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Facile Synthesis of Molybdenum Disulfide Nanosheets/Nitrogen‐Doped Porous Carbon Composites for High‐Performance Anode Material in Lithium‐Ion Batteries
Author(s) -
Guo Shuainan,
Zhang Qian,
Zhu Zhixin,
Xie Jiawei,
Fan Jinchen,
Xu Qunjie,
Shi Penghui,
Min Yulin
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201700176
Subject(s) - materials science , molybdenum disulfide , anode , carbonization , exfoliation joint , lithium (medication) , composite material , carbon fibers , porosity , chemical engineering , molybdenum , composite number , graphene , nanotechnology , electrode , scanning electron microscope , metallurgy , chemistry , endocrinology , engineering , medicine
A facile strategy to prepare MoS 2 nanosheets/nitrogen‐doped porous carbon (MoS 2 /NDPC) composites is designed based on liquid‐phase exfoliation (LPE). For preparation of MoS 2 /NDPC, chitosan (CS) is not only served as a good medium for LPE of MoS 2 , but also acted as carbon sources for creating NDPC matrix. Through CS‐assisted LPE of MoS 2 , the obtained CS‐stabilized MoS 2 nanosheets dispersion is further lyophilized into the CS/MoS 2 nanosheets foams. By carbonization of CS/MoS 2 nanosheets foams, the MoS 2 /NDPC composites with MoS 2 nanosheets embedded in the NDPC are successfully derived. The obtained MoS 2 /NDPC composites can facilitate fast Li‐ion transport and the NDPC enhance the electronic conductivity and retain the structure integrity. Therefore, the MoS 2 /NDPC composites can be used as high‐performance anode material in Lithium‐ion batteries, and exhibit outstanding long‐life cycling capability at high rates, namely, a specific capacity as large as 1260 mA h g −1 at 0.1 A g −1 and 434 mA h g −1 at 10 A g −1 after 50 cycles. At a current density of 5 A g −1 , the MoS 2 /NDPC composites still show a high discharge capacity of ∼ 496 mA h g −1 after 1000 cycles.