Redox-Active Phenanthrenequinone Triangles in Aqueous Rechargeable Zinc Batteries
| Autor: | Yassine Beldjoudi, Tae-woo Kwon, Kwan Woo Nam, Heejin Kim, J. Fraser Stoddart, Dong Jun Kim |
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| Rok vydání: | 2020 |
| Předmět: |
Battery (electricity)
Aqueous solution Solvation chemistry.chemical_element General Chemistry Zinc Electrolyte 010402 general chemistry 01 natural sciences Biochemistry Catalysis Energy storage Cathode 0104 chemical sciences law.invention Colloid and Surface Chemistry chemistry Chemical engineering law Dissolution |
| Zdroj: | Journal of the American Chemical Society. 142:2541-2548 |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/jacs.9b12436 |
| Popis: | Aqueous rechargeable zinc batteries (ZBs) have received considerable attention recently for large-scale energy storage systems in terms of rate performance, cost, and safety. Nevertheless, these ZBs still remain a subject for investigation, as researchers search for cathode materials enabling high performance. Among the various candidate cathode materials for ZBs, quinone compounds stand out as candidates because of their high specific capacity, sustainability, and low cost. Quinone-based cathodes, however, suffer from the critical limitation of undergoing dissolution during battery cycling, leading to a deterioration in battery life. To address this problem, we have introduced a redox-active triangular phenanthrenequinone-based macrocycle (PQ-Δ) with a rigid geometry and layered superstructure. Notably, we have confirmed that Zn2+ ions, together with H2O molecules, can be inserted into the PQ-Δ organic cathode, and, as a consequence, the interfacial resistance between the cathode and electrolytes is decreased effectively. Density functional theory calculations have revealed that the low interfacial resistance can be attributed mainly to decreasing the desolvation energy penalty as a result of the insertion of hydrated Zn2+ ions in the PQ-Δ cathode. The combined effects of the insertion of hydrated Zn2+ ions and the robust triangular structure of PQ-Δ serve to achieve a large reversible capacity of 210 mAh g-1 at a high current density of 150 mA g-1, along with an excellent cycle-life, that is, 99.9% retention after 500 cycles. These findings suggest that the utilization of electron-active organic macrocycles, combined with the low interfacial resistance associated with the solvation of divalent carrier ions, is essential for the overall performance of divalent battery systems. |
| Databáze: | OpenAIRE |
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