Hydrodynamic force-induced rapid assembly of mesoporous MnO/C hollow microtube as an anode material for lithium-ion batteries
| Autor: | Yun-Fei Long, Hang Yu, Jing Su, Yanxuan Wen, Xiao-Yan Lv, Yan-Jie Huang, Ya-Nan Zhang, Jian-Fang Lu, Yang Yang, Huang Yun |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Process Chemistry and Technology chemistry.chemical_element Sintering 02 engineering and technology Conductivity 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Anode chemistry Chemical engineering 0103 physical sciences Electrode Materials Chemistry Ceramics and Composites Lithium Microreactor 0210 nano-technology Porosity Mesoporous material |
| Zdroj: | Ceramics International. 45:22281-22291 |
| ISSN: | 0272-8842 |
| Popis: | MnO is a promising anode material for LIBs due to its low cost and high theoretical capacity, but large volume changes and low conductivity limit its application. To improve its conductivity and electron transport rate, we fabricated mesoporous MnO/C hollow microtube through a hydrodynamic force-induced rapid assembly in T-type microchannel reactor followed with a sintering process. The as-synthesized mesoporous MnO/C hollow microtube is consist of MnO nanograins with abundant porous reaction sites embedding uniformly on carbon layers to form a hollow tubular-like structure. When used this mesoporous MnO/C hollow microtube as an anode material of LIBs, it can deliver a high reversible capacity of 845 mAh·g−1 after 100 cycles at 1.5 A g−1 and a capacity of 699 mAh·g−1 at 3.75 A g−1, exhibiting good rate capability and cycle stability. The temperature-dependence electrochemical impedance spectra showed that the mesoporous hollow microtube structure can decrease the barrier energy for jumping through the SEI film, the intercalation reaction and the diffusion of Li+ in the bulk of the solid. The improved performances can be attributed to the unique mesoporous hollow-tubular structure, which enhances the structural stability, improves the electrical conductivity and fasten electrode reaction kinetics. |
| Databáze: | OpenAIRE |
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