Metallic 1T phase MoS2 nanosheets as supercapacitor electrode materials

Muharrem Acerce, Damien Voiry, Manish Chhowalla

Research output: Contribution to journalArticle

907 Citations (Scopus)

Abstract

Efficient intercalation of ions in layered materials forms the basis of electrochemical energy storage devices such as batteries and capacitors. Recent research has focused on the exfoliation of layered materials and then restacking the two-dimensional exfoliated nanosheets to form electrodes with enhanced electrochemical response. Here, we show that chemically exfoliated nanosheets of MoS2 containing a high concentration of the metallic 1T phase can electrochemically intercalate ions such as H+, Li+, Na+ and K+ with extraordinary efficiency and achieve capacitance values ranging from ∼400 to ∼700 F cm-3 in a variety of aqueous electrolytes. We also demonstrate that this material is suitable for high-voltage (3.5 V) operation in non-aqueous organic electrolytes, showing prime volumetric energy and power density values, coulombic efficiencies in excess of 95%, and stability over 5,000 cycles. As we show by X-ray diffraction analysis, these favourable electrochemical properties of 1T MoS2 layers are mainly a result of their hydrophilicity and high electrical conductivity, as well as the ability of the exfoliated layers to dynamically expand and intercalate the various ions.

Original languageEnglish
Pages (from-to)313-318
Number of pages6
JournalNature Nanotechnology
Volume10
Issue number4
DOIs
Publication statusPublished - Apr 9 2015

Fingerprint

Nanosheets
electrochemical capacitors
electrode materials
Ions
Electrolytes
Electrodes
electrolytes
ions
Hydrophilicity
energy storage
Intercalation
Electrochemical properties
intercalation
Energy storage
X ray diffraction analysis
electric batteries
radiant flux density
high voltages
capacitors
Capacitors

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering
  • Materials Science(all)
  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics

Cite this

Metallic 1T phase MoS2 nanosheets as supercapacitor electrode materials. / Acerce, Muharrem; Voiry, Damien; Chhowalla, Manish.

In: Nature Nanotechnology, Vol. 10, No. 4, 09.04.2015, p. 313-318.

Research output: Contribution to journalArticle

Acerce, Muharrem ; Voiry, Damien ; Chhowalla, Manish. / Metallic 1T phase MoS2 nanosheets as supercapacitor electrode materials. In: Nature Nanotechnology. 2015 ; Vol. 10, No. 4. pp. 313-318.
@article{303501aa72ab45f3b313b54a265468e9,
title = "Metallic 1T phase MoS2 nanosheets as supercapacitor electrode materials",
abstract = "Efficient intercalation of ions in layered materials forms the basis of electrochemical energy storage devices such as batteries and capacitors. Recent research has focused on the exfoliation of layered materials and then restacking the two-dimensional exfoliated nanosheets to form electrodes with enhanced electrochemical response. Here, we show that chemically exfoliated nanosheets of MoS2 containing a high concentration of the metallic 1T phase can electrochemically intercalate ions such as H+, Li+, Na+ and K+ with extraordinary efficiency and achieve capacitance values ranging from ∼400 to ∼700 F cm-3 in a variety of aqueous electrolytes. We also demonstrate that this material is suitable for high-voltage (3.5 V) operation in non-aqueous organic electrolytes, showing prime volumetric energy and power density values, coulombic efficiencies in excess of 95{\%}, and stability over 5,000 cycles. As we show by X-ray diffraction analysis, these favourable electrochemical properties of 1T MoS2 layers are mainly a result of their hydrophilicity and high electrical conductivity, as well as the ability of the exfoliated layers to dynamically expand and intercalate the various ions.",
author = "Muharrem Acerce and Damien Voiry and Manish Chhowalla",
year = "2015",
month = "4",
day = "9",
doi = "10.1038/nnano.2015.40",
language = "English",
volume = "10",
pages = "313--318",
journal = "Nature Nanotechnology",
issn = "1748-3387",
publisher = "Nature Publishing Group",
number = "4",

}

TY - JOUR

T1 - Metallic 1T phase MoS2 nanosheets as supercapacitor electrode materials

AU - Acerce, Muharrem

AU - Voiry, Damien

AU - Chhowalla, Manish

PY - 2015/4/9

Y1 - 2015/4/9

N2 - Efficient intercalation of ions in layered materials forms the basis of electrochemical energy storage devices such as batteries and capacitors. Recent research has focused on the exfoliation of layered materials and then restacking the two-dimensional exfoliated nanosheets to form electrodes with enhanced electrochemical response. Here, we show that chemically exfoliated nanosheets of MoS2 containing a high concentration of the metallic 1T phase can electrochemically intercalate ions such as H+, Li+, Na+ and K+ with extraordinary efficiency and achieve capacitance values ranging from ∼400 to ∼700 F cm-3 in a variety of aqueous electrolytes. We also demonstrate that this material is suitable for high-voltage (3.5 V) operation in non-aqueous organic electrolytes, showing prime volumetric energy and power density values, coulombic efficiencies in excess of 95%, and stability over 5,000 cycles. As we show by X-ray diffraction analysis, these favourable electrochemical properties of 1T MoS2 layers are mainly a result of their hydrophilicity and high electrical conductivity, as well as the ability of the exfoliated layers to dynamically expand and intercalate the various ions.

AB - Efficient intercalation of ions in layered materials forms the basis of electrochemical energy storage devices such as batteries and capacitors. Recent research has focused on the exfoliation of layered materials and then restacking the two-dimensional exfoliated nanosheets to form electrodes with enhanced electrochemical response. Here, we show that chemically exfoliated nanosheets of MoS2 containing a high concentration of the metallic 1T phase can electrochemically intercalate ions such as H+, Li+, Na+ and K+ with extraordinary efficiency and achieve capacitance values ranging from ∼400 to ∼700 F cm-3 in a variety of aqueous electrolytes. We also demonstrate that this material is suitable for high-voltage (3.5 V) operation in non-aqueous organic electrolytes, showing prime volumetric energy and power density values, coulombic efficiencies in excess of 95%, and stability over 5,000 cycles. As we show by X-ray diffraction analysis, these favourable electrochemical properties of 1T MoS2 layers are mainly a result of their hydrophilicity and high electrical conductivity, as well as the ability of the exfoliated layers to dynamically expand and intercalate the various ions.

UR - http://www.scopus.com/inward/record.url?scp=84927176666&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84927176666&partnerID=8YFLogxK

U2 - 10.1038/nnano.2015.40

DO - 10.1038/nnano.2015.40

M3 - Article

VL - 10

SP - 313

EP - 318

JO - Nature Nanotechnology

JF - Nature Nanotechnology

SN - 1748-3387

IS - 4

ER -