Toward understanding the lithiation/delithiation process in Fe0.5TiOPO4/C electrode material for lithium-ion batteries
- Cadi Ayyad Univ., Marrakech (Morrocco)
- Julich Research Centre (Germany)
- Cadi Ayyad Univ., Marrakech (Morrocco); Mohammad VI Polytechnical Univ., Ben Guerir (Morrocco)
- Univ. of Montpellier (France); Research Center on Batteries and Supercapacitors, Amiens Cedex (France)
- Julich Research Centre (Germany); Univ. of Liege, (Belgium). Faculty of Sciences; Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Karlsruhe Inst. of Technology (KIT) (Germany)
We used Fe0.5TiOPO4/C composite as anode material for LIB and exhibits excellent cycling performance when the electrode is cycled in two different voltage ranges [3.0-1.3V] and [3.0- 0.02V] where different insertion mechanisms were involved. Based on in situ X-ray diffraction, in situ XANES spectroscopy results, and various electrochemical analyses at high and low voltage cut-off, we found that Fe0.5TiOPO4/C electrode materials still maintains its structure crystallinity after cycling between [3.0-1.3V] showing formation of new phase at the end of first discharge, with a reversible capacity of 100 mAhg-1 after 50 cycles at C/5 rate. Moreover, at highly lithiated states, [3.0-0.02V] voltage range, a reduction decomposition reaction highlights the Li-insertion/extraction behaviors, and low phase crystallinity is observed during cycling, in addition an excellent rate behavior and a reversible capacity of 250 mAhg- 1 can still be maintained after 50 cycles at high cycling rate 5C.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1261325
- Alternate ID(s):
- OSTI ID: 1254046
- Journal Information:
- Solar Energy Materials and Solar Cells, Vol. 148, Issue C; ISSN 0927-0248
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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