Mitigating the Large‐Volume Phase Transition of P2‐Type Cathodes by Synergetic Effect of Multiple Ions for Improved Sodium‐Ion Batteries
Xi'an Jiaotong University · Chinese Academy of Sciences · +3 more institutions
Abstract
Abstract Layered transition metal oxide P2‐Na 2/3 Ni 1/3 Mn 2/3 O 2 usually suffers from large‐volume phase transitions and different Na‐vacancy ordering during sodium (de)intercalation, incurring rapid capacity decline and poor rate capability. Herein, an effective strategy based on synergetic effect of selected multiple metal ions is designed for P2‐type cathodes with improved performance. The role of tetravalent titanium provides high redox potential, inactive divalent magnesium stabilizes the structure, and the monovalent lithium smooths the electrochemical curves. The combined analysis of in operando X‐ray diffraction, in operando X‐ray absorption spectroscopy and density functional theory calculations…
Citation impact
- FWCI
- 22.25
- Percentile
- 100%
- References
- 55
Authors
14- ZCZhiwei Cheng
Xi'an Jiaotong University
- BZBin Zhao
Xi'an Jiaotong University
- YGYu‐Jie GuoCorresponding
Chinese Academy of Sciences, Beijing National Laboratory for Molecular Sciences, University of Chinese Academy of Sciences
- YGYu‐Jie Guo
Chinese Academy of Sciences, Beijing National Laboratory for Molecular Sciences, University of Chinese Academy of Sciences, Beijing University of Chemical Technology
- LYLianzheng Yu
Beijing University of Chemical Technology, Xi'an Jiaotong University
Topics & keywords
- Materials science
- Cathode
- Intercalation (chemistry)
- Electrochemistry
- Anode
- Transition metal
- Chemical engineering
- Lithium (medication)
- Affordable and clean energy