CoFe2O4 nanoparticles directly grown on carbon nanotube with coralline structure as anodes for lithium ion battery
| Autor: | Zhenhe Feng, Liu Liu, Meng Yu, Ying Huang, Ke Wang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Composite number chemistry.chemical_element Nanoparticle Carbon nanotube Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Lithium-ion battery Electronic Optical and Magnetic Materials law.invention Anode chemistry Chemical engineering law 0103 physical sciences Lithium Graphite Electrical and Electronic Engineering Faraday efficiency |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 30:4174-4183 |
| ISSN: | 1573-482X 0957-4522 |
| Popis: | In this work, tiny CoFe2O4 nanoparticles with a diameter of several nanometers were firmly grown on carbon nanotube (CNT) through a solvothermal process followed with calcination step. The composite shows a coralline structure, where CoFe2O4 nanoparticles are dispersed finely on the surface of CNT. The coralline CoFe2O4–CNT composite electrode can deliver initial discharge/charge capacities of 1183.6/876.1 mAh g−1 at 100 mA g−1, with a Coulombic efficiency reaching up to 74.0%. The capacity drops first but ascends latter when the electrode is cycled 220 times at 200 mA g−1, giving a value of 747.5 mAh g−1 at 220th discharge process. Besides, the composite displays a capacity of 620.8 mAh g−1 even at a high rate of 1600 mA g−1, larger than commercialized graphite (372 mAh g−1). Thus, coralline CoFe2O4–CNT composite of remarkable electrochemical properties makes it a promising anode for lithium ion batteries. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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