MXene-derived TiO2 nanosheets/rGO heterostructures for superior sodium-ion storage
Transition metal oxides hold promise as electrode materials for energy-storage devices such as batteries and supercapacitors. However, achieving ideal electrode materials with high capacity, long-term cycling stability, and superb rate capability remains a challenge. In this study, we present a self...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2025-01-01
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| Series: | ChemPhysMater |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772571524000202 |
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| Summary: | Transition metal oxides hold promise as electrode materials for energy-storage devices such as batteries and supercapacitors. However, achieving ideal electrode materials with high capacity, long-term cycling stability, and superb rate capability remains a challenge. In this study, we present a self-assembled heterogeneous structure consisting of TiO2 nanosheets derived from Ti3C2Tx MXene and reduced graphene oxide. This structure facilitates the formation of heterogeneous structures while establishing a conductive network. The restacking of porous TiO2 nanosheets and reduced graphene oxide within the heterostructure results in high porosity and excellent conductivity. Due to enhanced electron and Na+ transfer, as well as improved structural stability during the Na+ insertion/extraction process, this heterogeneous structure exhibited exceptional Na+ storage performance. Specifically, it exhibits a long-term cycling stability (217 mAh g−1 at 10 C, 5000 cycles) and an ultrahigh rate capability (135 mAh g–1, 40 C). Analysis of electrode reaction kinetics suggests that Na+ storage in the heterostructure is predominantly governed by a surface-controlled process. Our results provide a promising strategy for utilizing self-assembled heterostructures in advanced energy storage applications. |
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| ISSN: | 2772-5715 |