Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 767, Issue -, Pages 223-231Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.07.091
Keywords
NiCo2O4/NiFe2O4; Hollow nanospheres; Li-ion batteries; Supercapacitors
Categories
Funding
- National Natural Science Foundation of China [51574062]
- National Key Research and Development Program of China [2016YFB0901600]
- Zhejiang Provincial Natural Science Foundation of China [LY18B010001]
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Designing mixed metal oxides with uniform nanostructures as a significant electrode material in energy storage devices is a vital concern for the whole world. But achieving this goal is plagued by many problems such as tedious procedures, hard morphology control and poor conductivities. The NiCo2O4/NiFe2O4 hollow nanospheres (NSs) are prepared for the first time through a novel one-pot approach. The introduced NiFe2O4 has amazingly improved the electrochemical performance of NiCo2O4 hollow NSs in both Li-ion batteries (LIBs) and supercapacitors (SCs). And the ratio of Fe to Ni plays an important role for the improvement of electrochemical performance. The NiCo2O4/NiFe2O4 hollow NSs exhibit superior capacity/capacitance values (3795 F g(-1) at a current density of 1 A g(-1)) and fine cycling performances (11.0% specific capacitance decay after 6000 cycles) which can be attributed to the larger specific surface area of hollow NSs and the synergistic effect of two components. This provides a feasible preview of their practical applications. (C) 2018 Elsevier B.V. All rights reserved.
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