Self-assembled porous MoO2/graphene microspheres towards high performance anodes for lithium ion batteries

Palanisamy, Kowsalya; Kim, Yunok; Kim, Hansu; Kim, Ji Man; Yoon, Won‐Sub

doi:10.1016/j.jpowsour.2014.11.001

Cited by 134 publications

(78 citation statements)

References 50 publications

(51 reference statements)

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“…The capacity of the pure MoO 2 particle baseline displays a continuous decrease to 356 mAh g −1 until the 17th cycle then gradually increase afterward, the capacity reaches to 470 mAh g −1 at the 100th cycle, which is consistent with MoO 2 with the size in microscale. [25,26] As we have already discussed above, the micrometer MoO 2 /GO also exhibits an induced activation process. The discharge capacity of the micrometer MoO 2 /GO decreases to 801 mAh g −1 at the 7th cycle then continuously increases to 901 mAh g −1 at the 100th cycle.…”

Section: Resultsmentioning

confidence: 65%

“…[ 26] As to the MoO 2 / GO nanohoneycomb electrodes, it can deliver a capacity as high as 461 mAh g −1 at a much higher current density of 5000 mA g −1 .…”

Section: Resultsmentioning

confidence: 99%

“…However, owing to graphene being liable to stack together, it is difficult to prepare well distributed graphene templated metal oxide architectures. The strategies, including solid-state graphenothermal reduction method, [25] microwave-assisted hydrothermal process, [26] and soft-templated hydrothermal method, [27] have been used to synthesize MoO 2 /C nanocomposites, exhibiting promising performance for LIBs. In our present …”

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confidence: 99%

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Constructing MoO₂ Porous Architectures Using Graphene Oxide Flexible Supports for Lithium Ion Battery Anodes

Yao

et al. 2017

Global Challenges

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the theoretical capacity of graphite electrodes is 372 mAh g −1 , resulted in an obstacle for their potential applications. The strategies to develop alternative anode materials with improved capacity have been achieved for several decades. [1][2][3][4][5][6][7][8] Among them, nanoscale metal oxides, including MnO, [9] SnO 2 , [10,11] Co 3 O 4 , [12] NiO, [13] and Fe 3 O 4 , [14,15] used as anode active materials for LIBs have been paid much attention attributed to their promising theoretical capacity. However, in most cases, the capacity decays rapidly as cycled due to high electrical resistivity and mechanism failure. [16] Molybdenum oxide (MoO 2 ) is different from other metal oxides. It possesses metallic conductivity (its electrical resistivity is 8.8 × 10 −5 Ω cm at 300 K in bulk sample), with a theoretical capacity as high as 836 mAh g −1 . [17] However, the capacity of bulk MoO 2 is low due to sluggish lithiation/delithiation kinetics. [17][18][19][20] On the other hand, the nanoporous structure constructed with lots of interconnect nanounits to form numbers of nanoscale pore provides adequate spaces for electrochemical reaction and connected pathways for ion diffusion. [21,22] The nano-MoO 2 porous structures have been synthesized by using mesoporous silica as hard templates, followed removing this hard templates by hydrofluoric acid, [23] or by a sulfur-assisted decomposition process. [24] The prepared MoO 2 porous materials have displayed improved capacity for LIBs. However, the capacity fade after charge/discharge process is attributed to the pure MoO 2 skeleton that will be possibly collapsed. The cycle stability needs to be improved further. It should be desired for the MoO 2 porous structure with flexible supports via retarding the pulverization from pure MoO 2 skeleton.Carbon nanomaterials, especially, graphene with large specific surface area and high toughness, are suitable for both substrates and supports for MoO 2 electrode active materials. However, owing to graphene being liable to stack together, it is difficult to prepare well distributed graphene templated metal oxide architectures. The strategies, including solid-state graphenothermal reduction method, [25] microwave-assisted hydrothermal process, [26] and soft-templated hydrothermal method, [27] have been used to synthesize MoO 2 /C nanocomposites, exhibiting promising performance for LIBs. In our present

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Section: Resultsmentioning

confidence: 65%

“…[ 26] As to the MoO 2 / GO nanohoneycomb electrodes, it can deliver a capacity as high as 461 mAh g −1 at a much higher current density of 5000 mA g −1 .…”

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Constructing MoO₂ Porous Architectures Using Graphene Oxide Flexible Supports for Lithium Ion Battery Anodes

Yao

et al. 2017

Global Challenges

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“…The peaks of Mo 3d could be matched with four components (Fig. 3a), including two peaks at 228.48 and 232.53 eV of Mo 4+ and two peaks at 232.34 and 235.62 eV of Mo 6+ , respectively [27,28], and the presence of Mo 6+ is probably due to the oxidation of superficial MoO 2 in the MoO 2 @NC NFs [10]. The peaks of the C 1s can be divided into four peaks (Fig.…”

