Nanocomposite of (α-Mn3O4/MnO)@rGO as a high performance electrode material for supercapacitors

Gangwar, Anshu; Das, Trupti; Shaw, S.K.; Prasad, N.K.

doi:10.1016/j.electacta.2021.138823

Cited by 13 publications

(4 citation statements)

References 46 publications

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“…The unique chemical and structural characteristics attributed to Mn 3 O 4 ‐MnO 2 in the present study were analyzed using UV‐Vis spectroscopy, XRD, SEM, and TEM in agreement with biologically and chemically synthesized Mn 3 O 4 ‐MnO 2 nanoparticles [18–24]. The magnetic property of Mn 3 O 4 ‐MnO 2 nanocomposite is a function of the external magnetic field.…”

Section: Discussionmentioning

confidence: 62%

“…Recently, chemically synthesized Mn 3 O 4 -MnO 2 nanocomposites have been reported to exhibit excellent catalytic activity for the degradation of methylene blue, ciprofloxacin, and volatile organic compounds [18][19][20][21]. Also, Mn 3 O 4 -MnO 2 nanocomposites have been explored widely for their application in high-performance supercapacitors [22][23][24]. While Zeng et al [25] claimed Mn 3 O 4 -MnO 2 hetero-nanorods/graphene nanocomposite for highly sensitive electrochemical detection of hydrogen peroxide.…”

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confidence: 99%

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Characterization of Mn₃O₄‐MnO₂ nanocomposites biosynthesized by cell lysate of Haloferax alexandrinus GUSF‐1

Alvares

Gaonkar

Naik³

et al. 2023

J Basic Microbiol

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Manganese oxide nanocomposites attract huge attention in various biotechnological fields due to their extensive catalytic properties. This study reports an easy, rapid, and cost‐effective method of using the cell lysate of haloarchaeon, Haloferax alexandrinus GUSF‐1 for the synthesis of manganese oxide nanoparticles. The reaction between the cell lysate and manganese sulfate resulted in the formation of a dark brown precipitate within 48 h at room temperature. The X‐ray diffraction pattern showed the existence of Mn3O4 and MnO2 phases consistent with the JCPDS card no. (01‐075‐1560 and 00‐050‐0866). The dark brown colloidal suspension of MnO3‐MnO2 in methanol showed maximum absorption between 220 and 260 nm. The EDX spectrum confirmed the presence of manganese and oxygen. The Transmission electron microscopy revealed the spherical morphology with an average particle size between 30 and 60 nm. The magnetic moment versus magnetic field (MH) curve, at room temperature (300 K) did not saturate even at a high magnetic field (±3T) indicating the paramagnetic nature of the prepared nanocomposite. The Atomic Emission Spectroscopic analysis showed a negligible amount of soluble manganese (0.03 ppm in 50 ppm) in the Mn3O4‐MnO2 suspension suggesting the maximum stability of the material in the solvent over time. Interstingly, Mn3O4‐MnO2 nanocomposites evidenced antimicrobial activity in the order of Pseudomonas aeruginosa > Salmonella typhi > Escherichia coli > Proteus vulgaris > Candida albicans > Staphylococcus aureus. Conclusively, this is the first report on the formation of Mn3O4‐MnO2 nanocomposites using cell lysate of salt pan haloarcheon Haloferax alexandrinus GUSF‐1 with antimicrobial potential.

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Section: Discussionmentioning

confidence: 62%

mentioning

confidence: 99%

Characterization of Mn₃O₄‐MnO₂ nanocomposites biosynthesized by cell lysate of Haloferax alexandrinus GUSF‐1

Alvares

Gaonkar

Naik³

et al. 2023

J Basic Microbiol

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“…where C is the mass-specific capacitance (F/g), I is the discharge current (A), ~t is the discharge time (s), m is the mass of the active substance (g), and ~V is the potential window (V). [43,44] The calculated results are shown in Figure 4(c), and the specific capacitances of M-120, M-140, M-160, and M-180 are 132.5 F/g, 221 F/g, 209.6 F/g, and 149.1 F/g, respectively, at a current density of 0.2 A/g. The M-140 has a higher charge storage capacity.…”

