Fabrication of cubic spinel MnCo2O4 nanoparticles embedded in graphene sheets with their improved lithium-ion and sodium-ion storage properties

Chen, Chang; Liu, Borui; Ru, Qiang; Ma, Shaomeng; An, Bonan; Hou, Xianhua; Hu, Shejun

doi:10.1016/j.jpowsour.2016.06.131

Cited by 63 publications

(35 citation statements)

References 87 publications

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“…[44][45][46] In the initial oxidation process, a series of burr peaks located between 1.0 and 2.0 V are related to the oxidation of metallic Mn and Co to Mn 2 + and Co 2 + . [47][48][49] In the subsequent cycles, these peaks all exist and move slightly. The above results indicate that a phase transfer process occurs during the electrode reactions of manganese and cobalt oxide.…”

Section: Resultsmentioning

confidence: 94%

“…The strong peak at 0.01 V corresponds to the lithium intercalation process of carbon materials and to the further reduction of some metal ions into manganese and cobalt . In the initial oxidation process, a series of burr peaks located between 1.0 and 2.0 V are related to the oxidation of metallic Mn and Co to Mn 2+ and Co 2+ . In the subsequent cycles, these peaks all exist and move slightly.…”

Section: Resultsmentioning

confidence: 99%

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Facile Synthesis of Flower‐Like MnCo₂O₄@PANi‐rGO: A High‐Performance Anode Material for Lithium‐Ion Batteries

Huang

Zhu

et al. 2019

ChemPlusChem

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Flower‐like MnCo2O4 was prepared in a self‐assembly process and used in the formation of MnCo2O4@polyaniline (MnCo2O4@PANi) that proceeds by a simple in situ polymerization. The MnCo2O4@PANi‐reduced graphite oxide (MnCo2O4@PANi‐rGO) composite was then synthesized by introducing rGO into MnCo2O4@PANi. This modification improves the overall electronic conductivity of the MnCo2O4@PANi‐rGO because of the dual conductive functions of rGO and PANi; it also provides a buffer for the changes in electrode volume during cycling, thus improving the lithium‐storage performance of MnCo2O4@PANi‐rGO. The electrochemical performance of the samples was evaluated by charge/discharge cycling testing, cyclic voltammetry, and electrochemical impedance spectroscopy. MnCo2O4@PANi‐rGO delivers a discharge capacity of 745 mAh g−1 and a Coulombic efficiency of 100 % after 1050 cycles at a current density of 500 mA g−1, and is a promising anode material for lithium‐ion batteries.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Flower‐Like MnCo₂O₄@PANi‐rGO: A High‐Performance Anode Material for Lithium‐Ion Batteries

Huang

Zhu

et al. 2019

ChemPlusChem

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“…Thus, XPS results confirms the multivalency of MnCo 2 O 4 with both Co 3+ /Co 2+ and Mn 3+ /Mn 2+ valence states. The O 1s XPS spectrum is shown in Figure c, in which the binding energies at 529.7 and 531.4 eV correspond to the M−O bonds: Co−O and Mn−O and the residual oxygen‐containing group O−H, which were present on the surface of graphene . Furthermore, the C 1s spectrum of carbon is given in Figure d, which is deconvoluted into two peaks at 284 and 287 eV, assigned to the C−C and C−O bonds.…”

Section: Resultsmentioning

confidence: 99%

Viable Synthesis of Porous MnCo₂O₄/Graphene Composite by Sonochemical Grafting: A High‐Rate‐Capable Oxygen Cathode for Li–O₂ Batteries

