title: Investigation on LiBH4-CaH2composite and its potential for thermal energy storage.
abstract: The LiBH4/CaH2composite are firstly studied as Concentrating Solar Power Thermal Storage Material. The LiBH4/CaH2composite according to the stoichiometric ratio are synthesized by high-energy ball milling method. The kinetics, thermodynamics and cycling stability of LiBH4/CaH2composite are investigated by XRD (X-ray diffraction), DSC (Differential scanning calorimeter) and TEM (Transmission electron microscope). The reaction enthalpy of LiBH4/CaH2composite is almost 60 kJ/mol H2and equilibrium pressure is 0.482 MPa at 450 °C. The thermal storage density of LiBH4/CaH2composite is 3504.6 kJ/kg. XRD results show that the main phase after dehydrogenation is LiH and CaB6. The existence of TiCl3and NbF5can effectively enhance the cycling perfomance of LiBH4/CaH2composite, with 6-7 wt% hydrogen capacity after 10 cycles. The high thermal storage density, high working temperature and low equilibrium pressure make LiBH4/CaH2composite a potential thermal storage material.
authors.affiliation: State Key Laboratory for Advanced Metals and Materials, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.affiliation: State Key Laboratory for Advanced Metals and Materials, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China.
authors.forename: Ping
authors.initials: P
authors.lastname: Li
authors.affiliation: State Key Laboratory for Advanced Metals and Materials, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China.
authors.forename: Xuanhui
authors.initials: X
authors.lastname: Qu