Li{sub 4}FeH{sub 6}: Iron-containing complex hydride with high gravimetric hydrogen density
- Quantum Beam Science Center, Japan Atomic Energy Agency, Hyogo 679-5148 (Japan)
- Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
- WPI-Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
- Renewable Energy Research Center, National Institute of Advanced Industrial Science and Technology, Fukushima 963-0215 (Japan)
Li{sub 4}FeH{sub 6}, which has the highest gravimetric hydrogen density of iron-containing complex hydrides reported so far, is synthesized by hydrogenation of a powder mixture of iron and LiH above 6.1 GPa at 900 °C. In situ synchrotron radiation X-ray diffraction measurements reveal that while kinetics require high temperature and thus high pressure for the synthesis, Li{sub 4}FeH{sub 6} is expected to be thermodynamically stable slightly below room temperature at ambient pressure; further synthetic studies to suppress the kinetic effects may enable us to synthesize Li{sub 4}FeH{sub 6} at moderate pressures. Li{sub 4}FeH{sub 6} can be recovered at ambient conditions where Li{sub 4}FeH{sub 6} is metastable.
- OSTI ID:
- 22304484
- Journal Information:
- APL Materials, Vol. 2, Issue 7; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 2166-532X
- Country of Publication:
- United States
- Language:
- English
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