Journal
IONICS
Volume 24, Issue 5, Pages 1329-1337Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-017-2291-7
Keywords
NiCo2O4 microspheres; Hydrothermal method; Anode material; Lithium-ion batteries
Funding
- Outstanding Youth Foundation of Hunan Provincial Education Department [15B190]
- Planned Science and Technology Project of Science and Technology Bureau of Xiangxi Tujia and Miao Autonomous Prefecture [2]
- Research Innovation Project for Graduate Student [CX2017B710, JDY16015]
- National Natural Science Foundation of China [51704124, 51762017, 51662010, 51472107, 51672104]
- Natural Science Foundation of Hunan Province, China [16JJ6121]
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In this paper, the urchin-like NiCo2O4 microspheres assembled by using sodium dodecyl sulfate (SDS) as soft template are successfully fabricated by a facile procedure including microemulsion-solvothermal reaction and subsequent calcination at 400 A degrees C for 4 h. The structure and morphology of synthesized NiCo2O4 particles are investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). It has been clearly revealed that the prepared three-dimensional urchin-like NiCo2O4 microspheres are constituted by one-dimension nanowires. As it is applied to anode for lithium-ion batteries (LIBs), the initial coulombic efficiency is up to 75.7%, and the specific reversible capacity retains up to 1034.2 mAh/g even after 40 cycles at a current density of 100 mA/g. Furthermore, as the current density gradually increases to 800 mA/g, it still delivers the reversible capacity of 895.4 mAh/g. The high reversible specific capacity, perfect cyclability, and rate performance are attributed to the unique urchin-like NiCo2O4 microspheres, which can alleviate the volume expansion and shorten the diffusion path of ions and electrons during lithiation/delithiation process. The self-standing urchin-like NiCo2O4 microspheres may be a very promising candidate in place of the commercial graphite-based anode materials for high-performance LIBs.
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