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Stepwise Nanopore Evolution in One-Dimensional Nanostructures

Cited 202 time in Web of Science Cited 202 time in Scopus
Authors
Choi, Jang Wook; McDonough, James; Jeong, Sangmoo; Yoo, Jee Soo; Chan, Candace K.; Cui, Yi
Issue Date
2010-04
Citation
Nano Letters, Vol.10 No.4, pp.1409-1413
Keywords
NanoporeNanowireSupercapacitor
Abstract
We 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.
ISSN
1530-6984
URI
http://hdl.handle.net/10371/164711
DOI
https://doi.org/10.1021/nl100258p
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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