Section: Resultsmentioning

confidence: 80%

“…MoO 2 , as a layered transition-metal oxide, has obtained intensive attention due to its good electrical conductivity and high theoretical capacity [7][8][9][10]. However, MoO 2 suffers from mechanical degradation owing to large volume variations during the ion insertion and extraction processes.…”

Section: Introductionmentioning

confidence: 99%

Electrospun MoO2@NC nanofibers with excellent Li+/Na+ storage for dual applications

et al. 2017

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MoO 2 @N-doped C nanofibers (MoO 2 @NC NFs) were synthesized by electrospinning with polyacrylonitrile as carbon source. The in situ formed MoO 2 nanocrystals are completely embedded in the carbon nanofibers, which can not only accelerate ion transition, but also act as a buffer to avoid the mechanical degradation of active material due to the volume changes during charge/discharge cycling. When used as the anode material for both Li/Na-ion batteries, the as-synthesized MoO 2 @NC NFs displayed excellent Li + /Na + storage properties. As the anode for Li-ion battery, the MoO 2 @NC NFs display a high discharge capacity of 930 mA h g −1 at a current density of 200 mA g −1 for 100 cycles, and 720 mA h g −1 at a current density of 1 A g −1 for 600 cycles. Moreover, the discharge capacity of 350 mA h g −1 could be realized at a current density of 100 mA g −1 for 200 cycles for Na-ion battery.

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In Situ Carbon Insertion in Laminated Molybdenum Dioxide by Interlayer Engineering Toward Ultrastable “Rocking‐Chair” Zinc‐Ion Batteries

Wang

Yan

Zhang

et al. 2021

Adv Funct Materials

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Aqueous zinc-ion batteries (ZIBs) have attracted significant attention due to their intrinsic safety, cost-effectiveness, and environmental friendliness. However, the common zinc metal anode suffers from zinc dendrite formation, self-corrosion, and surface passivation, which impede the further application of aqueous ZIBs. Herein, carbon-inserted molybdenum dioxide (MoO 2 ) materials with laminated structure are designed as novel intercalation-type anodes for ZIBs by combination of interlayer engineering and in situ carbonization of aniline guest in molybdenum trioxide interlayers. The uniform dispersion of carbon layers in laminated MoO 2 not only provide fast transportation paths for electron but also strengthen the framework of MoO 2 , leading to high structural integration during high-rate cycling. Benefiting from the unique structural design, the carbon-inserted MoO 2 electrode exhibits high initial Coulombic efficiency, excellent cycling stability, and outstanding rate capability. Multiple ex situ characterizations reveal its excellent electrochemical stability is derived from reversible intercalation mechanism and ultrastable structural framework. Furthermore, the rocking-chair zinc-ion full battery assembled with the zinc pre-intercalated Na 3 V 2 (PO 4 ) 2 O 2 F cathode presents excellent stability and ultralong lifespan with a high capacity retention of 91% over 8000 cycles.

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Self-assembled porous MoO2/graphene microspheres towards high performance anodes for lithium ion batteries

Cited by 134 publications

References 50 publications

Constructing MoO₂ Porous Architectures Using Graphene Oxide Flexible Supports for Lithium Ion Battery Anodes

Constructing MoO₂ Porous Architectures Using Graphene Oxide Flexible Supports for Lithium Ion Battery Anodes

Electrospun MoO2@NC nanofibers with excellent Li+/Na+ storage for dual applications

In Situ Carbon Insertion in Laminated Molybdenum Dioxide by Interlayer Engineering Toward Ultrastable “Rocking‐Chair” Zinc‐Ion Batteries

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Self-assembled porous MoO2/graphene microspheres towards high performance anodes for lithium ion batteries

Cited by 134 publications

References 50 publications

Constructing MoO2 Porous Architectures Using Graphene Oxide Flexible Supports for Lithium Ion Battery Anodes

Constructing MoO2 Porous Architectures Using Graphene Oxide Flexible Supports for Lithium Ion Battery Anodes

Electrospun MoO2@NC nanofibers with excellent Li+/Na+ storage for dual applications

In Situ Carbon Insertion in Laminated Molybdenum Dioxide by Interlayer Engineering Toward Ultrastable “Rocking‐Chair” Zinc‐Ion Batteries

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Constructing MoO₂ Porous Architectures Using Graphene Oxide Flexible Supports for Lithium Ion Battery Anodes

Constructing MoO₂ Porous Architectures Using Graphene Oxide Flexible Supports for Lithium Ion Battery Anodes