Structural and Electrochemical Properties of Ultra-Deep Ni3Si Microchannels. Issue 4 (1st April 2022)

• Record Type: Journal Article
• Authors: Wei, Lufeng; Zhao, Bingquan; Zhao, Xiaoming; Huang, Yanfang; Han, Pengyu; Feng, Xiaobo; Cui, Yuntao; Zhao, Zhilong
• Is Part Of: Journal of the Electrochemical Society. Volume 169:Issue 4(2022)
• Publication Date: 2022-04-01
• Subjects: Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/1945-7111/ac65bb
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : As an crucial branch for the development of micro/nanoporous metals, its exploration in ultra-deep direction has been ignored. In this paper, the electrochemical characteristics of ultra-deep micro/nanoporous metals were revealed based on Ni3 Si microchannels for the first time. Ultra-deep Ni3 Si microchannels were fabricated using the composite technology of directional solidification and selective phase dissolution. The large-scale morphology of the ultra-deep Ni3 Si microchannels was characterized using field-emission scanning electron microscopy. The electrochemical characteristics of the ultra-deep Ni3 Si microchannels were analyzed by cyclic voltammetry and electrochemical impedance spectroscopy. With the increase in microchannel depth, the specific capacitance of the Ni3 Si microchannels increased, the charge storage capacity enhanced, and the charge transfer resistance considerably decreased from 38854 Ω·cm 2 to 404.9 Ω·cm 2 . The results suggested that ultra-deep Ni3 Si microchannels have excellent electrochemical properties and can be used as an inexpensive and large-scale self-supporting catalyst in electrochemistry.