Superior lithium electroactive mesoporous Si@carbon core-shell nanowires for lithium battery anode material.
basic_science · Level V
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- Record sourced from PubMed, PMID 18950239.
- Also identified by DOI 10.1021/nl801853x.
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Abstract
Mesoporous Si@carbon core-shell nanowires with a diameter of approximately 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.