Journal ArticleDOI
Investigations on porous silicon as electrode material in electrochemical capacitors
Reads0
Chats0
TLDR
In this article, macroporous silicon was used to increase the surface exchange between pore surface and electrolyte and achieved a unit cell capacitance of 320 µF/cm2.Abstract:
In this study, we have demonstrated the possibility of using macroporous silicon electrodes in electrochemical capacitors. Macroporous silicon was used to increase the surface exchange between pore surface and electrolyte. The inherent resistivity of the porous silicon can be reduced through the use of subsequent doping and metallization processes of the macropore surface. A systematic study of the electrolyte concentration and the porous silicon depth influences was also performed. A unit cell capacitance value of 320 µF/cm2 was obtained with doped and metallized p-type macroporous silicon electrodes. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)read more
Citations
More filters
Journal ArticleDOI
Progress of electrochemical capacitor electrode materials: A review
Yong Zhang,Hui Feng,Xingbing Wu,Lizhen Wang,Aiqin Zhang,Tongchi Xia,Huichao Dong,Xiaofeng Li,Linsen Zhang +8 more
TL;DR: In this article, the storage principles and characteristics of electrode materials, including carbon-based materials, transition metal oxides and conductive polymers for electrochemical capacitors are depicted briefly, and the composites of pseudocapacitive and carbonaceous materials are promising electrode materials for ECs because of their good electrical conductivity, low cost and high mass density.
Journal ArticleDOI
Surface engineered porous silicon for stable, high performance electrochemical supercapacitors
Landon Oakes,Andrew S. Westover,Jeremy W. Mares,Shahana Chatterjee,William R. Erwin,Rizia Bardhan,Sharon M. Weiss,Cary L. Pint +7 more
TL;DR: P-Si is demonstrated as a promising new platform for grid-scale and integrated electrochemical energy storage and a technique generalizable to mesoporous and nanoporous materials that decouples the engineering of electrode structure and electrochemical surface stability to engineer performance in electrochemical environments is demonstrated.
Journal ArticleDOI
3D hierarchical assembly of ultrathin MnO2 nanoflakes on silicon nanowires for high performance micro-supercapacitors in Li- doped ionic liquid
Deepak P. Dubal,David Aradilla,Gérard Bidan,Pascal Gentile,Thomas J. S. Schubert,Jan Wimberg,Saïd Sadki,Pedro Gómez-Romero +7 more
TL;DR: A novel architecture design of hierarchical MnO2@silicon nanowires (MnO2 @SiNWs) hetero-structures directly supported onto silicon wafer coupled with Li-ion doped 1-Methyl-1-propylpyrrolidinium bis(trifluromethylsulfonyl)imide (PMPyrrBTA) ionic liquids as electrolyte for micro-supercapacitors is reported.
Journal ArticleDOI
Conformal titanium nitride in a porous silicon matrix: A nanomaterial for in-chip supercapacitors
Kestutis Grigoras,Jari Keskinen,Leif Grönberg,Elina Yli-Rantala,Sampo Laakso,Hannu Välimäki,Pertti Kauranen,Jouni Ahopelto,Mika Prunnila +8 more
TL;DR: In this article, the authors demonstrate that excellent wettability and electrochemical properties in aqueous and organic electrolytes can be obtained by coating the porous silicon matrix with an ultra-thin layer of titanium nitride by atomic layer deposition.
Journal ArticleDOI
Highly doped silicon nanowires based electrodes for micro-electrochemical capacitor applications
Fleur Thissandier,Annaïg Le Comte,Annaïg Le Comte,Olivier Crosnier,Pascal Gentile,Gérard Bidan,Emmanuel Hadji,Thierry Brousse,Saïd Sadki +8 more
TL;DR: In this paper, high-doped silicon nanowires (SiNWs) have been used as electrode materials for micro-capacitors in a standard organic-based electrolyte.
References
More filters
Journal ArticleDOI
Silicon quantum wire array fabrication by electrochemical and chemical dissolution of wafers
TL;DR: In this paper, free standing Si quantum wires can be fabricated without the use of epitaxial deposition or lithography using electrochemical and chemical dissolution steps to define networks of isolated wires out of bulk wafers.
Journal ArticleDOI
The Physics of Macropore Formation in Low‐Doped p‐Type Silicon
Volker Lehmann,S. Ronnebeck +1 more
TL;DR: In this article, the pore walls in hydrofluoric acid are caused by a depletion of holes due to the n-type doping of the substrate, and the dimensions of the pores are estimated based on these findings.
Journal ArticleDOI
Formation Mechanism and Properties of Electrochemically Etched Trenches in n‐Type Silicon
Volker Lehmann,Helmut Föll +1 more
TL;DR: In this article, the spontaneous trench formation in n-type silicon immersed in hydrofluoric acid under anodic bias is demonstrated and the resulting microstructures are characterized and explained by a model which takes into account the conditions of the space charge region the minority carrier current and the crystal orientation.
Journal ArticleDOI
Materials for electrochemical capacitors: Theoretical and experimental constraints
TL;DR: In this article, the authors survey the published data of available electrode materials possessing high specific double-layer or pseudocapacitance and examine their reported performance data in relation to their theoretical expectations.
Journal ArticleDOI
Mixed solvent electrolyte for high voltage lithium metal secondary cells
TL;DR: In this article, the authors examined various solvents and solutes as electrolytes for high voltage lithium secondary cells in terms of the oxidation potential, specific conductivity and cycling performance of Li/LiMn1.9Co0.1O4 cells.