期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 3, 期 20, 页码 11117-11129出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta00961h
关键词
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资金
- Office of Vehicle Technologies of the U.S. Department of Energy under the Batteries for Advanced Transportation Technologies (BATT) program [DE-AC02-05CH11231, 6951369]
- National Science Foundation [NSF-CBET-0933141]
- Ford Foundation
- Edward R. Weidlein Chair Professorship funds
- Center for Complex Engineered Materials (CCEMM)
Strain engineered unique architectures of silicon nanotubes have garnered tremendous attention as high capacity and stable lithium-ion battery (LIB) anodes. However, the expensive nature of the hitherto synthesis techniques used to produce the silicon nanotubes combined with the inferior yield and poor loading densities have rendered these unique morphologies unattractive for commercial LIB systems. In this study, we report for the first time, a simple, facile, and more importantly, recyclable sacrificial template based approach involving magnesium oxide (MgO) nanorods for producing scalable quantities of hollow silicon nanotubes (h-SiNTs) architectures. Electrodes fabricated from these h-SiNTs derived from this novel scalable approach exhibit equitable loadings and reversible capacities in excess of 1000 mA h g(-1) at a high current density of 2 A g(-1) for nearly 400 cycles, combined with a very low fade rate of only 0.067% loss per cycle. The high capacity, good current rate characteristics combined with excellent charge-transfer kinetics as well as the long cycle life of these engineered h-SiNTs render this approach viable for industry scale while also boding promise for practical applications.
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