A Plastic–Crystal Electrolyte Interphase for All‐Solid‐State Sodium Batteries
The development of all‐solid‐state rechargeable batteries is plagued by a large interfacial resistance between a solid cathode and a solid electrolyte that increases with each charge–discharge cycle. The introduction of a plastic–crystal electrolyte interphase between a solid electrolyte and solid c...
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Veröffentlicht in: | Angewandte Chemie (International ed.) 2017-05, Vol.56 (20), p.5541-5545 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The development of all‐solid‐state rechargeable batteries is plagued by a large interfacial resistance between a solid cathode and a solid electrolyte that increases with each charge–discharge cycle. The introduction of a plastic–crystal electrolyte interphase between a solid electrolyte and solid cathode particles reduces the interfacial resistance, increases the cycle life, and allows a high rate performance. Comparison of solid‐state sodium cells with 1) solid electrolyte Na3Zr2(Si2PO4) particles versus 2) plastic–crystal electrolyte in the cathode composites shows that the former suffers from a huge irreversible capacity loss on cycling whereas the latter exhibits a dramatically improved electrochemical performance with retention of capacity for over 100 cycles and cycling at 5 C rate. The application of a plastic–crystal electrolyte interphase between a solid electrolyte and a solid cathode may be extended to other all‐solid‐state battery cells.
Set interphase to stun: The cathode interfacial resistance in an all‐solid‐state sodium battery is dramatically reduced by application of a plastic–crystal electrolyte interphase between the cathode particles and the solid electrolyte. A solid‐state sodium battery with the plastic–crystal electrolyte in the cathode exhibits a stable cycle performance and an excellent rate capability. |
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ISSN: | 1433-7851 1521-3773 |
DOI: | 10.1002/anie.201702003 |