Superior Lithium Electroactive Mesoporous Si@Carbon Core−Shell Nanowires for Lithium Battery Anode Material
Mesoporous Si@carbon core−shell nanowires with a diameter of ∼6.5 nm were prepared for a lithium battery anode material using a SBA-15 template. As-synthesized nanowires demonstrated excellent first charge capacity of 3163 mA h/g with a Coulombic efficiency of 86% at a rate of 0.2 C (600 mA/g) betwe...
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Veröffentlicht in: | Nano letters 2008-11, Vol.8 (11), p.3688-3691 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Mesoporous Si@carbon core−shell nanowires with a diameter of ∼6.5 nm were prepared for a lithium battery anode material using a SBA-15 template. As-synthesized nanowires demonstrated excellent first charge capacity of 3163 mA h/g with a Coulombic efficiency of 86% at a rate of 0.2 C (600 mA/g) between 1.5 and 0 V in coin-type half-cells. Moreover, the capacity retention after 80 cycles was 87% and the rate capability at 2 C (6000 mA/g) was 78% the capacity at 0.2 C. |
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ISSN: | 1530-6984 1530-6992 |
DOI: | 10.1021/nl801853x |