Single-crystalline Co2Si nanowires directly synthesized on silicon substrate for high-performance micro-supercapacitor

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 136
  • Download : 0
On-chip micro-supercapacitors are promising miniaturized micro-power sources for wireless sensors, portable electronic devices, and implantable medical devices due to their advanced features such as high power densities, fast charge-discharge, and superior cycling lifetimes. Transition metal silicide nanowires can meet the desired requirements for electrode materials for on-chip micro-supercapacitors, as they provide advantages such as high conductivity, high surface area, effective electrolyte transport, and ease of fabrication and integration on silicon. In the present work, we introduce freestanding single-crystalline Co2Si nanowires directly synthesized on a Si substrate for application in a high-performance on-chip micro-supercapacitor. Compared with the previously reported supercapacitors comprising Si-based nanowires, the single-crystalline Co2Si nanowires-based supercapacitor exhibits good supercapacitor performance, namely, high areal capacitance (similar to 983 mu F cm(-2) at 2 mu A cm(-2)), high energy density (similar to 629 mu J cm(-2) at 2 mu A cm(-2)), and excellent cyclability (similar to 94% after 4000 cycles) in an ionic liquid electrolyte. To the best of our knowledge, this is the first report on the electrochemical performance of metal silicide nanowires directly grown on a Si substrate for supercapacitor application. Our results demonstrate the potential of metal silicide nanowires as electrode materials for on-chip micro-super-capacitor application.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2019-08
Language
English
Article Type
Article
Citation

CHEMICAL ENGINEERING JOURNAL, v.370, pp.973 - 979

ISSN
1385-8947
DOI
10.1016/j.cej.2019.03.269
URI
http://hdl.handle.net/10203/262206
Appears in Collection
CH-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0