Nitrogen-doped zinc/cobalt mixed oxide micro-/nanospheres for high-rate lithium-ion battery anode
| Autor: | Junhui Dong, Ding Nan, Jun Liu, Sirui Li, Xiaotao Deng, Jiaqi Wang |
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| Rok vydání: | 2019 |
| Předmět: |
Battery (electricity)
Materials science Mechanical Engineering chemistry.chemical_element 02 engineering and technology Zinc 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences 0104 chemical sciences Anode law.invention chemistry Chemical engineering Mechanics of Materials law Mixed oxide General Materials Science Lithium Calcination 0210 nano-technology Cobalt |
| Zdroj: | Journal of Materials Research. 34:3204-3211 |
| ISSN: | 2044-5326 0884-2914 |
| DOI: | 10.1557/jmr.2019.258 |
| Popis: | Metal oxides are promising candidates as the anodes of next-generation lithium ion batteries. However, the low electronic conductivities hinder their practical applications. Herein, through a facile calcination process using ammonium bicarbonate (NH4HCO3) as the N source, the nitrogen heteroelement was introduced into the ZnO/CoO micro-/nanospheres, which greatly improves the conductivity of the composites. As the lithium-ion battery anode, the N-doped ZnO/CoO micro-/nanosphere demonstrates much enhanced electrochemical performance. It displays a high initial capacity of 911.8 mA h/g at a current density of 0.2 A/g and long-term cycling stability, with a reversible capacity of 977.8 mA h/g remained after 500 cycles at a current density of 1 A/g. Furthermore, the N-doped ZnO/CoO composite presents an outstanding rate performance, with 605 mA h/g remained even at 5 A/g. The excellent electrochemical properties make N-doped ZnO/CoO micro-/nanospheres a promising candidate as high-performance anodes for next-generation rechargeable LIBs. |
| Databáze: | OpenAIRE |
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