Abstract
Sodium-ion batteries are important alternative energy storage devices that have recently come again into focus for the development of large-scale energy storage devices because sodium is an abundant and low-cost material. However, the development of electrode materials with long-term stability has remained a great challenge. A novel negative-electrode material, a P2-type layered oxide with the chemical composition Na<sub>2/3</sub>Co<sub>1/3</sub>Ti <sub>2/3</sub>O<sub>2</sub>, exhibits outstanding cycle stability (ca. 84.84% capacity retention for 3000 cycles, very small decrease in the volume (0.046%) after 500 cycles), good rate capability (ca. 41% capacity retention at a discharge/charge rate of 10C), and a usable reversible capacity of about 90 mAhg<sup>-1</sup> with a safe average storage voltage of approximately 0.7 V in the sodium half-cell. This P2-type layered oxide is a promising anode material for sodium-ion batteries with a long cycle life and should greatly promote the development of room-temperature sodium-ion batteries. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
| Original language | English |
|---|---|
| Pages (from-to) | 8963-8969 |
| Journal | Angewandte Chemie - International Edition |
| Volume | 53 |
| Issue number | 34 |
| DOIs | |
| Publication status | Published - 18 Aug 2014 |
| Externally published | Yes |
Bibliographical note
Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].Research Keywords
- anode materials
- electrochemistry
- sodium storage
- sodium-ion batteries
