Understanding the electrochemical lithiation/delithiation process in the anode material for lithium ion batteries NiFeOPO4/C using ex-situ X-ray absorption near edge spectroscopy and in-situ synchrotron X-ray
- Mohammed VI Polytechnic Univ., Ben Guerir (Morocco); Cadi Ayyad Univ., Marrakesh (Morocco); Argonne National Lab. (ANL), Argonne, IL (United States)
- Cadi Ayyad Univ., Marrakesh (Morocco)
- Mohammed VI Polytechnic Univ., Ben Guerir (Morocco)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Mohammed VI Polytechnic Univ., Ben Guerir (Morocco); Univ. Hassan 1er, Khouribga (Morocco)
- Argonne National Lab. (ANL), Argonne, IL (United States); Stanford Univ., Stanford, CA (United States); Imam Abdulrahman Bin Faisal Univ. (IAU), Dammam (Saudi Arabia)
- Mohammed VI Polytechnic Univ., Ben Guerir (Morocco); Cadi Ayyad Univ., Marrakesh (Morocco)
Here, nickel iron (III) oxyphosphate NiFeOPO4 (NFP) was successfully synthesized using solid-state route and modified with carbon layer using sucrose as carbon source. The electrochemical performances of the composite anode material NiFeOPO4/C (NFP/C) vs. Li+/Li0 were investigated at C/5 current rate and in a wide voltage window 0.01-3.0 V. During the first lithiation at C/5, NFP/C was able to uptake more than six lithium ions into the structure delivering a capacity of 736.63 mAh g-1. In this study, NFP phosphate was characterized using XRD, SEM, EDS mapping, and Raman spectroscopy. The first cycle was investigated using high energy spectroscopies including: in-situ synchrotron X-Ray Diffraction and ex-situ X-ray Absorption Near Edge Spectroscopy (XANES). In-situ synchrotron XRD revealed that the crystal structure of NFP/C undergoes structural transformations leading to lower degrees of crystallinity during the first lithiation. Ex-situ XANES measurements disclosed that the redox reaction of iron and nickel during the first lithiation and delithiation is reversible.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V). Battery Materials Research (BMR) Program; USDOE
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1477459
- Alternate ID(s):
- OSTI ID: 1495273
- Journal Information:
- Electrochimica Acta, Vol. 283, Issue C; ISSN 0013-4686
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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