Dual‐Pillar Effect in P2‐Type Na 0.67 Ni 0.33 Mn 0.67 O 2 Through Na Site Substitution Achieve Superior Electrochemical and Air/Water Dual‐Stability as Cathode for Sodium‐Ion Batteries
University of Science and Technology of China · Hefei National Center for Physical Sciences at Nanoscale · +2 more institutions
Abstract
Abstract High‐voltage phase changes limit the capacity and cycle stability of P2‐type sodium‐layered transition metal oxides. In this study, Cu, Zn, and Mg ions are successfully co‐doped into Na 0.67 Ni 0.33 Mn 0.67 O 2 to restrain the phase transition and increase Na + diffusion with enhanced structural stability. In situ and ex situ evaluations elucidate the structural and charge compensation during high‐voltage operation. Remarkably, the resultant Na 0.76 Ni 0.23 Cu 0.07 Zn 0.03 Mn 0.62 Mg 0.05 O 2 (NNCZMMO) cathode exhibits superior rate capability (135 and 94.0 mA h g −1 at 0.1C and 5C), prolonged‐cycling stability (85.4% capacity retention over 1000 cycles at 5C) and excellent air/water stability over 40…
Citation impact
- FWCI
- 32.96
- Percentile
- 100%
- References
- 64
Authors
11- NANazir Ahmad
University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale
- LYLai Yu
University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale
- MUM. U. Muzaffar
University of Science and Technology of China, Quantum Design (Germany)
- BPBo Peng
Anhui University of Technology
- ZTZongzhi Tao
University of Science and Technology of China, Hefei National Center for Physical Sciences at Nanoscale
Topics & keywords
- Materials science
- Electrochemistry
- Pillar
- Substitution (logic)
- Dual (grammatical number)
- Type (biology)
- Crystallography
- Nanotechnology