Abstract
Structural reconstruction derived from surface engineering has substantially improved fast and high-efficient charge storage for sodium-ion batteries. Here, a surface engineering strategy including phosphorus doping and nitrogen-doped carbon coating simultaneously realizes surface structural reconstruction and establishes a conductive network, which significantly enhances Na+ storage kinetics of TiO2. Expectedly, functionalized TiO2 nanocrystals with phosphorus doping and nitrogen-doped carbon coating present expedited electron and Na+ transfer and enhanced structural stability during Na+ insertion/extraction, fueled by the enhanced surface electrochemical reactivity and unique hybrid structure. Therefore, surface-engineered two-dimensional (2D) TiO2 nanosheets achieve exceptional Na+ storage performance including the ultralong cycling stability with reversible capacities of 223 mAh/g at 5C for 10,000 cycles at 5C, 212 mAh/g at 10C for 20,000 cycles, and 203 mAh/g at 20C for 5000 cycles, as well as an ultrahigh rate capability of 181 mAh/g up to 50C. This functionalizing strategy fueled by surface engineering paves a new way for achieving high-performed anode materials for sodium-ion batteries. © 2023 Elsevier B.V.
Original language | American English |
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Journal | Applied Surface Science |
Issue number | 158310 |
State | Published - 2023 |
Keywords
- 2D hierarchical structure
- Phosphorus doping
- Sodium-ion batteries
- Surface reconstruction
- Titanium dioxide
- Anodes
- Carbon
- Coatings
- Doping (additives)
- Metal ions
- Nanosheets
- Nitrogen
- Phosphorus
- Stability
- Storage (materials)
- 2d hierarchical structure
- Carbon coating
- Hierarchical structures
- Nitrogen-doped carbons
- Sodium ion batteries
- Storage performance
- Structural reconstruction
- Surface engineering
- Surfaces reconstruction