CoFe2O4 nanoparticles directly grown on carbon nanotube with coralline structure as anodes for lithium ion battery
- 22 Downloads
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.
This work was financially supported by the national natural science foundation of China (Grant No. 51872236), the Natural Science Foundation of Shaanxi Province (Grant No. 2015JZ014) and the Innovation Foundation of Shanghai Aero-space Science and Technology (Grant No. SAST2016114). Moreover, we would like to thank the Analytical & Testing Center of Northwestern Polytechnical University for supplying the testing equipment.
Compliance with ethical standards
Conflict of interest
The authors declare there is no conflict of interest.
- 9.Y. Wang, J. Park, B. Sun, H. Ahn, G. Wang, Wintersweet-flower-like CoFe2O4/MWCNTs hybrid material for high-capacity reversible lithium storage. Chemistry 43, 1940–1946 (2012)Google Scholar