Highly stable Na-storage performance of Na 0.5 Mn 0.5 Ti 0.5 O 2 microrods as cathode for aqueous sodium-ion batteries
| Autor: | Wanfeng Li, Xingde Xiang, Molong Sun, Fang Zhang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Reaction mechanism
Aqueous solution Scanning electron microscope General Chemical Engineering Sodium Extraction (chemistry) chemistry.chemical_element Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Cathode 0104 chemical sciences Analytical Chemistry law.invention chemistry Chemical engineering law 0210 nano-technology Current density |
| Zdroj: | Journal of Electroanalytical Chemistry. 802:22-26 |
| ISSN: | 1572-6657 |
| DOI: | 10.1016/j.jelechem.2017.08.042 |
| Popis: | Tunnel-structured Na 0.5 Mn 0.5 Ti 0.5 O 2 has been synthesized with a simple solid-phase reaction route as highly stable Na-storage cathode for aqueous sodium-ion batteries (SIBs). Combined chracterizations of X-ray diffraction, scanning electron microscope and electrochemical measurements reveal that the material is mainly composed of rod-shaped particles with a diameter of 500 nm and a length of ~ 5 μm. During Na extraction/insertion process, it undergoes a single-phase reaction mechanism in the potential range of 0–1.0 V( vs Ag/AgCl), showing a reversible capacity of 46 mAh g − 1 at a current density of 30 mA g − 1 and an average operating potential of 0.41 V. In particular, excellent cycling performance is achieved owing to the favorable tunnel channel and robust structural framework, with a capacity retention of 95% after 100 cycles. The finding in this study demonstrates application potential of the Na 0.5 Mn 0.5 Ti 0.5 O 2 material as cathode for low-cost, long-cycling aqueous SIBs. |
| Databáze: | OpenAIRE |
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