Rechargeable Calcium-Sulfur Batteries Enabled by an Efficient Borate-Based Electrolyte
| Autor: | Li, Zhenyou, Vinayan, Bhaghavathi Parambath, Diemant, Thomas, Behm, Rolf Jürgen, Fichtner, Maximilian, Zhao‐Karger, Zhirong |
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| Rok vydání: | 2020 |
| Předmět: |
Battery (electricity)
DDC 540 / Chemistry & allied sciences Technology Materials science Sulfide Inorganic chemistry chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry Electrochemistry 7. Clean energy 01 natural sciences Redox Biomaterials rechargeable calcium–sulfur batteries chemistry.chemical_compound General Materials Science Anodes Polysulfide chemistry.chemical_classification General Chemistry 021001 nanoscience & nanotechnology Sulfur fluorinated borate electrolytes 0104 chemical sciences Anode chemistry ddc:540 Akkumulator calcium anodes 0210 nano-technology ddc:600 Biotechnology |
| Zdroj: | Small, 16 (39), Art.-Nr.: 2001806 Small |
| ISSN: | 1613-6829 1613-6810 |
| Popis: | echargeable metal–sulfur batteries show great promise for energy storage applications because of their potentially high energy and low cost. The multivalent-metal based electrochemical system exhibits the particular advantage of the feasibility of dendrite-free metal anode. Calcium (Ca) represents a promising anode material owing to the low reductive potential, high capacity, and abundant natural resources. However, calcium–sulfur (Ca–S) battery technology is in an early R&D stage, facing the fundamental challenge to develop a suitable electrolyte enabling reversible electrochemical Ca deposition, and at the same time, sulfur redox reactions in the system. Herein, a study of a room-temperature Ca–S battery by employing a stable and efficient calcium tetrakis(hexafluoroisopropyloxy) borate Ca[B(hfip)4]2 electrolyte is presented. The Ca–S batteries exhibit a cell voltage of ≈2.1 V (close to its thermodynamic value) and good reversibility. The mechanistic studies hint at a redox chemistry of sulfur with polysulfide/sulfide species involved in the Ca-based system. publishedVersion |
| Databáze: | OpenAIRE |
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