Sc-substituted Nasicon solid electrolyte for an all-solid-state NaxCoO2/Nasicon/Na sodium model battery with stable electrochemical performance
| Autor: | Philipp Komissinskiy, Qianli Ma, René Hausbrand, Philipp Kehne, Conrad Guhl, Frank Tietz, Lambert Alff |
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| Rok vydání: | 2019 |
| Předmět: |
Battery (electricity)
Materials science Renewable Energy Sustainability and the Environment Sodium Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Electrolyte Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Dielectric spectroscopy Chemical engineering chemistry Fast ion conductor Ionic conductivity Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Power Sources. 409:86-93 |
| ISSN: | 0378-7753 |
| Popis: | All-solid-state sodium batteries are attractive due to the abundance of sodium and advantageous for safe battery operation by avoiding flammable organics and liquids and suppressed dendrite formation. Currently, the lack of a chemically stable sodium solid electrolyte with high ion conductivity at room temperature is one of the challenges for future development of sodium batteries. Herein, we present a NaxCoO2/Nasicon/Na thin-film model sodium solid-state battery using a Sc-substituted Nasicon solid electrolyte with a high ionic conductivity of 4 × 10−3 S cm−1. The battery shows a high specific capacity of 150 mAh g−1 at room-temperature and discharge rates of up to 6C. Excellent chemical stability of this solid electrolyte at high voltages of up to 4.2 V increases the accessible sodium (de)intercalation range and battery capacity. Direct extraction of the interface resistances between the electrode materials of the thin-film model cell using electrochemical impedance spectroscopy gives a unique opportunity of correlation the electrochemical performance with properties of electrode materials and their interfaces. |
| Databáze: | OpenAIRE |
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