The rational design of hierarchical MoS2 nanosheet hollow spheres sandwiched between carbon and TiO2@graphite as an improved anode for lithium-ion batteries
| Autor: | Maojun Zheng, Li Ma, Faze Wang, Fanggang Li, Yanbo Li |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
General Engineering chemistry.chemical_element Bioengineering General Chemistry Atomic and Molecular Physics and Optics Anode chemistry.chemical_compound Amorphous carbon chemistry Chemical engineering General Materials Science Lithium Graphite Carbon Molybdenum disulfide Faraday efficiency Nanosheet |
| Zdroj: | Nanoscale Advances. 1:1957-1964 |
| ISSN: | 2516-0230 |
| DOI: | 10.1039/c9na00019d |
| Popis: | Molybdenum disulfide (MoS2) shows high capacity but suffers from poor rate capability and rapid capacity decay, which greatly limit its practical applications in lithium-ion batteries. Herein, we successfully prepared MoS2 nanosheet hollow spheres encapsulated into carbon and titanium dioxide@graphite, denoted as TiO2@G@MoS2@C, via hydrothermal and polymerization approaches. In this hierarchical architecture, the MoS2 hollow sphere was sandwiched by graphite and an amorphous carbon shell; thus, TiO2@G@MoS2@C exhibited effectively enhanced electrical conductivity and withstood the volume changes; moreover, the aggregation and diffusion of the MoS2 nanosheets were restricted; this advanced TiO2@G@MoS2@C fully combined the advantages of a three-dimensional architecture, hollow structure, carbon coating, and a mechanically robust TiO2@graphite support, achieving improved specific capacity and long-term cycling stability. In addition, it exhibited the high reversible specific capacity of 823 mA h g−1 at the current density of 0.1 A g−1 after 100 cycles, retaining almost 88% of the initial reversible capacity with the high coulombic efficiency of 99%. |
| Databáze: | OpenAIRE |
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