The specific capacitance of sol–gel synthesised spinel MnCo2O4 in an alkaline electrolyte

Kong, Ling‐Bin; Lü, Chao; Liu, Mao‐Cheng; Luo, Yan‐Ling; Kang, Long; Li, Xiaohong; Walsh, Frank C.

doi:10.1016/j.electacta.2013.10.089

Cited by 138 publications

(42 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 6a shows the CV curve recorded at 5 mV s -1 scan rate. MnCo 2 O 4 prepared by both methods exhibits pair of typical redox peaks depicting the major type of charge storage in the material as faradaic consistent with the earlier reports by Kong et al [43] and Zhang et al [47]. Between, -0.1 and 0.2 V potential region, CV curves of both electrode materials resemble nearly rectangular shape characteristic of ideal capacitance.…”

Section: Cyclic Voltammetry (Cv) Studiessupporting

confidence: 84%

“…4c, d) shows loosely packed agglomerates consisting of interconnected nanoparticles exhibiting a flake-like spherical structures. This kind of morphology may lead to an increase in the surface area of the electrode materials thereby increasing the wetting ability of the electrode materials which plays a vital role in [43]. Thus, from the information obtained by SEM, we can conclude that the hydrothermally prepared nanoparticles could be favorable for supercapacitor applications.…”

Section: Morphology Studiesmentioning

confidence: 84%

See 1 more Smart Citation

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

et al. 2015

View full text Add to dashboard Cite

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.

show abstract

Section: Cyclic Voltammetry (Cv) Studiessupporting

confidence: 84%

Section: Morphology Studiesmentioning

confidence: 84%

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

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Recently, spinel oxides like NiCo 2 O 4 [11], NiFe 2 O 4 [12,13] [16]. However, there are a few drawbacks like less utilization of electrode material and inferior structure.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

High performance electrochemical capacitor based on MnCo2O4 nanostructured electrode

Venkatachalam

Alsalme

Alghamdi

et al. 2015

Journal of Electroanalytical Chemistry

112

View full text Add to dashboard Cite

“…MnCo 2 O 4 is a very important mixed metal oxide with an inverse spinel structure and magnetic property. The quality of MnCo 2 O 4 powders strongly depends on the synthesis method and conditions, which determine particle size, morphology, specific surface area, lattice parameters, stoichiometry, and average Mn valence of MnCo 2 O 4 associated with adsorption, catalytic, and electrochemical performances [28][29][30]. Preparations of high-quality samples with unique three-dimensional structure and/or large surface area have generally been considered to be very helpful to improve adsorption, catalytic, and electrochemical performances of MnCo 2 O 4 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of rambutan-like MnCo2O4 and its adsorption performance for methyl orange

Wang

et al. 2015

J Therm Anal Calorim

View full text Add to dashboard Cite

A hierarchical rambutan-like MnCo 2 O 4 precursor is synthesized by a co-precipitation method in water-ethanol at room temperature. After being calcined at 400°C in air for 10 min with a heating rate of 1°C min -1 , the precursor MnCo 2 (C 2 O 4 ) 3 Á5.54H 2 O is transformed into the rambutan-like MnCo 2 O 4 microspheres composed of end-connected nanorods, which has a large specific surface area (155 m 2 g -1 ). When evaluated as adsorbent for methyl orange (MO), the rambutan-like MnCo 2 O 4 microspheres show excellent adsorption ability for methyl orange. The adsorption capacity of methyl orange on rambutan-like MnCo 2 O 4 is 185.14 mg g -1 under the conditions of initial MO concentration 12 mg L -1 and pH 2.09. Adsorption kinetics of methyl orange on rambutan-like MnCo 2 O 4 follows the pseudo-second-order kinetic model. The values of adsorption activation energy E a and enthalpy DH # are 5.71 ± 0.056 and 9.30 kJ mol -1 , respectively. Methyl orange adsorption on rambutan-like MnCo 2 O 4 is an endothermic and physical adsorption process.

show abstract

The specific capacitance of sol–gel synthesised spinel MnCo2O4 in an alkaline electrolyte

Cited by 138 publications

References 35 publications

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

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

High performance electrochemical capacitor based on MnCo2O4 nanostructured electrode

Synthesis of rambutan-like MnCo2O4 and its adsorption performance for methyl orange

Contact Info

Product

Resources

About