Crystallographically-oriented Mn oxide nanorod/nanowire arrays electrodes

Lu, Xu; Zhang, Ying; Zhang, Xue; Xia, Zi‐Hao; Wang, Haili; Sun, Jinghua; Dong, Ruiting; Wang, Fan

doi:10.1016/j.jallcom.2014.09.157

Cited by 11 publications

(6 citation statements)

References 28 publications

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“…The superior charge mobility of the Bi 2 S 3 -BG/W nanoplates is related to the presence of nanorod-like particles in the sample, and these particles provide short paths for unrestrained electron transport along their axis at high charge/discharge rates [51]. In turn, the electron propagation mechanism in Bi 2 S 3 micro-and nanospheres is expected to be more random, i.e., without a preferential direction, resulting in insufficient utilization of the electroactive sites for redox reactions at high current densities.…”

Section: Electrochemical Measurements Of Bi 2 Smentioning

confidence: 99%

Solvent-controlled morphology of bismuth sulfide for supercapacitor applications

Miniach

Gryglewicz

2018

J Mater Sci

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In our study, we report a facile solvothermal method for the synthesis of Bi 2 S 3 nanoparticles with unique morphologies using water and mixed solvent systems, such as ethylene glycol/water (1:1, v/v) and butyldiglycol/water (1:1, v/v). Altering the solution mixtures used in the solvothermal synthesis allowed the shape of the Bi 2 S 3 nanoparticles to be controlled. The synthesis of Bi 2 S 3 in water at 150°C for 24 h led to the formation of sphere-like particles 100-300 nm in size. Very uniform spherical nanospheres with diameters from 50 to 90 nm formed when ethylene glycol/water mixture (1:1, v/v) was used as the solvent under the same solvothermal conditions. The butyldiglycol/water mixture promoted the formation of plate-shaped Bi 2 S 3 nanoparticles composed of nanorods. The electrochemical properties of the Bi 2 S 3 samples were determined in a three-electrode cell in 6 mol L -1 KOH using cyclic voltammetry, galvanostatic charging/discharging and impedance spectroscopy. Among the synthesized materials, the Bi 2 S 3 sample obtained in the butyldiglycol/water mixture exhibited a superior capacitive behavior with an outstanding capacitance of 550 F g -1 (at 0.5 A g -1 ), and great cycle stability, which was reflected by a capacitance retention of 87% after 500 charge/discharge cycles. These results demonstrate the high potential of Bi 2 S 3 as an active electrode material for supercapacitors.

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Section: Electrochemical Measurements Of Bi 2 Smentioning

confidence: 99%

Solvent-controlled morphology of bismuth sulfide for supercapacitor applications

Miniach

Gryglewicz

2018

J Mater Sci

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“…[14][15][16][17] Over the past years, diverse types of materials, such as carbonaceous materials, conducting polymers, transition metal oxides/hydroxides and hybrid composites, have been studied as supercapacitor electrodes. [18][19][20][21][22] It is well known that the specific surface area is one of the most important factors for improving electric double-layer capacitance, as the energy storage is directly proportional to the contact area between the electrode and electrolyte. [16,23] Moreover, some heteroatoms such as oxygen and nitrogen in carbon electrodes can provide additional capacitance (i. e. pseudocapacitance) through redox reactions with electrolytes.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, electrode materials play an irreplaceable role in supercapacitors . Over the past years, diverse types of materials, such as carbonaceous materials, conducting polymers, transition metal oxides/hydroxides and hybrid composites, have been studied as supercapacitor electrodes . It is well known that the specific surface area is one of the most important factors for improving electric double‐layer capacitance, as the energy storage is directly proportional to the contact area between the electrode and electrolyte .…”

Section: Introductionmentioning

confidence: 99%

Regulating Capacitive Performance of Monolithic Carbon Sponges by Balancing Heteroatom Content, Surface Area and Graphitization Degree

et al. 2020

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Monolithic electrodes show a great advantage in energy storage devices. Nitrogen/oxygen co-doped carbons sponges (NOCSs) prepared from carbonized melamine foams are directly applied as the supercapacitor electrodes without any additives and binders. The influence of carbonization temperatures from 650 to 950°C on the heteroatom (N and O) content, surface area, graphitization degree, and capacitor performance of carbon sponges are systematically investigated, and it is found that NOCS-850 delivers a better overall capacitive properties for its balanced heteroatom content, surface area, and graphitization degree. It possess specific capacitances of 338 F g À 1 at a scan rate of 1.0 mV s À 1 and 168.3 F g À 1 at a current density of 0.5 A g À 1 in 1.0 M H 2 SO 4. After 5000 cycles of repeated charging/discharging process, the capacitance retention remains 107%. When being assembled into an all-solid-state supercapacitor, the NOCS-850 has a energy density of 5.38 Wh kg À 1 at a power density of 233 W kg À 1. A red light-emitting diode can be successfully lighted by three connected all-solid-state supercapacitors of NOCS-850, illustrating its potential application in energy storage field.

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“…It has been used in the catalytic oxidation of methane and reduction of nitrobenzene [4]. Lu et al prepared the amorphous MnO 2 thin film first then hydrothermally transformed it into Mn 3 O 4 nanowires under room temperature in a solution bath of 0.01 M manganese acetate and 0.01 M sodium sulfate mixture [5]. One-dimensional (1D) nanostructures, especially nanowires, are of great importance because of their specific shape and potential applications.…”

Section: Introductionmentioning

confidence: 99%

Controllable Synthesis of Mn3O4 Nanowires and Application in the Treatment of Phenol at Room Temperature

et al. 2020

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Nanosized Mn3O4 nanowires are prepared with KMnO4 and ethanol in mild conditions by facile hydrothermal method. Hydrothermal reaction temperature is optimized to get uniform nanowires. The prepared Mn3O4 nanowires exhibit high activity in the treatment of phenol at acid condition and room temperature. The 20 mg Mn3O4 nanowires can efficiently dispose of 50 mL phenol solution (0.2 g·L−1) at pH 2 and 25 °C. The nanowires before and after phenol treatment are characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) and the reaction mechanism is discussed.

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Crystallographically-oriented Mn oxide nanorod/nanowire arrays electrodes

Cited by 11 publications

References 28 publications

Solvent-controlled morphology of bismuth sulfide for supercapacitor applications

Solvent-controlled morphology of bismuth sulfide for supercapacitor applications

Regulating Capacitive Performance of Monolithic Carbon Sponges by Balancing Heteroatom Content, Surface Area and Graphitization Degree

Controllable Synthesis of Mn3O4 Nanowires and Application in the Treatment of Phenol at Room Temperature

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