Journal
APPLIED SURFACE SCIENCE
Volume 434, Issue -, Pages 1021-1029Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.11.018
Keywords
Molybdenum disulfide; Nanospheres; Carbon surface; Yolk-shell structure; Lithium-ion batteries
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Funding
- National Science Foundation of China [61574055, 61474043, 61227902]
- Open Project Program of Key Laboratory of Polar Materials and Devices, MOE [KFKT20140003]
- ECNU Outstanding Doctoral Dissertation Cultivation Plan of Action [YB2016032]
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Molybdenum disulfide is regarded as one of the most promising electrode materials for high performance lithium-ion batteries. Designing firm basal structure is a key point to fully utilize the high capacity of layered MoS2 nanomaterials. Here, yolk-shell structured MoS2 nanospheres is firstly designed and fabricated to meet this needs. This unique yolk-shell nanospheres are transformed from solid nanospheres by a simply weak alkaline etching method. Then, the yolk-shell MoS2/C is synthesized by a facile process to protect the outside MoS2 shell and promote the conductivity. Taking advantages of high capacity and well-defined cavity space, allowing the core MoS2 to expand freely without breaking the outer shells, yolk-shell MoS2/C nanospheres delivers long cycle life (94% of capacity retained after 200 cycles) and high rate behaviour (830 mA h g(-1) at 5 A g(-1)). This design of yolk-shell structure may set up a new strategy for preparing next generation anode materials for LIBs. (C) 2017 Elsevier B.V. All rights reserved.
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