Journal
POWDER TECHNOLOGY
Volume 354, Issue -, Pages 834-841Publisher
ELSEVIER
DOI: 10.1016/j.powtec.2019.07.004
Keywords
Transition metal phosphides; Nanocage; Anode; Electrochemical performance; Lithium ion battery
Categories
Funding
- Nature Science Foundation of China [11702234]
- Nature Science Foundation of Hunan province [2018113488]
- Opening Project of Engineering Research Center of Nano-Geo Materials of Ministry of Education of China University of Geosciences [NGM2020KF009]
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Double metal phosphide (NiCoP) nanocage was synthesized with zeolitic imidazolate framework-67 (ZIF-67) as the template, further acidic etching and precipitation, finally phosphorization treatment with NaH2PO2. The nanocages well inherit the quasi-polyhedron shape of the ZIF-67 templates, and both the outer and inner shell of the nanocage is composed of many interconnected nanosheets with large quantities micro-holes on the surface. The nanosheets cross-link to form unique multi-channel frameworks for both ions and electrons fast-diffusion. Electrochemical measurements demonstrate that the NiCoP electrode, when used as an anode for lithium ion battery, offers a high reversible capacity (622 mAh/g at 100 mA/g), as well as a high rate capacity (373 mAh/g at 1000 mA/g), and good cyclability with a capacity retention of 104 mAh/g after 100 cycles at 1000 mA/g. (C) 2019 Elsevier B.V. All rights reserved.
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