Controllable growth of hierarchical MoSe2 hollow microspheres for enhanced sodium storage
| Autor: | Zhenguo Ji, G.X. Pan, Qinqin Xiong, Zexing Xue, Xiaoxiao Lu, Xiaojing Teng, Hongzhong Chi |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Mechanical Engineering chemistry.chemical_element 02 engineering and technology Electrolyte Penetration (firestop) 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Hydrothermal circulation 0104 chemical sciences Anode chemistry.chemical_compound Transition metal chemistry Chemical engineering Mechanics of Materials Molybdenum Selenide General Materials Science 0210 nano-technology Current density |
| Zdroj: | Materials Letters. 265:127403 |
| ISSN: | 0167-577X |
| Popis: | Molybdenum selenide has attracted considerable attention for sodium-ion batteries (SIBs) due to its excellent reactivity and large capacity compared to other transition metal dichalcogenides (TMDs). Herein, a facile template-free hydrothermal process is conducted to synthesize hierarchical MoSe2 hollow microspheres with the diameters of ~1.5 μm. The as-prepared MoSe2 hollow microspheres consist of cross-linked nanosheets. As an anode of SIBs, the hierarchical MoSe2 hollow microspheres exhibit a high initial discharge capacity of 710.2 mAh g−1. When the current density is as high as 1000 mA g−1, the specific capacity can still maintain at 290 mAh g−1. The excellent cycling performance and rate capability are due to the hollow microspherical architecture, which shortens the diffusion length of Na+, promotes the penetration of electrolyte into active materials and accommodates the volume stress. It is a successful case to obtain hollow architectures to shed some lights on the high-performance SIBs. |
| Databáze: | OpenAIRE |
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