State Key Laboratory for Advanced Metals and Materials, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China.
Sci Rep. 2017 Jan 31;7:41754. doi: 10.1038/srep41754.
The LiBH/CaH composite are firstly studied as Concentrating Solar Power Thermal Storage Material. The LiBH/CaH composite according to the stoichiometric ratio are synthesized by high-energy ball milling method. The kinetics, thermodynamics and cycling stability of LiBH/CaH composite are investigated by XRD (X-ray diffraction), DSC (Differential scanning calorimeter) and TEM (Transmission electron microscope). The reaction enthalpy of LiBH/CaH composite is almost 60 kJ/mol H and equilibrium pressure is 0.482 MPa at 450 °C. The thermal storage density of LiBH/CaH composite is 3504.6 kJ/kg. XRD results show that the main phase after dehydrogenation is LiH and CaB. The existence of TiCl and NbF can effectively enhance the cycling perfomance of LiBH/CaH composite, with 6-7 wt% hydrogen capacity after 10 cycles. The high thermal storage density, high working temperature and low equilibrium pressure make LiBH/CaH composite a potential thermal storage material.
LiBH/CaH 复合材料首次被研究作为聚光太阳能热储能材料。LiBH/CaH 复合材料按照化学计量比通过高能球磨法合成。通过 XRD（X 射线衍射）、DSC（差示扫描量热法）和 TEM（透射电子显微镜）研究了 LiBH/CaH 复合材料的动力学、热力学和循环稳定性。LiBH/CaH 复合材料的反应焓约为 60kJ/mol H，在 450°C 时平衡压力为 0.482MPa。LiBH/CaH 复合材料的储热密度为 3504.6kJ/kg。XRD 结果表明，脱氢后的主要相是 LiH 和 CaB。TiCl 和 NbF 的存在可以有效提高 LiBH/CaH 复合材料的循环性能，经过 10 次循环后具有 6-7wt%的储氢容量。高储热密度、高工作温度和低平衡压力使 LiBH/CaH 复合材料成为一种有潜力的热储能材料。
