Open AccessConstruction of Hierarchical Hollow MoS2/Carbon Microspheres for Enhanced Lithium Storage Performance
Author(s) -
Suning Gao,
Liangtao Yang,
Jie Shao,
Qunting Qu,
Yuping Wu,
Rudolf Holze
Publication year - 2020
Publication title -
journal of the electrochemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.258
H-Index - 271
eISSN - 1945-7111
pISSN - 0013-4651
DOI - 10.1149/1945-7111/ab98b0
Subject(s) - materials science , x ray photoelectron spectroscopy , gravimetric analysis , high resolution transmission electron microscopy , carbon fibers , lithium (medication) , chemical engineering , electrode , mesoporous material , raman spectroscopy , nanotechnology , electrochemistry , composite material , composite number , chemistry , transmission electron microscopy , catalysis , organic chemistry , medicine , physics , optics , endocrinology , engineering
Hierarchical C@MoS 2 hollow spheres assembled from few layer-MoS 2 nanosheets coated on both interior and exterior surfaces of hollow carbon spheres (HCSs) have been developed by a modified template method. The polydopamine-derived carbon shell functions as a support with a negatively charged surface resulting in the in situ growth of few layer-MoS 2 nanosheets and prevents them from agglomeration with an integrated structure. In addition, the hollow carbon spheres with their mesopores provide sufficient liquid-solid contact area and shorter electron and ion pathways, as well as buffer for volume changes occurring during the charge/discharge process. The prepared C@MoS 2 material is characterized by XRD, TGA, BET, Raman, SEM, HRTEM and XPS measurements. When applied as a negative electrode material in LIBs, the C@MoS 2 electrode exhibits high reversible gravimetric capacity (1100 mAh·g −1 at 0.1 C), superior rate performance (633 mAh·g −1 at 20.0 C) and superb cycling life (86.0% of its original specific capacity left after 130 cycles).