Mixed valence nanostructured Mn3O4 for supercapacitor applications

Bose, Vipin C.; Biju, Vasudevanpillai

doi:10.1007/s12034-015-0906-z

Cited by 46 publications

(17 citation statements)

References 38 publications

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“…As shown in Figure 6c, a gravimetric energy density of 41.7 Wh kg –1 is obtained for the Mn 3 O 4 NW electrodes, which is higher than those of the other Mn 3 O 4 supercapacitors in the literature. 41,58,59 But the present Mn 3 O 4 supercapacitor electrodes exhibit attractive features such as safety, environment friendliness, and flexibility. An areal specific energy density of 79.4 mWh cm –2 at 5 mV s –1 is obtained for Mn 3 O 4 NW supercapacitor electrodes, and the variation in the areal specific energy density of the supercapacitor electrode is depicted in Figure 6d.…”

Section: Results and Discussionmentioning

confidence: 99%

Two-Dimensional Mn₃O₄Nanowalls Grown on Carbon Fibers as Electrodes for Flexible Supercapacitors

2019

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Emerging flexible and wearable electronic devices necessitates the development of fiber-type energy storage devices to power them. Supercapacitors received great attention for applications in flexible and wearable devices due to their scalability, safety, and miniature size. Herein, we report the fabrication of a flexible supercapacitor using manganese(II,III) oxide (Mn 3 O 4 ) nanowalls (NWs) grown by electrochemical deposition on carbon fiber (CF) as electrode-active material. Here, CF serves as both a substrate for the growth of Mn 3 O 4 NWs and a current collector for making a lightweight supercapacitor. Two-dimensional Mn 3 O 4 NWs were uniformly grown on CF with high surface coverage. A three-dimensional nanostructured electrode is obtained using these individual two-dimensional Mn 3 O 4 NWs. The Mn 3 O 4 NWs grown on CF are characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and Raman spectroscopy. A symmetric sandwich-type supercapacitor is fabricated using two-dimensional Mn 3 O 4 NW electrodes in an aqueous 1 M Na 2 SO 4 electrolyte. The Mn 3 O 4 NW supercapacitor electrode exhibits a specific capacitance of 300.7 F g –1 at a scan rate of 5 mV s –1 . The assembled symmetric sandwich-type supercapacitor displayed high flexibility even at a bending angle of 180° without altering its performance. The Mn 3 O 4 NW supercapacitor also displayed a long cycle life of 7500 cycles with 100% capacitance retention.

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Section: Results and Discussionmentioning

confidence: 99%

Two-Dimensional Mn₃O₄Nanowalls Grown on Carbon Fibers as Electrodes for Flexible Supercapacitors

2019

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“…The electrochemical supercapacitors have recently shown a lot of attention as promising green energy storage devices of high‐rate dischargeability, high cycling stability (more than ∼100,000 cycles), with high power density and simple operational mechanism . The supercapacitors have unique energy storage through the formation of electrolyte ions on the surface of electro‐active materials ,.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Investigations of Hydrothermally Synthesized Porous Cobalt Oxide (Co₃ O₄ ) Nanorods: Supercapacitor Application

2017

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Well‐crystalline porous cobalt oxide (Co3O4) nanorods (NRs) were synthesized through hydrothermal method and applied as electro‐active electrode material for pseudo‐supercapacitors. At low calcination temperature of 300 °C, the porous and smooth morphology of Co3O4 NRs were obtained whereas, the rod morphology changed to stacks of nanoparticles at high calcination at 500 °C. The Fourier transform infrared (FTIR) and Raman scattering spectroscopies revealed the formation of pure and good crystal quality porous Co3O4 NRs. Brunauer‐Emmett‐Teller (BET) surface area analysis of porous Co3O4 NRs showed the decrease of surface area and pore volume with the increase of calcination temperature. The charge storage ability, cycle stability and ion transport of the synthesized porous Co3O4 NRs electrode were investigated by performing cyclic voltammetry (CV) in 6 M KOH electrolyte. As compared to Co3O4 NRs‐500 °C electrode, the specific capacitance of ∼226.3 Fg−1 at a scan rate of ∼10 mVs−1 was achieved by the fabricated pseudo‐supercapacitors based on porous Co3O4 NRs‐300 °C electrode. The synthesized porous Co3O4 NRs electrode showed excellent stability by maintaining up to ∼76% capacity retention after 5000 cycles.

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“…The intensity ratio of D to G band (I D /I G ) of HOOC‐GO shows more structural defects as compared to graphene oxide [21a]. The I D /I G ratio of GO/Mn 3 O 4 and Fc−G/Mn 3 O 4 were calculated to be 0.85 [21b] and 0.98 respectively, indicating that prepared composite has higher electronic integrity and facilitates the electron transfer in electrochemical observations.…”

Section: Resultsmentioning

confidence: 99%

Design of a Sensitive Electrochemical Sensor Based on Ferrocene‐reduced Graphene Oxide/Mn‐spinel for Hydrazine Detection

et al. 2020

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Herein, we report construction of a ferrocene‐reduced graphene oxide‐Mn spinel modified glassy carbon electrode (Fc−G/Mn3O4/GCE) as a sensitive electrochemical probe for hydrazine detection via its oxidation. The synergistic effect of ferrocene, graphene oxide and Mn3O4 provides it a great electrocatalytic effect. The electrochemical investigations of Fc−G/Mn3O4/GCE were studied using cyclic voltammetry, while differential pulse voltammetry was utilized for recording the electrocatalytic sensing of hydrazine. The prepared Fc−G/Mn3O4 offers a platform for sensitive and selective detection of low‐level hydrazine in two linear ranges from 0.045 to 108 μM and 108 to 653 μM with limit of detection 8.5 nM. Real sample analysis was also performed in local industrial water samples with satisfactory recovery results.

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Mixed valence nanostructured Mn3O4 for supercapacitor applications

Cited by 46 publications

References 38 publications

Two-Dimensional Mn₃O₄Nanowalls Grown on Carbon Fibers as Electrodes for Flexible Supercapacitors

Two-Dimensional Mn₃O₄Nanowalls Grown on Carbon Fibers as Electrodes for Flexible Supercapacitors

Electrochemical Investigations of Hydrothermally Synthesized Porous Cobalt Oxide (Co₃ O₄ ) Nanorods: Supercapacitor Application

Design of a Sensitive Electrochemical Sensor Based on Ferrocene‐reduced Graphene Oxide/Mn‐spinel for Hydrazine Detection

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Mixed valence nanostructured Mn3O4 for supercapacitor applications

Cited by 46 publications

References 38 publications

Two-Dimensional Mn3O4Nanowalls Grown on Carbon Fibers as Electrodes for Flexible Supercapacitors

Two-Dimensional Mn3O4Nanowalls Grown on Carbon Fibers as Electrodes for Flexible Supercapacitors

Electrochemical Investigations of Hydrothermally Synthesized Porous Cobalt Oxide (Co3 O4 ) Nanorods: Supercapacitor Application

Design of a Sensitive Electrochemical Sensor Based on Ferrocene‐reduced Graphene Oxide/Mn‐spinel for Hydrazine Detection

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Product

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Two-Dimensional Mn₃O₄Nanowalls Grown on Carbon Fibers as Electrodes for Flexible Supercapacitors

Two-Dimensional Mn₃O₄Nanowalls Grown on Carbon Fibers as Electrodes for Flexible Supercapacitors

Electrochemical Investigations of Hydrothermally Synthesized Porous Cobalt Oxide (Co₃ O₄ ) Nanorods: Supercapacitor Application