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High Capacity O3-Type Na[Li0.05(Ni0.25Fe0.25Mn0.5)0.95]O2 Cathode for Sodium Ion Batteries
- Source :
- Chemistry of Materials. 26:6165-6171
- Publication Year :
- 2014
- Publisher :
- American Chemical Society (ACS), 2014.
-
Abstract
- In this work we report Na[Li0.05(Ni0.25Fe0.25Mn0.5)0.95]O2 layered cathode materials that were synthesized via a coprecipitation method. The Na[Li0.05(Ni0.25Fe0.25Mn0.5)0.95]O2 electrode exhibited an exceptionally high capacity (180.1 mA h g–1 at 0.1 C-rate) as well as excellent capacity retentions (0.2 C-rate: 89.6%, 0.5 C-rate: 92.1%) and rate capabilities at various C-rates (0.1 C-rate: 180.1 mA h g–1, 1 C-rate: 130.9 mA h g–1, 5 C-rate: 96.2 mA h g–1), which were achieved due to the Li supporting structural stabilization by introduction into the transition metal layer. By contrast, the electrode performance of the lithium-free Na[Ni0.25Fe0.25Mn0.5]O2 cathode was inferior because of structural disintegration presumably resulting from Fe3+ migration from the transition metal layer to the Na layer during cycling. The long-term cycling using a full cell consisting of a Na[Li0.05(Ni0.25Fe0.25Mn0.5)0.95]O2 cathode was coupled with a hard carbon anode which exhibited promising cycling data including a 76% ca...
Details
- ISSN :
- 15205002 and 08974756
- Volume :
- 26
- Database :
- OpenAIRE
- Journal :
- Chemistry of Materials
- Accession number :
- edsair.doi...........9703ea616c6ad763476794885c9d648d