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Carbon Nanorod−MoS 2 Core−Sheath Heterostructure and Its Electrochemical Properties over Various Electrochemical Windows
Author(s) -
Wu Manman,
Liu Cong,
Xu Hui,
Shen Jiandong,
Yang Yang,
Yang Gang
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.201800096
Subject(s) - nanorod , materials science , electrochemistry , carbon fibers , heterojunction , chemical engineering , lithium (medication) , electrode , intercalation (chemistry) , hydrothermal circulation , nanotechnology , composite number , inorganic chemistry , optoelectronics , composite material , chemistry , medicine , endocrinology , engineering
The powder of a carbon nanorod−MoS 2 core−sheath heterostructure is successfully synthesized by using a hydrothermal method. The carbon nanorod−MoS 2 material is composed of hierarchical MoS 2 nanosheets tightly grown on carbon nanorods, in which the carbon nanorods as a template effectively reduce the aggregation of the MoS 2 nanosheets. The electrochemical properties of the carbon nanorod−MoS 2 composite electrode are studied in detail, as the intercalation of lithium into MoS 2 includes two significant changes in lithiation mechanism, which occur over various electrochemical windows, such as from 1.0 to 3.0 V and from 0.001 to 3.0 V. The former mainly corresponds to the intercalation/extraction of lithium cations, and thus it presents excellent cyclic stability but low specific capacity. The later causes a big phase change in the final Li‐Sulfur battery system, and thus delivers a high specific capacity but is accompanied by serious pulverization and consequential fast capacity fading. MoS 2 supported by carbon nanorods presents a better electrochemical performance than the pure MoS 2 sample over various electrochemical windows.