formation. An electrolyte, based on a solution of a zinc salt in acetonitrile and tetramethylene sulfone, allows smooth zinc deposition with high coulombic efficiency in a Zn||stainless steel cell (99.6% for 2880 cycl...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2024-01-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202305532 |
| _version_ | 1827378641619648512 |
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| author | Peng Chen Xiaohan Sun Bernd Plietker Michael Ruck |
| author_facet | Peng Chen Xiaohan Sun Bernd Plietker Michael Ruck |
| author_sort | Peng Chen |
| collection | DOAJ |
| description | Abstract Zinc ion hybrid capacitors suffer from lack of reversibility and dendrite formation. An electrolyte, based on a solution of a zinc salt in acetonitrile and tetramethylene sulfone, allows smooth zinc deposition with high coulombic efficiency in a Zn||stainless steel cell (99.6% for 2880 cycles at 1.0 mA cm−2, 1.0 mAh cm−2). A Zn||Zn cell operates stably for at least 7940 h at 1.0 mA cm−2 with an area capacity of 10 mAh cm−2, or 648 h at 90% depth of discharge and 1 mA cm−2, 9.0 mAh cm−2. Molecular dynamics simulations reveal the reason for the excellent reversibility: The zinc cation is only weakly solvated than in pure tetramethylene sulfone with the closest atoms at 3.3 to 3.8 Å. With this electrolyte, a zinc||activated‐carbon hybrid capacitor exhibits an operating voltage of 2.0 to 2.5 V, an energy‐density of 135 Wh kg−1 and a power‐density of 613 W kg−1 at 0.5 A g−1. At the very high current‐density of 15 A g−1, 29.3 Wh kg−1 and 14 250 W kg−1 are achieved with 81.2% capacity retention over 9000 cycles. |
| first_indexed | 2024-03-08T12:59:55Z |
| format | Article |
| id | doaj.art-01edae34f90649899726c25863d8b64d |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-03-08T12:59:55Z |
| publishDate | 2024-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-01edae34f90649899726c25863d8b64d2024-01-19T09:27:54ZengWileyAdvanced Science2198-38442024-01-01113n/an/a10.1002/advs.202305532Key to High Performance Ion Hybrid Capacitor: Weakly Solvated Zinc CationsPeng Chen0Xiaohan Sun1Bernd Plietker2Michael Ruck3Faculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden GermanyFaculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden GermanyFaculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden GermanyFaculty of Chemistry and Food Chemistry Technische Universität Dresden 01062 Dresden GermanyAbstract Zinc ion hybrid capacitors suffer from lack of reversibility and dendrite formation. An electrolyte, based on a solution of a zinc salt in acetonitrile and tetramethylene sulfone, allows smooth zinc deposition with high coulombic efficiency in a Zn||stainless steel cell (99.6% for 2880 cycles at 1.0 mA cm−2, 1.0 mAh cm−2). A Zn||Zn cell operates stably for at least 7940 h at 1.0 mA cm−2 with an area capacity of 10 mAh cm−2, or 648 h at 90% depth of discharge and 1 mA cm−2, 9.0 mAh cm−2. Molecular dynamics simulations reveal the reason for the excellent reversibility: The zinc cation is only weakly solvated than in pure tetramethylene sulfone with the closest atoms at 3.3 to 3.8 Å. With this electrolyte, a zinc||activated‐carbon hybrid capacitor exhibits an operating voltage of 2.0 to 2.5 V, an energy‐density of 135 Wh kg−1 and a power‐density of 613 W kg−1 at 0.5 A g−1. At the very high current‐density of 15 A g−1, 29.3 Wh kg−1 and 14 250 W kg−1 are achieved with 81.2% capacity retention over 9000 cycles.https://doi.org/10.1002/advs.202305532capacitorscoulombic efficiencyelectrolytessolvent effectzinc |
| spellingShingle | Peng Chen Xiaohan Sun Bernd Plietker Michael Ruck Key to High Performance Ion Hybrid Capacitor: Weakly Solvated Zinc Cations Advanced Science capacitors coulombic efficiency electrolytes solvent effect zinc |
| title | Key to High Performance Ion Hybrid Capacitor: Weakly Solvated Zinc Cations |
| title_full | Key to High Performance Ion Hybrid Capacitor: Weakly Solvated Zinc Cations |
| title_fullStr | Key to High Performance Ion Hybrid Capacitor: Weakly Solvated Zinc Cations |
| title_full_unstemmed | Key to High Performance Ion Hybrid Capacitor: Weakly Solvated Zinc Cations |
| title_short | Key to High Performance Ion Hybrid Capacitor: Weakly Solvated Zinc Cations |
| title_sort | key to high performance ion hybrid capacitor weakly solvated zinc cations |
| topic | capacitors coulombic efficiency electrolytes solvent effect zinc |
| url | https://doi.org/10.1002/advs.202305532 |
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