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Evolution of the performance of SiNWs based electrochemical capacitor in Ionic electrolyte

Ankur Soam, Rajiv Dusane

Volume 2, Issue 4, Page 214-217, Year 2017 | DOI: 10.5185/amp.2017/402

Keywords: VLS mechanism, silicon nanowires, hot-wire CVP, micro-supercapacitor, cyclic voltammetry.

Abstract: The development of micro-supercapacitor (µ-SC) based on silicon nanowires (SiNWs) has increased the demands of cost-effective methods via low temperature processing routes for the fabrication of SiNWs which can enable the realization of µ-SC directly on a Si chip. In this work, SiNWs synthesized by hot-wire chemical vapor processing (HWCVP) at low substrate temperature of 350 oC have been explored as the electrodes for the use in µ-SC. Electrochemical behavior was tested by using cyclic voltammetry (CV) and galvanostatic charging/discharging in an ionic electrolyte. TEM characterization reveals as-grown SiNWs have inner crystalline core (c-core) sheeted with an amorphous layer of silicon (a-Si) which has poor electrical conductivity and reduces the capacitance of SiNWs. Copyright © 2017 VBRI Press

Advanced Materials Proceedings

The official journal of the International Association of Advanced Materials (IAAM)