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Abstract:
Two-dimensional transition metal dichalcogenides, which display considerable theoretical capacity and large layer spacing, have been regarded as promising candidates as anode materials for sodium-ion bat-teries (SIBs). However, their low conductivity and large volume change during charge-discharge cycles leads to performance degradation. Herein, polyvinylpyrrolidone (PVP) is used as a soft template to syn-thesize PVP-derived nitrogen-doped carbon-coated MoS2 composites (MoS2/NC) by a simple hydrother-mal method followed by high-temperature treatment. The as-prepared composite exhibits a flowerball-like morphology and a diameter of approximately 250 nm. The optimized MoS2/NC has the most uniform particle size and provides the best performance, with a stable capacity of 504.9 mAh g-1 after 120 cycles at a current density of 100 mA g-1. It has excellent rate performance, which can reach 524.6, 481.9, 447.7, 412.5, and 370.9 mAh g-1 at current densities of 0.1, 0.2, 0.5, 1 and 2 A g-1, respectively. The small par-ticle size and the addition of carbonaceous materials play an important role in their excellent electro-chemical properties. This study opens up a simple and effective way to synthesize high-performance two-dimensional MoS2 composite anodes for SIBs.(c) 2022 Elsevier Inc. All rights reserved.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN: 0021-9797
Year: 2023
Volume: 630
Page: 786-794
9 . 9 0 0
JCR@2022
ESI Discipline: CHEMISTRY;
ESI HC Threshold:20
Cited Count:
WoS CC Cited Count: 9
SCOPUS Cited Count: 9
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 8
Affiliated Colleges: