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- Title
Fabrication and electrochemical performance of delafossite CuFeO<sub>2</sub> particles as a stable anode material for lithium-ion batteries.
- Authors
Zhang, Min; Zhu, Guangping; Dai, Jianming; Zhu, Xuebin; Liu, Qiangchun; Li, Qiang
- Abstract
The delafossite CuFeO2 anode materials have been successfully synthesized by hydrothermal process with different temperatures. The X-ray diffraction patterns reveal that two structural polytypes of CuFeO2 with 3R-CuFeO2 and 2H-CuFeO2 are obtained. The results of field-emission scanning electronic microscopy confirm that all CuFeO2 crystals display both hexagonal and rhyombohedral morphologies, which are in good agreement with XRD results. It can be clearly observed that particles sizes of CuFeO2 are increased and the size distributions of particles become broader as hydrothermal temperature increasing. Electrochemical results show that the CuFeO2 particles synthesized at 180 °C for 24 h display the best electrochemical performance and superior cycle performance. The CuFeO2 materials obtained at 180 °C for 24 exhibit a high reversible capacity and high-rate capability (a reversible capability of 390, 276, 185, 133, and 85 mA h g− 1 at 0.1, 0.2, 0.5, 1, 2C, respectively) with good cycling performance (approximate 6.8% capacity loss after 500 cycles at 1C with a capacity retention of 124 mA h g− 1). The excellent electrochemical performance can be attributed to the small particle size and narrow size distributions. It is believed that obtained CuFeO2 crystals as anode materials with high reversible capacity, good rate capability and cyclic stability may be potential candidates for applying in lithium-ion batteries.
- Subjects
LITHIUM-ion batteries; ANODES; ELECTROCHEMICAL electrodes; SEMICONDUCTOR materials -- Electric properties; COPPER compounds synthesis; HYDROTHERMAL synthesis; X-ray diffraction; SCANNING electron microscopy
- Publication
Journal of Materials Science: Materials in Electronics, 2018, Vol 29, Issue 22, p19454
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-018-0075-0