Fabrication of NiO-NiMoO4/PPy microspheres as high-performance anode material for lithium-ion battery
| Autor: | Junhong Zhang, Xiao Han, Haoguo Yue, Yan-Rong Zhu, Jinsheng Zhao, Jie Mei, Yueqiang Ma, Yan-Mei Li |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
General Chemical Engineering Composite number Non-blocking I/O General Engineering General Physics and Astronomy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Lithium-ion battery 0104 chemical sciences Anode law.invention Chemical engineering law General Materials Science Nanorod Calcination In situ polymerization 0210 nano-technology |
| Zdroj: | Ionics. 26:3823-3830 |
| ISSN: | 1862-0760 0947-7047 |
| Popis: | In this work, the spherical NiO-NiMoO4 composite was synthesized by solvothermal route followed by calcination, and then spherical NiO-NiMoO4/PPy composite was synthesized by in situ polymerization of pyrrole monomer. The NiO-NiMoO4 and NiO-NiMoO4/PPy microspheres with a particle size of around 1–2 μm consist of nanorods and nanosheets. Hence, NiO-NiMoO4/PPy anode shows a higher delithiation and lithiation capacities than NiO-NiMoO4 at each rate. At 0.2 A g−1, NiO-NiMoO4 only shows an initial delithiation capacity of ∼775 mAh g−1, and the capacity only keeps 207 mAh g−1 after 160 cycles. Nonetheless, NiO/NiMoO4/PPy shows an initial delithiation capacity of ~ 884 mAh g−1, and the capacity also maintains ~ 846 mAh g−1 even after 160 cycles. The corresponding capacity retention of NiO/NiMoO4/PPy and NiO/NiMoO4 are 95.7% and 26.7%, respectively. The PPy modification is a direct and effective strategy to improve the reversible capacity and cycling performance of NiO-NiMoO4 composite. |
| Databáze: | OpenAIRE |
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