Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 5, Issue 3, Pages 1003-1008Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am3026954
Keywords
hierarchical surface; hollow structure; layered compounds; nanomaterials; lithium secondary batteries; solvothermal reaction
Funding
- 973 Project of China [2011CB935901]
- Natural Science Foundation of China [91022033, 21071055, 51172076, 21203111]
- New Century Excellent Talents in University [NCET-10-0369]
- Shandong Provincial Natural Science Foundation for Distinguished Young Scholar [JQ201205]
- Independent Innovation Foundations of Shandong University [2012 ZD007]
- New Faculty Start-up funding in Shandong University
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MoS2, because of its layered structure and high theoretical capacity, has been regarded as a potential candidate for electrode materials in lithium secondary batteries. But it suffers from the poor cycling stability and low rate capability. Here, hierarchical hollow nanoparticles of MoS2 nanosheets with an increased interlayer distance are synthesized by a simple solvothermal reaction at a low temperature. The formation of hierarchical hollow nanoparticles is based on the intermediate, K2NaMoO3F3, as a self-sacrificed template. These hollow nanoparticles exhibit a reversible capacity of 902 mA h g(-1) at 100 mA g(-1) after 80 cycles, much higher than the solid counterpart. At a current density of 1000 mA g(-1), the reversible capacity of the hierarchical hollow nanoparticles could be still maintained at 780 mAh g(-1). The enhanced lithium storage performances of the hierarchical hollow nanoparticles in reversible capacities, cycling stability and rate performances can be attributed to their hierarchical surface, hollow structure feature and increased layer distance of S-Mo-S. Hierarchical hollow nanoparticles as an ensemble of these features, could be applied to other electrode materials for the superior electrochemical performance.
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