Honeycomb-Spherical Co3O4-TiO2 Hybrid Materials for Enhanced Lithium Storage
| Autor: | Mingna Liao, Xuexue Pan, Linyin Tan, Kaina Shang, Youpeng Li, Lingzhi Zhao, Lei Jianfei, Wenjie Zhou |
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| Rok vydání: | 2016 |
| Předmět: |
Nanocomposite
Materials science General Chemical Engineering chemistry.chemical_element Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry Microstructure 01 natural sciences 0104 chemical sciences Anode chemistry Chemical engineering Electrode Lithium Graphite 0210 nano-technology Hybrid material |
| Zdroj: | Electrochimica Acta. 222:1642-1649 |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2016.11.153 |
| Popis: | This work introduces an effective, inexpensive and large-scale production route to the fabrication of a novel honeycomb-spherical Co3O4-TiO2 nanocomposite anode material for use in rechargeable lithium ion batteries. The microstructure and phase composition of the Co3O4-TiO2 product were characterized systematically. The Co3O4-TiO2 nanocomposite electrode yielded fairly high reversible capacity of ∼1000 mAh/g at 200 mA/g after 100 cycles. Moreover, the electrode exhibited extraordinary rate ability and could regain its original specific capaities as reversing to the low current densities. Meanwhile, when being applied as anode material in full cells, it still achieved remarkably improved electrochemical performance compared with traditional graphite material. Noticeably, in-situ XRD measurement verified the conversion mechanism for the Co3O4-TiO2 electrode. The likely contributing factors to these outstanding electrochemical properties of the Co3O4-TiO2 nanocomposite could be related to the distinctive morphology including interlaced Co3O4 nanoflakes (NFs) and the TiO2 nanoparticles (NPs), which contains superior structural stability and allows more channels for the Li+ insertion/extraction reaction. This research shows that the as-prepared Co3O4-TiO2 nanocomposite could be suitable for use as a favorable cycle performance anode material for lithium ion batteries. |
| Databáze: | OpenAIRE |
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