Graphite nano-modified SnO2-Ti2C MXene as anode material for high-performance lithium-ion batteries
•SnO2-Ti2C-C composite has been synthesized by hydrothermal and balling methods.•The ultrathin graphite nanosheet structure can facilitate lithium-ion transport.•Carbon coating can protect Ti2C from oxidation and self-stack.•The ternary SnO2-Ti2C-C composite can withstand high stress during cycling....
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Veröffentlicht in: | Journal of alloys and compounds 2021-12, Vol.886, p.161139, Article 161139 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | •SnO2-Ti2C-C composite has been synthesized by hydrothermal and balling methods.•The ultrathin graphite nanosheet structure can facilitate lithium-ion transport.•Carbon coating can protect Ti2C from oxidation and self-stack.•The ternary SnO2-Ti2C-C composite can withstand high stress during cycling.•SnO2-Ti2C-C composite shows high rate and cycling stability.
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A SnO2-Ti2C-C nanoparticle composite anode was synthesized by using facile ball milling combined with hydrothermal treatment. The SnO2-Ti2C nanoparticles were homogeneously coated with graphite nanosheets by ball milling. Graphite nanosheets served as ideal volume expansion buffers and good electron conductors. Consequently, a high initial coulombic efficiency of 80.3% was displayed, and the system exhibited a high reversible capacity of 1036.87 mAh g−1 maintained after 200 cycles at 0.2 A g−1, a rate capacity of 447.58 mAh g−1 at a high current density of 5.0 A g−1, and long cycling stability with a capacity of 763.18 mAh g−1 after 500 cycles at 2.0 A g−1. These results indicate that the incorporation of Ti2C, graphite nanosheets, and SnO2 enhanced the performance of SnO2-based anodes for battery applications. |
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ISSN: | 0925-8388 1873-4669 |
DOI: | 10.1016/j.jallcom.2021.161139 |