Ultrathin few-layered molybdenum selenide/graphene hybrid with superior electrochemical Li-storage performance

Ma, Lin; Zhou, Xiaoping; Xu, Limei; Xu, Xuyao; Zhang, Lingling; Chen, Weixiang

doi:10.1016/j.jpowsour.2015.03.120

Cited by 82 publications

(36 citation statements)

References 51 publications

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“…The first discharge and charge capacities are 723 and 539 mA h g −1 for MoSe 2 , and 1060 and 713 mA h g −1 for MoSe 2 /rGO composite, with a Coulombic efficiency of 74 % and 67 %, respectively. It is unusual behavior that the initial Coulombic efficiency of the MoSe 2 /rGO composite is lower than the bare MoSe 2 , although this phenomenon has also been observed in previous graphene‐based reports . As is well‐known, the formation of solid electrolyte interface film (SEI), some lithium trapping inside the defects structures and other irreversible decomposition reactions usually take responsibility for the low initial Coulombic efficiency of electrodes .…”

Section: Figurementioning

confidence: 76%

Hierarchical MoSe₂ Nanosheets/Reduced Graphene Oxide Composites as Anodes for Lithium‐Ion and Sodium‐Ion Batteries with Enhanced Electrochemical Performance

et al. 2015

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The preparation and electrochemical storage behavior of hierarchical MoSe 2 /reduced graphene oxide (rGO) composites were studied. The preparation was achieved by af acile hydrothermal route. The resultss how that MoSe 2 has ah ighc apacity for lithium ion ands odium ion storagea nd that the incorporation of rGO has further improved the electrochemical property of MoSe 2 effectively.A sa node materials for lithium-ion and sodium-ion batteries, the MoSe 2 /rGO composites demonstrate excellent rate performance andc ycling stability of 917 mA hg À1 after 100 cycles for Li + storage and 430 mA hg À1 after 200 cycles for Na + storage at ac urrent density of 0.5 Ag À1 ,w hich is attributed to the robust hierarchical structure and the synergistic effectsb etween MoSe 2 nanosheets andrGO. Therefore, the electrochemical evaluations suggest that the obtained hierarchical structure MoSe 2 / rGO composites hold great potential as anode materials for lithium-ion ands odium-ion batteries.Considerable attention has focusedo nf undamentalr esearch and technological applications of layered transition metal dichalcogenides (TMDs)d ue to their unique crystal structures and varieties of materialp roperties.[1] In TMDs, the metals and chalcogens which are bonded by strong covalent bonding form the molecular layers,a nd the individual layersa re further stacked together via weak van der Waals interactions. The unique graphene-like layered structures, which allow for the insertion and extractiono favariety of guest speciesb etween the layers, give TMDs significant advantages in the field of reversible energy storage, especially in lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs).[2] In addition, the relatively low operation voltage and high theoretical capacities of TMDs also give them potentiala se lectrode materials in LIBs and SIBs.

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Section: Figurementioning

confidence: 76%

Hierarchical MoSe₂ Nanosheets/Reduced Graphene Oxide Composites as Anodes for Lithium‐Ion and Sodium‐Ion Batteries with Enhanced Electrochemical Performance

et al. 2015

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“…Fig. 38,39 The cycling stabilities of Si nanoparticles, Si/GNSs, Si@u-SiO x @GNSs and Si@t-SiO x @GNSs during charge-discharge between 0.01V-2.5V vs Li/Li + at the current density of 200 mA g -1 are shown in Fig. The weight loss recorded at ~550°C is due to the combustion of GNSs shells in air 50 and the gradually regained mass above 550°C is attributed to the oxidation of Si nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

Direct amination of Si nanoparticles for the preparation of Si@ultrathin SiO_x@graphene nanosheets as high performance lithium-ion battery anodes

et al. 2015

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NH2-termitated Si nanoparticles with an ultrathin silica shell have been efficiently obtained by one-step reaction in ammonia-water-ethanol solution. Graphene nanosheets encapsulated Si @ ultrathin SiOx have been fabricated by selfassembly and thermal treatment. Because of the uniform utrathin SiOx shell and superior GNSs encapsulation structure, this material shows a reversible capacity of 2391.3 mAh g -1 , maintaining 1844.9 mAh g -1 after 50 cycles at the current density of 200 mA g -1 , and good rate and long cycle performance (~700 mAh g -1 at 2000 mA g -1 after 350 cycles) as well.

