Li4FeH6: Iron-containing complex hydride with high gravimetric hydrogen density

DOI PDF 16 Citations 30 References Open Access
  • Hiroyuki Saitoh
    Japan Atomic Energy Agency 1 Quantum Beam Science Center, , Hyogo 679-5148, Japan
  • Shigeyuki Takagi
    Tohoku University 2 Institute for Materials Research, , Sendai 980-8577, Japan
  • Motoaki Matsuo
    Tohoku University 2 Institute for Materials Research, , Sendai 980-8577, Japan
  • Yuki Iijima
    Tohoku University 3 WPI-Advanced Institute for Materials Research, , Sendai 980-8577, Japan
  • Naruki Endo
    National Institute of Advanced Industrial Science and Technology 4 Renewable Energy Research Center, , Fukushima 963-0215, Japan
  • Katsutoshi Aoki
    Tohoku University 2 Institute for Materials Research, , Sendai 980-8577, Japan
  • Shin-ichi Orimo
    Tohoku University 2 Institute for Materials Research, , Sendai 980-8577, Japan

Description

<jats:p>Li4FeH6, 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, Li4FeH6 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 Li4FeH6 at moderate pressures. Li4FeH6 can be recovered at ambient conditions where Li4FeH6 is metastable.</jats:p>

Journal

  • APL Materials

    APL Materials 2 (7), 076103-, 2014-07-01

    AIP Publishing

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