PVP incorporated MoS                         2                          as a Mg ion host with enhanced capacity and durability

Canlong Wu; Guangyu Zhao; Shan Gong; Naiqing Zhang; Kening Sun

doi:10.1039/c8ta12288a

PVP incorporated MoS ₂ as a Mg ion host with enhanced capacity and durability

Canlong Wu, Guangyu Zhao^*, Shan Gong, Naiqing Zhang, Kening Sun

^*Corresponding author for this work

Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

44 Citations (Scopus)

Abstract

MoS ₂ with enlarged interlayer spacing exhibits high Mg-ion storage capacity due to the accelerated kinetics of Mg ²⁺ , however, continuous decay of capacity occurs during the charge/discharge process, and the exfoliation of MoS ₂ monolayers is observed because of the weakened van der Waal's interaction in MoS ₂ interlayers. In the present study, PVP-MoS ₂ nanospheres with an interlayer spacing of 0.97 nm are synthesized by a hydrothermal method, and employed as Mg-ion hosts. The characterization of MoS ₂ interlayers indicates that PVP is incorporated between MoS ₂ monolayers, and the former interacts with the latter to sustain the layered structure of nanospheres. PVP-MoS ₂ shows a capacity of 143.4 mA h g ^-1 at a current density of 20 mA g ^-1 , and retains 92% of the capacity after 100 cycles due to its strong structural stability. This study provides a feasible approach to prepare MoS ₂ hosts with enhanced capacity and durability.

Original language	English
Pages (from-to)	4426-4430
Number of pages	5
Journal	Journal of Materials Chemistry A
Volume	7
Issue number	9
DOIs	https://doi.org/10.1039/c8ta12288a
Publication status	Published - 2019
Externally published	Yes

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@article{53086ca137af43ee8ded06cccbd92072,

title = " PVP incorporated MoS 2 as a Mg ion host with enhanced capacity and durability ",

abstract = " MoS 2 with enlarged interlayer spacing exhibits high Mg-ion storage capacity due to the accelerated kinetics of Mg 2+ , however, continuous decay of capacity occurs during the charge/discharge process, and the exfoliation of MoS 2 monolayers is observed because of the weakened van der Waal's interaction in MoS 2 interlayers. In the present study, PVP-MoS 2 nanospheres with an interlayer spacing of 0.97 nm are synthesized by a hydrothermal method, and employed as Mg-ion hosts. The characterization of MoS 2 interlayers indicates that PVP is incorporated between MoS 2 monolayers, and the former interacts with the latter to sustain the layered structure of nanospheres. PVP-MoS 2 shows a capacity of 143.4 mA h g -1 at a current density of 20 mA g -1 , and retains 92% of the capacity after 100 cycles due to its strong structural stability. This study provides a feasible approach to prepare MoS 2 hosts with enhanced capacity and durability.",

author = "Canlong Wu and Guangyu Zhao and Shan Gong and Naiqing Zhang and Kening Sun",

note = "Publisher Copyright: {\textcopyright} 2019 The Royal Society of Chemistry.",

year = "2019",

doi = "10.1039/c8ta12288a",

language = "English",

volume = "7",

pages = "4426--4430",

journal = "Journal of Materials Chemistry A",

issn = "2050-7488",

publisher = "Royal Society of Chemistry",

number = "9",

}

TY - JOUR

T1 - PVP incorporated MoS 2 as a Mg ion host with enhanced capacity and durability

AU - Wu, Canlong

AU - Zhao, Guangyu

AU - Gong, Shan

AU - Zhang, Naiqing

AU - Sun, Kening

PY - 2019

Y1 - 2019

N2 - MoS 2 with enlarged interlayer spacing exhibits high Mg-ion storage capacity due to the accelerated kinetics of Mg 2+ , however, continuous decay of capacity occurs during the charge/discharge process, and the exfoliation of MoS 2 monolayers is observed because of the weakened van der Waal's interaction in MoS 2 interlayers. In the present study, PVP-MoS 2 nanospheres with an interlayer spacing of 0.97 nm are synthesized by a hydrothermal method, and employed as Mg-ion hosts. The characterization of MoS 2 interlayers indicates that PVP is incorporated between MoS 2 monolayers, and the former interacts with the latter to sustain the layered structure of nanospheres. PVP-MoS 2 shows a capacity of 143.4 mA h g -1 at a current density of 20 mA g -1 , and retains 92% of the capacity after 100 cycles due to its strong structural stability. This study provides a feasible approach to prepare MoS 2 hosts with enhanced capacity and durability.

AB - MoS 2 with enlarged interlayer spacing exhibits high Mg-ion storage capacity due to the accelerated kinetics of Mg 2+ , however, continuous decay of capacity occurs during the charge/discharge process, and the exfoliation of MoS 2 monolayers is observed because of the weakened van der Waal's interaction in MoS 2 interlayers. In the present study, PVP-MoS 2 nanospheres with an interlayer spacing of 0.97 nm are synthesized by a hydrothermal method, and employed as Mg-ion hosts. The characterization of MoS 2 interlayers indicates that PVP is incorporated between MoS 2 monolayers, and the former interacts with the latter to sustain the layered structure of nanospheres. PVP-MoS 2 shows a capacity of 143.4 mA h g -1 at a current density of 20 mA g -1 , and retains 92% of the capacity after 100 cycles due to its strong structural stability. This study provides a feasible approach to prepare MoS 2 hosts with enhanced capacity and durability.

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U2 - 10.1039/c8ta12288a

DO - 10.1039/c8ta12288a

M3 - Article

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SN - 2050-7488

VL - 7

SP - 4426

EP - 4430

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 9

ER -

PVP incorporated MoS ₂ as a Mg ion host with enhanced capacity and durability

Abstract

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