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Transformation of Silicon Nanowire into Nanopyramid in Alkaline Solution and its Implication in Silicon-Air Battery

Title
Transformation of Silicon Nanowire into Nanopyramid in Alkaline Solution and its Implication in Silicon-Air Battery
Authors
Sarwar, S[Sarwar, Saad]Kim, M[Kim, Minsun]Baek, G[Baek, Giljae]Oh, I[Oh, Ilwhan]Lee, H[Lee, Hochun]
DGIST Authors
Lee, H[Lee, Hochun]
Issue Date
2016-07
Citation
Bulletin of the Korean Chemical Society, 37(7), 997-1003
Type
Article
Article Type
Article
Keywords
Alkaline SolutionsAlkalinityAnodesDischarge PerformanceElectric BatteriesElectrodesMetal-Air BatteryMetal-Assisted Chemical EtchingNano-PyramidsNanowiresPassivationSecondary BatteriesSiliconSilicon NanopyramidsSilicon NanowiresSurface PassivationThreshold Temperatures
ISSN
0253-2964
Abstract
Si-air battery (SAB) comprising of Si nanowire (SiNW) anode and alkaline solution and showing a working voltage of ca. 1.2V is investigated to elucidate the origin of superior discharge performance of the nanostructured Si anode to that of a planar Si anode. The SiNWs are found to transform into Si nanopyramids (SiNPs) upon immersion in the alkaline solution or when subjected to SAB discharge. In this regard, the improved performance of the SiNW anode is attributed to the formation of SiNPs with (111) facets that are intrinsically resistant to passivation. In addition, the nanostructured Si anode also shows a lower threshold temperature for the surface passivation than the planar Si anode, a merit that leads to a sustained discharge even at room temperature. © 2016 Korean Chemical Society, Seoul & Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
URI
http://hdl.handle.net/20.500.11750/2255
DOI
10.1002/bkcs.10808
Publisher
Wiley-VCH Verlag
Related Researcher
  • Author Lee, Ho Chun Electrochemistry Laboratory for Sustainable Energy(ELSE)
  • Research Interests Lithium-ion batteries; Novel Materials for rechargeable batteries; Novel energy conversion;storage systems; Electrochemistry; 리튬이차전지; 이차전지용 신규 전극 및 전해액; 신규 에너지변환 및 저장 시스템; 전기화학
Files:
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Collection:
Energy Science and EngineeringElectrochemistry Laboratory for Sustainable Energy(ELSE)1. Journal Articles


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