Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 17, Pages 6051-6057Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta13546b
Keywords
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Funding
- University of Maryland
- NSF grant CMII [1000425]
- NSF grants CMMI [0928278, 1069076]
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One-dimensional (1-D) nanostructures such as nanowires and nanotubes have been widely explored for anodes with high specific capacity in Li-ion batteries, which effectively release the mechanical stress to avoid structure pulverization. However, 1-D nanostructures typically have a high surface area, which leads to a large irreversible capacity in the first cycle due to a solid electrolyte interface (SEI) formation. Two dimensional (2-D) nanowalls can address the same challenges as 1-D nanostructures, with a much lower surface area. For the first time, we demonstrated a 2-D nanowall structure with silicon for Li-ion batteries. Excellent performance for the first Coulombic efficiency (CE) has been achieved. Such a 2-D nanowall structure can also be applied in other devices with improved performance where nanostructures are needed but a high surface area is problematic.
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