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Thissandier, F., Gentile, P., Brousse, T., Bidan, G. & Sadki, S. (2014) Are tomorrow's micro-supercapacitors hidden in a forest of silicon nanotrees? J. Power Sources, 269 740–746.
Added by: Laurent Cournède (2016-03-10 21:01:54) |
| Type de référence: Article DOI: 10.1016/j.jpowsour.2014.05.060 Numéro d'identification (ISBN etc.): 0378-7753 Clé BibTeX: Thissandier2014 Voir tous les détails bibliographiques  |
Catégories: ST2E Mots-clés: Carbon, cvd, Electrochemical capacitors, Electrochemical double layer, Electrodes, growth, ionic liquid, micro-supercapacitors, porous silicon, si nanowires, Silicon nano-trees, surface migration, ultracapacitors Créateurs: Bidan, Brousse, Gentile, Sadki, Thissandier Collection: J. Power Sources |
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Silicon nanotrees (SiNTrs) have been grown by Chemical Vapor Deposition (CVD) via gold catalysis and a three steps process: trunks and branches growth are separated by a new gold catalyst deposition. The influence of growth conditions and the second gold catalyst deposition method on SiNTrs morphology are investigated. SiNTrs based electrodes show a capacitive behavior and better capacitance than the corresponding silicon nanowires (SiNWs) electrode. Electrode capacitance is increased up to 9000 mu F cm(-2), i.e. 150 fold higher than for bulk silicon. Micro-supercapacitors with SiNTrs electrodes have a remarkable stability (only 1.2\% loses of their initial capacitance after more than one million cycles). The use of an ionic liquid based electrolyte leads to a high maximum power density (around 225 mW cm(-2)) which is competitive with Onion Like Carbon based micro-supercapacitors. (C) 2014 Elsevier B.V. All rights reserved.
Added by: Laurent Cournède |