1. Mixing amorphous carbon enhanced electrochemical performances of NiCo2O4 nanoparticles as anode materials for sodium-ion batteries.
- Author
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Nguyen, Hung H., To, Nguyen V., Tran, Thu V., Nguyen, Ky V., Luong, Son T., Nguyen, Nga N. T., Hoang, Chung V., Nguyen, Hieu S., and Nguyen, Nghia V.
- Subjects
TRANSITION metal oxides ,AMORPHOUS carbon ,COMPOSITE materials ,ELECTRIC batteries ,ANODES ,ELECTROCHEMICAL electrodes ,NANOPARTICLES ,ACTIVATED carbon - Abstract
The NiCo
2 O4 ternary transition metal oxide (NCO) has been received a great interest as anode material for sodium-ion batteries, recently. Here we show that a composite material composed of NCO nanoparticles (NCO-NPs) and amorphous carbon (NCO/C composite) displayed a superior electrochemical performance over the NCO-NPs. The NCO-NPs delivered a capacity of 172 mAh g−1 at the current density of 50 mA g−1 , and the capacity was reduced to 29 mAh g−1 after 50 cycles. The NCO/C composite showed a capacity of 213 mAh g−1 at 50 mA g−1 ; the capacity was lowered to 119 mAh g−1 after 100 cycles. The capacity of the composite at 100 mA g−1 , 200 mA g−1 and 300 mA g−1 was ca. 123 mAh g−1 , 93 mAh g−1 and 62 mAh g−1 , respectively. This improvement is ascribed to the presence of the activated hard carbon of high electronic conductivity. Our work suggests that the combination of amorphous carbon with the NCO-NPs can serve as anodes for sodium-ion batteries. [ABSTRACT FROM AUTHOR]- Published
- 2020
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