One-step extended strategy for the ionic liquid-assisted synthesis of Ni3S4–MoS2heterojunction electrodes for supercapacitors

Luo, Wenhao; Zhang, Guofeng; Cui, Yingxue; Sun, Yan; Qin, Qing; Zhang, Jing; Zheng, Wenjun

doi:10.1039/c7ta02268a

Cited by 112 publications

(50 citation statements)

References 41 publications

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“…First, BMIMSCN can change the reaction path and regulate the reaction rate. As reported by previous study, the BMIMSCN can react with (NH 4 ) 6 Mo 7 O 24 ·4H 2 O to form a rod‐like precursor that composed of [BMIM] 2 Mo 4 O 13 . In our study, when the Ni 2+ and (NH 4 ) 6 Mo 7 O 24 ·4H 2 O added into the solvent of deionized water and BMIMSCN, Ni 2+ may preferentially reacted with SCN − to form NiS, while Mo 7 O 24 6− reacted with BMIM + to form the Mo precursor.…”

Section: Resultssupporting

confidence: 78%

MoS₂/NiS Yolk–Shell Microsphere‐Based Electrodes for Overall Water Splitting and Asymmetric Supercapacitor

Qin

Chen

Tao

et al. 2018

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Rational designing of the composition and structure of electrode material is of great significance for achieving highly efficient energy storage and conversion in electrochemical energy devices. Herein, MoS2/NiS yolk–shell microspheres are successfully synthesized via a facile ionic liquid‐assisted one‐step hydrothermal method. With the favorable interface effect and hollow structure, the electrodes assembled with MoS2/NiS hybrid microspheres present remarkably enhanced electrochemical performance for both overall water splitting and asymmetric supercapacitors. In particular, to deliver a current density of 10 mA cm−2, the MoS2/NiS‐based electrolysis cell for overall water splitting only needs an output voltage of 1.64 V in the alkaline medium, lower than that of Pt/C–IrO2‐based electrolysis cells (1.70 V). As an electrode for supercapacitors, the MoS2/NiS hybrid microspheres exhibit a specific capacitance of 1493 F g−1 at current density of 0.2 A g−1, and remain 1165 F g−1 even at a large current density of 2 A g−1, implying outstanding charge storage capacity and excellent rate performance. The MoS2/NiS‐ and active carbon‐based asymmetric supercapacitor manifests a maximum energy density of 31 Wh kg−1 at a power density of 155.7 W kg−1, and remarkable cycling stability with a capacitance retention of approximately 100% after 10 000 cycles.

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Section: Resultssupporting

confidence: 78%

MoS₂/NiS Yolk–Shell Microsphere‐Based Electrodes for Overall Water Splitting and Asymmetric Supercapacitor

Qin

Chen

Tao

et al. 2018

Small

Self Cite

252

110

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show abstract

“…It has been observed that these devices show a capacity of 985.21 F g −1 at a current density of 1 A g −1 , and it goes down to 573 F g −1 after 20 000 cycles at a current density of 10 A g −1 . Further, with activated carbon electrodes these demonstrated a high energy density of 58.43 W h kg −1 and power density of 385.95 W kg −1 . The core–shells of the NiCo 2 S 4 @ MoS 2 type having the structures of dodecahedrons have been prepared from zeolitic imidazolate frameworks as templates.…”

Section: Applications Of Mos2 For Energy Conversion and Storagementioning

confidence: 99%

Molybdenum Disulphide Heterointerfaces as Potential Materials for Solar Cells, Energy Storage, and Hydrogen Evolution

Naik

Rabinal

2020

Energy Tech

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Molybdenum disulphide (MoS2), an ideal semiconductor, belongs to the group of 40 well‐identified transition metal dichalcogenides. These have unique chemical bonding; in an ideal case they do not feature dangling bonds and hence possess a layered‐like atomic structure, such that strong intraplane and weak interplane bondings exist. Hence, MoS2 can be peeled into a precisely controlled number of layers; the bulk with Eg = 1.2 eV can be reduced to a unit cell‐thick layer (monolayer) with Eg = 1.89 eV. However, in reality, both bulk and monolayers possess many types of atomic defects associated with in‐plane, edge, grain boundaries, etc. As a result, MoS2 exhibits many interesting and tunable optoelectronic properties suitable for a wide range of applications. Interestingly, its basic polyhedral form (MoS6) undergoes a structural change that leads to many polymorphic phases, the three in bulk and the five in monolayer. Theoretical predictions and experimental observations clearly confirm that MoS2 and its interfaces with other materials can be significantly important for energy conversion and storage applications, which are emerging and critically important topics of modern science and society. This Review provides an overview of the past few years of research and developments on these topics.

