A simple L-cysteine-assisted method for the growth of MoS 2 nanosheets on carbon nanotubes for high-performance lithium ion batteries

Seung Keun Park, Seung-Ho Yu, Seunghee Woo, Bo Quan, Dong Chan Lee, Min Kun Kim, Yung Eun Sung, Yuanzhe Piao

Research output: Contribution to journalArticle

102 Citations (Scopus)

Abstract

We introduce a simple process to synthesize few-layered MoS 2 nanosheets supported on coaxial carbon nanotubes through an l-cysteine-assisted hydrothermal route, in which l-cysteine, a cheap and ordinary amino acid, plays a fundamental role in controlling the morphology of the hybrid material and the binder to help the growth of MoS 2 nanosheets on the surface of the carbon nanotubes. It is also demonstrated that the polypeptide formed by l-cysteine can be transformed into amorphous carbon by heat treatment under an inert atmosphere. The materials exhibit high capacity and excellent cycling performance when used as anode materials for lithium ion batteries. The specific capacity of a composite with 1:4 molar ratio of MoS 2 to carbon nanotubes is 736.5 mAh g -1 after the first cycle, increased for several initial cycles, and remains at 823.4 mAh g -1 even after 30 cycles, when cycled at a current density of 100 mA g -1 . At a very high current density of 1600 mA g -1 , the material shows a stable capacity of approximately 530 mAh g -1 after 30 cycles. The noteworthy improvement in the electrochemical performance of the material can be attributed to their unique structure and the synergistic effects of amorphous carbon and few-layered MoS 2 .

Original languageEnglish
Pages (from-to)2399-2405
Number of pages7
JournalDalton Transactions
Volume42
Issue number7
DOIs
Publication statusPublished - 2013 Feb 21
Externally publishedYes

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Carbon Nanotubes
Nanosheets
Lithium
Cysteine
Ions
Amorphous carbon
Carbon
Growth
Current density
Atmosphere
Hybrid materials
Electrodes
Hot Temperature
Binders
Amino Acids
Anodes
Peptides
Heat treatment
Lithium-ion batteries
Composite materials

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

A simple L-cysteine-assisted method for the growth of MoS 2 nanosheets on carbon nanotubes for high-performance lithium ion batteries . / Park, Seung Keun; Yu, Seung-Ho; Woo, Seunghee; Quan, Bo; Lee, Dong Chan; Kim, Min Kun; Sung, Yung Eun; Piao, Yuanzhe.

In: Dalton Transactions, Vol. 42, No. 7, 21.02.2013, p. 2399-2405.

Research output: Contribution to journalArticle

Park, Seung Keun ; Yu, Seung-Ho ; Woo, Seunghee ; Quan, Bo ; Lee, Dong Chan ; Kim, Min Kun ; Sung, Yung Eun ; Piao, Yuanzhe. / A simple L-cysteine-assisted method for the growth of MoS 2 nanosheets on carbon nanotubes for high-performance lithium ion batteries In: Dalton Transactions. 2013 ; Vol. 42, No. 7. pp. 2399-2405.
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