KAUST Grant NumberKUS-11-001-12
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AbstractWe report that established simple lithium (Li) ion battery cycles can be used to produce nanopores inside various useful one-dimensional (1D) nanostructures such as zinc oxide, silicon, and silver nanowires. Moreover, porosities of these 1D nanomaterials can be controlled in a stepwise manner by the number of Li-battery cycles. Subsequent pore characterization at the end of each cycle allows us to obtain detailed snapshots of the distinct pore evolution properties in each material due to their different atomic diffusion rates and types of chemical bonds. Also, this stepwise characterization led us to the first observation of pore size increases during cycling, which can be interpreted as a similar phenomenon to Ostwald ripening in analogous nanoparticle cases. Finally, we take advantage of the unique combination of nanoporosity and 1D materials and demonstrate nanoporous silicon nanowires (poSiNWs) as excellent supercapacitor (SC) electrodes in high power operations compared to existing devices with activated carbon. © 2010 American Chemical Society.
CitationChoi JW, McDonough J, Jeong S, Yoo JS, Chan CK, et al. (2010) Stepwise Nanopore Evolution in One-Dimensional Nanostructures. Nano Lett 10: 1409–1413. Available: http://dx.doi.org/10.1021/nl100258p.
SponsorsWe thank Brian J. Smith for help in the porosity measurements. J.M. acknowledges support from National Science Foundation and National Defense Science and Engineering Graduate Fellowships. C.K.C. acknowledges support from National Science Foundation and Stanford Graduate Fellowships. This work was partially supported by the King Abdullah University of Science and Technology (KAUST) Investigator Award (No. KUS-11-001-12) and partially supported by a DOE-EFRC at Stanford: Center on Nanostructuring for Efficient Energy Conversion (CNEEC) (NO. DE-SC0001060).
PublisherAmerican Chemical Society (ACS)
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