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“…[57] This outstanding ionic conductivity could be closely associatedw ith the well-designed heterostructures. [23,58] To further analyze the possible lithium storagem echanism for the FeS 2 /MoS 2 electrode during the lithiation andd elithiation processes, ex-situ XRD, HRTEM, and EXAFS were performed. Figures 5a,b [19,59] whereas the MoS 2 phase disappears and Li x MoS 2 with poor crystallinity may be formed as ar esulto ft he lithiation process of MoS 2 (MoS 2 + x Li + + x e À !Li x MoS 2 ).…”

Section: Introductionmentioning

confidence: 99%

Unraveling the Beneficial Microstructure Evolution in Pyrite for Boosted Lithium Storage Performance

Wang

Qin

Jiang

et al. 2020

Chemistry A European J

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Pyrite FeS2 as a high‐capacity electrode material for lithium‐ion batteries (LIBs) is hindered by its unstable cycling performance owing to the large volume change and irreversible phase segregation from coarsening of Fe. Here, the beneficial microstructure evolution in MoS2‐modified FeS2 is unraveled during the cycling process; the microstructure evolution is responsible for its significantly boosted lithium storage performance, making it suitable for use as an anode for LIBs. Specifically, the FeS2/MoS2 displays a long cycle life with a capacity retention of 116 % after 600 cycles at 0.5 A g−1, which is the best among the reported FeS2‐based materials so far. A series of electrochemical tests and structural characterizations substantially revealed that the introduced MoS2 in FeS2 experiences an irreversible electrochemical reaction and thus the in situ formed metallic Mo could act as the conductive buffer layer to accelerate the dynamics of Li+ diffusion and electron transport. More importantly, it can guarantee the highly reversible conversion in lithiated FeS2 by preventing Fe coarsening. This work provides a fundamental understanding and an effective strategy towards the microstructure evolution for boosting lithium storage performances for other metal sulfide‐based materials.

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One-step extended strategy for the ionic liquid-assisted synthesis of Ni₃S₄–MoS₂heterojunction electrodes for supercapacitors

Abstract: A Ni3S4–MoS2 heterojunction was successfully prepared with the assistance of an ionic liquid in one step, and it showed high performance as a supercapacitor electrode. This synthesis strategy can be applied to prepare other MxSy–MoS2 heterojunctions.

Cited by 112 publications

References 41 publications

MoS₂/NiS Yolk–Shell Microsphere‐Based Electrodes for Overall Water Splitting and Asymmetric Supercapacitor

MoS₂/NiS Yolk–Shell Microsphere‐Based Electrodes for Overall Water Splitting and Asymmetric Supercapacitor

Molybdenum Disulphide Heterointerfaces as Potential Materials for Solar Cells, Energy Storage, and Hydrogen Evolution

Unraveling the Beneficial Microstructure Evolution in Pyrite for Boosted Lithium Storage Performance

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One-step extended strategy for the ionic liquid-assisted synthesis of Ni3S4–MoS2heterojunction electrodes for supercapacitors

Abstract: A Ni3S4–MoS2 heterojunction was successfully prepared with the assistance of an ionic liquid in one step, and it showed high performance as a supercapacitor electrode. This synthesis strategy can be applied to prepare other MxSy–MoS2 heterojunctions.

Cited by 112 publications

References 41 publications

MoS2/NiS Yolk–Shell Microsphere‐Based Electrodes for Overall Water Splitting and Asymmetric Supercapacitor

MoS2/NiS Yolk–Shell Microsphere‐Based Electrodes for Overall Water Splitting and Asymmetric Supercapacitor

Molybdenum Disulphide Heterointerfaces as Potential Materials for Solar Cells, Energy Storage, and Hydrogen Evolution

Unraveling the Beneficial Microstructure Evolution in Pyrite for Boosted Lithium Storage Performance

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Product

Resources

About

One-step extended strategy for the ionic liquid-assisted synthesis of Ni₃S₄–MoS₂heterojunction electrodes for supercapacitors

MoS₂/NiS Yolk–Shell Microsphere‐Based Electrodes for Overall Water Splitting and Asymmetric Supercapacitor

MoS₂/NiS Yolk–Shell Microsphere‐Based Electrodes for Overall Water Splitting and Asymmetric Supercapacitor