Microstructural characterization of porous manganese thin films for electrochemical supercapacitor applications

Djurfors, B.; Broughton, J. N.; Brett, Michael; Ivey, Douglas G.

doi:10.1023/b:jmsc.0000004401.81145.b6

Cited by 45 publications

(26 citation statements)

References 7 publications

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“…Recently, the natural abundance and low cost of manganese (Mn) oxide, accompanied by its satisfactory capacitive behavior in mild electrolytes and environmental compatibility, have made it one of the most promising electrode materials of supercapacitors. The preparation methods of Mn oxides for supercapacitor applications include thermal decomposition [7], co-precipitation [8][9][10][11], sol-gel processes [12][13][14][15], physical vapor deposition [16,17], hydrothermal synthesis [18,19], and anodic deposition [20][21][22]. It has been confirmed that the preparation methods and/or conditions could significantly affect the material characteristics of the obtained Mn oxides, and thereby their corresponding pseudocapacitive performance.…”

Section: Introductionmentioning

confidence: 99%

Manganese films electrodeposited at different potentials and temperatures in ionic liquid and their application as electrode materials for supercapacitors

Chang

Huang

Tsai

et al. 2008

Electrochimica Acta

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Section: Introductionmentioning

confidence: 99%

Manganese films electrodeposited at different potentials and temperatures in ionic liquid and their application as electrode materials for supercapacitors

Chang

Huang

Tsai

et al. 2008

Electrochimica Acta

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“…Inorganic thin films deposited by GLAD have been demonstrated for application in a number of fields, including sensors [26], carbon thin-film electrodes [27], supercapacitors [28] and photonic crystals [29]. The advantages of the GLAD process include the simultaneous fabrication of a large number of structures at a time, highly tunable structure geometry and the large surface area of the film itself.…”

Section: Resultsmentioning

confidence: 99%

Large-area microfabrication of three-dimensional, helical polymer structures

Elias¹,

Harris²,

Bastiaansen³

et al. 2004

J. Micromech. Microeng.

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A technique has been developed to fabricate polymeric helices with sub-micron dimensions. These helices are made using a double-templating process, in which an inorganic thin film deposited using glancing angle deposition acts as the master. The shape, pitch, handedness and number of turns of the polymer helices can be tuned by altering the deposition parameters of the master film. The structure of this positive master is copied into a negative intermediate template of photoresist, which itself acts as a master for the templating of polymer helices. This process is demonstrated with four multifunctional acrylates. The master, intermediate template and polymer helices are characterized using scanning electron microscopy, and the polymer helices are characterized using energy dispersive x-ray spectroscopy. It is shown that a large number of polymer helical microstructures, which are anchored to both a thick substrate and a thin capping layer, can be made in parallel over areas of mm 2 to cm 2 .

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“…Supercapacitor or electrochemical capacitor is an electrochemical energy storage device superior to its conventional dielectric counter parts in many aspects [1,2]. Owing to their fast charge/discharge characteristics, flexibility and long lifespan, they have attracted wide applications such as auxiliary power source in hybrid vehicles, portable mobile devices, ignition systems, micro-electronics, rockets etc., [3,4]. Based on the different operation mechanisms, the supercapacitors can be classified into two different categories: (1) double-layer capacitors, which are based on the non-faradic charge separation at the electrode/electrolyte interface and (2) pseudocapacitors, which are based on the faradic redox reaction of electroactive materials [5].…”

Section: Introductionmentioning

confidence: 99%

Investigation on spinel MnCo2O4 electrode material prepared via controlled and uncontrolled synthesis route for supercapacitor application

et al. 2015

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To analyze the impact of preparation routes on the electrochemical behavior of nanoparticles, manganese cobaltite (MnCo 2 O 4 ) has been synthesized by combustion (MnC-C) and hydrothermal route (MnC-H). The structural properties of synthesized nanoparticles were characterized by X-ray diffractometer studies which confirm the formation of cubic spinel phase with average crystallite size of 26 nm for combustion route prepared and 24 nm for hydrothermal route. The FT-IR spectrum shows two strong bands observed at 651 and 559 cm -1 that are characteristic to stretching vibrations of tetrahedral and octahedral sites of spinel MnCo 2 O 4 compounds. Elemental analysis, oxidation state, and chemical composition of these nanoparticles were examined using X-ray photoelectron spectroscopy. The morphology of synthesized nanoparticles was analyzed by SEM images. Loosely packed flake-like morphology was observed for MnC-H and typical spongy network structure with voids or pores was seen for MnC-C samples. BET analysis reveals the presence of mesopores and micropores in the prepared compounds. Influence of preparation route on capacitor behavior was evaluated by performing electrochemical characterizations such as cyclic voltammetry, chronopotentiometry, and AC impedance analysis. MnC-H exhibits a higher specific capacitance of 671 F g -1 at 5 mV s -1 scan rate compared to 510 F g -1 exhibited by MnC-C electrode material. Excellent capacitance retention of 92 % was demonstrated by MnC-H over 1000 continuous cycling. Results indicate that MnCo 2 O 4 prepared via controlled synthesis conditions (hydrothermal) shows better performance than combustion prepared.

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Microstructural characterization of porous manganese thin films for electrochemical supercapacitor applications

Cited by 45 publications

References 7 publications

Manganese films electrodeposited at different potentials and temperatures in ionic liquid and their application as electrode materials for supercapacitors

Manganese films electrodeposited at different potentials and temperatures in ionic liquid and their application as electrode materials for supercapacitors

Large-area microfabrication of three-dimensional, helical polymer structures

Investigation on spinel MnCo2O4 electrode material prepared via controlled and uncontrolled synthesis route for supercapacitor application

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