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Suppressing the chromium disproportionation reaction in O3-type layered cathode materials for high capacity sodium-ion batteries
| Content Provider | United States Department of Energy Office of Scientific and Technical Information (OSTI.GOV) |
|---|---|
| Author | Cao, Ming -Hui Wang, Yong Shadike, Zulipiya Yue, Ji -Li Hu, Enyuan Bak, Seong -Min Zhou, Yong -Ning Fu, Zheng -Wen |
| Organization | Brookhaven National Laboratory (BNL), Upton, NY (United States) |
| Abstract | Chromium-based layered cathode materials suffer from the irreversible disproportionation reaction of Cr4+ to Cr3+ and Cr6+, which hinders the reversible multi-electron redox of Cr ions in layered cathodes, and limits their capacity and reversibility. To address this problem, a novel O3-type layer-structured transition metal oxide of NaCr1/3Fe1/3Mn1/3O2 (NCFM) was designed and studied as a cathode material. A high reversible capacity of 186 mA h g–1 was achieved at a current rate of 0.05C in a voltage range of 1.5 to 4.2 V. X-ray diffraction revealed an O3 → (O3 + P3) → (P3 + O3'') → O3'' phase-transition pathway for NCFM during charge. X-ray absorption, X-ray photoelectron and electron energy-loss spectroscopy measurements revealed the electronic structure changes of NCFM during Na+ deintercalation/intercalation processes. It is confirmed that the disproportionation reaction of Cr4+ to Cr3+ and Cr6+ can be effectively suppressed by Fe3+ and Mn4+ substitution. Lastly, these results demonstrated that the reversible multi-electron oxidation/reduction of Cr ions can be achieved in NCFM during charge and discharge accompanied by CrO6 octahedral distortion and recovery. |
| Sponsorship | USDOE Office of Energy Efficiency and Renewable Energy (EERE) |
| Related Links | https://www.osti.gov/biblio/1346753 |
| Starting Page | 5442 |
| Ending Page | 5448 |
| Page Count | 7 |
| File Format | |
| ISSN | 20507488 |
| DOI | 10.1039/C6TA10818K |
| Journal | Journal of Materials Chemistry. A |
| Volume Number | 5 |
| Issue Number | 11 |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Publisher Date | 2017-02-14 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | ENERGY STORAGE |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Renewable Energy, Sustainability and the Environment Materials Science |
