| DOI | Resolve DOI: https://doi.org/10.4028/www.scientific.net/MSF.706-709.884 |
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| Author | Search for: Yang, D.1 |
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| Affiliation | - National Research Council of Canada. NRC Industrial Materials Institute
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| Format | Text, Article |
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| Conference | 7th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC'2011, 1 August 2011 through 5 August 2011, Quebec City, QC |
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| Subject | Amorphous phase; Aqueous electrolyte; Cyclic durability; Different substrates; Electrochemical capacitor; Material research; Metal oxide thin films; Oxygen gas pressure; Oxygen pressure; PLD process; Polycrystalline; Pseudocapacitive; Scan rates; Specific capacitance; Stainless steel substrates; Super capacitor; Supercapacitor application; Ultracapacitors; Amorphous films; Amorphous materials; Capacitance; Capacitors; Cyclic voltammetry; Deposition; Manganese; Manganese oxide; Metallic compounds; Oxide films; Oxides; Oxygen; Programmable logic controllers; Pulsed laser deposition; Sodium; Stainless steel; Substrates; Thin films; Vapor deposition; X ray diffraction; Pulsed lasers; Manganese |
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| Abstract | Thin films of manganese oxides have been prepared by pulsed laser deposition (PLD) process on silicon and stainless steel substrates at different substrate temperatures and oxygen gas pressures. By proper selection of temperature and oxygen pressure during the PLD process, pure phases of Mn 2O 3, Mn 3O 4 as well as an amorphous phase of MnO x were successfully fabricated and characterized by X-ray diffraction. The pseudo-capacitance behaviors of those manganese oxides of different phases have also been evaluated by the electrochemical cyclic voltammetry in 0.1 M Na 2SO 4 aqueous electrolyte. Their specific current and capacitance determined at different scan rates were calculated and compared. The results show that polycrystalline Mn 2O 3 phase has the highest specific current and capacitance, while the values for polycrystalline Mn 3O 4 films are the lowest. The amorphous phase MnOx films have the values sitting in between those of Mn 2O 3 and Mn 3O 4. The specific capacitance of Mn 2O 3 films reaches 200 F/g at 1 mV/sec scan with excellent stability and cyclic durability. This work has demonstrated that PLD is a very promising technique for supercapacitor material research due to its excellent flexibility and capability of controlling microstructures and phases of various materials. © 2012 Trans Tech Publications, Switzerland. |
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| Publication date | 2012 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21269325 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | e406e215-db66-45d1-ad6c-e4d07ed49b07 |
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| Record created | 2013-12-12 |
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| Record modified | 2020-04-21 |
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