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Transformation of Silicon Nanowire into Nanopyramid in Alkaline Solution and its Implication in Silicon-Air Battery
- Transformation of Silicon Nanowire into Nanopyramid in Alkaline Solution and its Implication in Silicon-Air Battery
- 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
- Bulletin of the Korean Chemical Society, 37(7), 997-1003
- Article Type
- Alkaline Solutions; Alkalinity; Anodes; Discharge Performance; Electric Batteries; Electrodes; Metal-Air Battery; Metal-Assisted Chemical Etching; Nano-Pyramids; Nanowires; Passivation; Secondary Batteries; Silicon; Silicon Nanopyramids; Silicon Nanowires; Surface Passivation; Threshold Temperatures
- 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.
- Wiley-VCH Verlag
- Related Researcher
Lee, Ho Chun
Electrochemistry Laboratory for Sustainable Energy(ELSE)
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
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- Energy Science and EngineeringElectrochemistry Laboratory for Sustainable Energy(ELSE)1. Journal Articles
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