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“…These results agree well with the MoSe 2 deposited by other techniques. [22][23][24][25][26][27] Conversely, the six-membered cyclic selenide 2 showed poor reaction rate and negligible amount of material was deposited. This is most likely due to its higher chemical stability and thus resulting lower reactivity under the given deposition conditions -flow reactor mode with time-limited contact between the precursor injected in the chamber and the chemisorbed counterpart and kinetically limited reaction Surface characterization using Raman spectroscopy and Xray photoelectron spectroscopy (XPS) was carried out to confirm the chemical composition of the deposited MoSe 2 .…”

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confidence: 99%

Cyclic Silylselenides: Convenient Selenium Precursors for Atomic Layer Deposition

et al. 2020

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Three cyclic silylselenides were prepared in a straightforward manner. Property tuning has been achieved by varying the ring size and the number of embedded selenium atoms. All silylselenides possess improved resistance towards moisture and oxidation as well as high thermal robustness and sufficient volatility with almost zero residues. The six‐membered diselenide proved to be particularly superior Se precursors for atomic layer deposition and allowed facile preparation of MoSe2 layers. Their structure and composition have been investigated by Raman and X‐ray photoelectron spectroscopy as well as scanning electron microscopy revealing vertically aligned flaky shaped nanosheets.

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Ultrathin few-layered molybdenum selenide/graphene hybrid with superior electrochemical Li-storage performance

Cited by 82 publications

References 51 publications

Hierarchical MoSe₂ Nanosheets/Reduced Graphene Oxide Composites as Anodes for Lithium‐Ion and Sodium‐Ion Batteries with Enhanced Electrochemical Performance

Hierarchical MoSe₂ Nanosheets/Reduced Graphene Oxide Composites as Anodes for Lithium‐Ion and Sodium‐Ion Batteries with Enhanced Electrochemical Performance

Direct amination of Si nanoparticles for the preparation of Si@ultrathin SiO_x@graphene nanosheets as high performance lithium-ion battery anodes

Cyclic Silylselenides: Convenient Selenium Precursors for Atomic Layer Deposition

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Ultrathin few-layered molybdenum selenide/graphene hybrid with superior electrochemical Li-storage performance

Cited by 82 publications

References 51 publications

Hierarchical MoSe2 Nanosheets/Reduced Graphene Oxide Composites as Anodes for Lithium‐Ion and Sodium‐Ion Batteries with Enhanced Electrochemical Performance

Hierarchical MoSe2 Nanosheets/Reduced Graphene Oxide Composites as Anodes for Lithium‐Ion and Sodium‐Ion Batteries with Enhanced Electrochemical Performance

Direct amination of Si nanoparticles for the preparation of Si@ultrathin SiOx@graphene nanosheets as high performance lithium-ion battery anodes

Cyclic Silylselenides: Convenient Selenium Precursors for Atomic Layer Deposition

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Hierarchical MoSe₂ Nanosheets/Reduced Graphene Oxide Composites as Anodes for Lithium‐Ion and Sodium‐Ion Batteries with Enhanced Electrochemical Performance

Hierarchical MoSe₂ Nanosheets/Reduced Graphene Oxide Composites as Anodes for Lithium‐Ion and Sodium‐Ion Batteries with Enhanced Electrochemical Performance

Direct amination of Si nanoparticles for the preparation of Si@ultrathin SiO_x@graphene nanosheets as high performance lithium-ion battery anodes