Karkera

Chandrappa

Prakash

2018

Chemistry A European J

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With an anticipation of their use in electric vehicles, Li-O batteries are found to be attractive despite their complex chemistry and drawbacks. To be successful, cathode materials that are robust enough to overcome the sluggish kinetics of the charge-discharge reactions are essential. This work reports sonochemically synthesized porous MnCo O /graphene (MCO/G) as a hybrid cathode material in nonaqueous Li-O batteries. The MCO/G hybrid is synthesized in less than four hours and offers a strong synergistic coupling between the MnCo O nanospheres and graphene sheets. It catalyzes the oxygen reduction through a three-electron-transfer process and initiates the oxygen evolution at 1.55 V vs. RHE in basic medium. A small charge-discharge voltage hysteresis of 0.8 V and a cycle life of 250 cycles at a limited capacity of 1000 mAh g in a tetraglyme-based nonaqueous Li-O battery is demonstrated. The porous channels created on the sonochemically synthesized cathode facilitates easy oxygen adsorption onto the active sites to accommodate more discharge products following its decomposition. It exhibits a better rate capability in comparison to the widely used Vulcan carbon and benchmark Pt/C catalysts. The excellent cyclability, rate capability, and low overpotential demonstrates MnCo O /graphene composite as a promising cathode candidate for Li-O batteries. The porous nanosphere architecture with internal oxygen diffusion pathways and peripheral conductive graphene extensions fulfils the requirements that a robust cathode is expected to have to overcome the harsh Li-O battery conditions and to serve as a high-rate-capable cathode for Li-O batteries.

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“…However, the commercial graphite anode with relatively low theoretical capacity cannot meet the requirement for the next generation of power sources. Recently, spinel binary transition metal oxides AB 2 O 4 including NiFe 2 O 4 , CoFe 2 O 4 , NiCo 2 O 4 , MnCo 2 O 4 , ZnMn 2 O 4 , etc. have attracted wide attention as promising anodes for LIBs since the binary metal oxides exhibit a higher conductivity and better performance compared with the single component oxides.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of erythrocyte like MnCo₂O₄ as anode for high performance lithium ion batteries

Liu

Zhai

Liu

et al. 2017

Crystal Research and Technology

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Erythrocyte like MnCo 2 O 4 has been synthesized using a facile solvothermal method and sintering treatment. The obtained sample is constructed by many smaller nanocrystals and possesses high surface area, which can efficiently increase the contact area for electrode/electrolyte, shorten the pathway for Li + diffusion and buffer the volume variation during electrochemical cycling. Electrochemical investigations demonstrate that the erythrocyte like MnCo 2 O 4 exhibits good electrochemical performance. A specific capacity of 960 mAh g −1 can be achieved after 100 cycles at the current density of 200 mA g −1 .

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Fabrication of cubic spinel MnCo2O4 nanoparticles embedded in graphene sheets with their improved lithium-ion and sodium-ion storage properties

Cited by 63 publications

References 87 publications

Facile Synthesis of Flower‐Like MnCo₂O₄@PANi‐rGO: A High‐Performance Anode Material for Lithium‐Ion Batteries

Facile Synthesis of Flower‐Like MnCo₂O₄@PANi‐rGO: A High‐Performance Anode Material for Lithium‐Ion Batteries

Viable Synthesis of Porous MnCo₂O₄/Graphene Composite by Sonochemical Grafting: A High‐Rate‐Capable Oxygen Cathode for Li–O₂ Batteries

Synthesis of erythrocyte like MnCo₂O₄ as anode for high performance lithium ion batteries

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Fabrication of cubic spinel MnCo2O4 nanoparticles embedded in graphene sheets with their improved lithium-ion and sodium-ion storage properties

Cited by 63 publications

References 87 publications

Facile Synthesis of Flower‐Like MnCo2O4@PANi‐rGO: A High‐Performance Anode Material for Lithium‐Ion Batteries

Facile Synthesis of Flower‐Like MnCo2O4@PANi‐rGO: A High‐Performance Anode Material for Lithium‐Ion Batteries

Viable Synthesis of Porous MnCo2O4/Graphene Composite by Sonochemical Grafting: A High‐Rate‐Capable Oxygen Cathode for Li–O2 Batteries

Synthesis of erythrocyte like MnCo2O4 as anode for high performance lithium ion batteries

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Facile Synthesis of Flower‐Like MnCo₂O₄@PANi‐rGO: A High‐Performance Anode Material for Lithium‐Ion Batteries

Facile Synthesis of Flower‐Like MnCo₂O₄@PANi‐rGO: A High‐Performance Anode Material for Lithium‐Ion Batteries

Viable Synthesis of Porous MnCo₂O₄/Graphene Composite by Sonochemical Grafting: A High‐Rate‐Capable Oxygen Cathode for Li–O₂ Batteries

Synthesis of erythrocyte like MnCo₂O₄ as anode for high performance lithium ion batteries