Section: Electrochemical Testingmentioning

confidence: 99%

Synthesis and Electrochemical Properties of One‐Dimensional γ‐MnOOH Nanorods

Zhao,

Li,

Zhang

2024

ChemistrySelect

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MnOOH has received much attention from researchers as a supercapacitor electrode material. In this article, one‐dimensional γ‐MnOOH nanorods were prepared by the hydrothermal method using the redox reaction between MnO4− and Mn2+, and the effects of temperatures on the crystalline phases and electrochemical properties of the samples were investigated. The materials were characterized using XRD, FT‐IR, SEM, TEM, Raman and XPS; electrochemical properties were tested using CV, GCD and EIS. The results show that the reaction temperature plays an important role in the generation of γ‐MnOOH. The samples were pure phases of γ‐MnOOH (M‐140) at the reaction temperature of 140 °C, showing interlaced nanorod morphology, and when the reaction temperature was increased to 180 °C, a mixed phase of MnOOH and Mn3O4 appeared. In contrast, the electrochemical performance of γ‐MnOOH nanorods (M‐140) was superior to the other samples, reaching a specific capacitance of 221 F/g at a current density of 0.2 A/g. The capacitance retention was 93.8 % after charging and discharging the M‐140 2000 times at a current density of 6 A/g. Supercapacitors assembled with γ‐MnOOHand activated carbon (AC) have excellent energy storage performance, and a high energy density of 40.6 Wh/kg is obtained at a power density of 196.7 W/kg.

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“…In order to improve the electrical conductivity of MnO/MnO 2 electrodes, some plans that have attempted to induct conducting nanomaterials, such as graphene, have been adopted [ 37 , 38 ]. A. Gangwar et al [ 39 ] prepared a type of nanocomposite (α-Mn 3 O 4 /MnO)@rGO via a urea-assisted sol–gel method calcined at 700 °C in an inert N 2 atmosphere. The (α-Mn 3 O 4 /MnO)@rGO displayed an optimum specific energy of 10.8 Wh kg −1 and 3979 W kg −1 power density at 20 mA cm −2 current.…”

Section: Introductionmentioning

confidence: 99%

Study on Electrochemical Performance of MnO@rGO/Carbon Fabric-Based Wearable Supercapacitors

Zhang

et al. 2023

Materials

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In this work, we reported the electrochemical performance of a type of carbon fabric-based supercapacitor by coating MnOx@rGO nanohybrids on carbon fabric with a simple one-step hydrothermal method. We studied the mass ratio of MnOx to rGO on the electrochemical properties of the carbon fabric-based supercapacitors. We found that as the mass ratio is 0.8:1 for MnO@rGO, the supercapacitor with a loading of 5.40 mg cm−2 of MnO@rGO nanohybrids on carbon fabric exhibits a specific capacitance of 831.25 mF cm−2 at 0.1 mA cm−2 current density. It also shows long-term cycling capacitance retention of 97.2% after 10,000 charge–discharge cycles at a current density of 0.4 mA cm−2. We speculate that the high electrochemical performance results from the strong interfacial bonding between the hierarchical architecture of MnO@rGO nanohybrids and carbon fabric.

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Nanocomposite of (α-Mn3O4/MnO)@rGO as a high performance electrode material for supercapacitors

Cited by 13 publications

References 46 publications

Characterization of Mn₃O₄‐MnO₂ nanocomposites biosynthesized by cell lysate of Haloferax alexandrinus GUSF‐1

Characterization of Mn₃O₄‐MnO₂ nanocomposites biosynthesized by cell lysate of Haloferax alexandrinus GUSF‐1

Synthesis and Electrochemical Properties of One‐Dimensional γ‐MnOOH Nanorods

Study on Electrochemical Performance of MnO@rGO/Carbon Fabric-Based Wearable Supercapacitors

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Nanocomposite of (α-Mn3O4/MnO)@rGO as a high performance electrode material for supercapacitors

Cited by 13 publications

References 46 publications

Characterization of Mn3O4‐MnO2 nanocomposites biosynthesized by cell lysate of Haloferax alexandrinus GUSF‐1

Characterization of Mn3O4‐MnO2 nanocomposites biosynthesized by cell lysate of Haloferax alexandrinus GUSF‐1

Synthesis and Electrochemical Properties of One‐Dimensional γ‐MnOOH Nanorods

Study on Electrochemical Performance of MnO@rGO/Carbon Fabric-Based Wearable Supercapacitors

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Characterization of Mn₃O₄‐MnO₂ nanocomposites biosynthesized by cell lysate of Haloferax alexandrinus GUSF‐1

Characterization of Mn₃O₄‐MnO₂ nanocomposites biosynthesized by cell lysate of Haloferax alexandrinus GUSF‐1