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Xiong, Q.Q.; Xue, Z.X.; Teng, X.J.; Chi, H.Z.; Lu, X.X.; Pan, G.X.; Ji, Z.G.
Materials letters, 04/2020, Volume: 265Journal Article
•We prepared MoSe2 hollow microspheres by template-free hydrothermal process.•The MoSe2 hollow microspheres consist of nanosheets with diameters of ~1.5 μm.•The MoSe2 electrode achieves excellent Na+ storage performance as an anode for NIBs. 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.
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