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Dopamine Self‐Polymerization Enables an N‐Doped Carbon Coating of Exfoliated MoS 2 Nanoflakes for Anodes of Lithium‐Ion Batteries
Author(s) -
Zhao Hang,
Li Jianlong,
Wu Hao,
Dong Tiange,
Zhang Yun,
Liu Heng
Publication year - 2018
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201700842
Subject(s) - anode , materials science , exfoliation joint , carbonization , coating , lithium (medication) , chemical engineering , electrochemistry , graphite , carbon fibers , molybdenum disulfide , electrode , inorganic chemistry , nanotechnology , graphene , composite material , composite number , chemistry , scanning electron microscope , endocrinology , engineering , medicine
The molybdenum sulfide has a layered structure, similar to graphite, and delivers a good transfer channel for lithium ions as an anode. To enhance the discharge capacity and cycling stability of the molybdenum sulfide, exfoliated MoS 2 nanoflakes with a N‐doped carbon coating were prepared by exfoliation of bulk MoS 2 and carbonization of a polydopamine coating. The morphological characteristics show that the carbonized polydopamine was coated on the surface of MoS 2 nanoflakes successfully. Consequently, as‐prepared E‐MoS 2 @NC delivers a good electrochemical performance and cycling stability as the anode for lithium‐ion batteries; the reversible lithium storage capacity was up to 650 mAh g −1 at a current density of 0.2 A g −1 , and the discharge specific capacity was stabilized at 562 mAh g −1 even after 200 cycles at a current density of 0.5 A g −1 .