Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 14, Pages 10886-10891Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am500448f
Keywords
lithium-ion battery; alloy anode; intermetallic; iron antimonide; mechanochemical reaction
Funding
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-SC0005397]
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FeSb2-Al2O3-C nanocomposite synthesized by ambient-temperature high-energy mechanical milling (HEMM) of Sb2O3, Fe, Al, and C has been investigated as an anode material for lithium-ion batteries. The FeSb2-Al2O3-C nanocomposites are characterized with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM). The characterization data reveal it to be composed of crystalline FeSb2 nanoparticles finely dispersed in an amorphous matrix of Al2O3 and carbon. The FeSb2-Al2O3-C nanocomposite exhibits an initial discharge (lithiation) capacity of 877 mAh g(-1) an initial charge (delithiation) capacity of 547 mAh g(-1), yielding an initial coulombic efficiency of 62%. The extended cycling performance for this composite is far superior to that of the intermetallic FeSb2 or a similarly prepared FeSb2-C composite. FeSb2-Al2O3-C retains a specific capacity of similar to 350 mAh g(-1) after 500 lithiation/delithiation cycles.
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