Investigation on LiBH4-CaH2 composite and its potential for thermal energy storage

被引：24

作者：

Li, Yang ^{[1
]}

Li, Ping ^{[1
]}

Qu, Xuanhui ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

SCIENTIFIC REPORTS | 2017年 / 7卷

基金：

中国国家自然科学基金;

关键词：

REVERSIBLE HYDROGEN STORAGE; METAL HYDRIDE; CA(BH4)(2); CAH2/LIBH4; KINETICS; MG; TI;

D O I：

10.1038/srep41754

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The LiBH4/CaH2 composite are firstly studied as Concentrating Solar Power Thermal Storage Material. The LiBH4/CaH2 composite according to the stoichiometric ratio are synthesized by high-energy ball milling method. The kinetics, thermodynamics and cycling stability of LiBH4/CaH2 composite are investigated by XRD (X-ray diffraction), DSC (Differential scanning calorimeter) and TEM (Transmission electron microscope). The reaction enthalpy of LiBH4/CaH2 composite is almost 60 kJ/mol H-2 and equilibrium pressure is 0.482 MPa at 450 degrees C. The thermal storage density of LiBH4/CaH2 composite is 3504.6 kJ/kg. XRD results show that the main phase after dehydrogenation is LiH and CaB6. The existence of TiCl3 and NbF5 can effectively enhance the cycling perfomance of LiBH4/CaH2 composite, with 6-7 wt% hydrogen capacity after 10 cycles. The high thermal storage density, high working temperature and low equilibrium pressure make LiBH4/CaH2 composite a potential thermal storage material.

引用

页数：8

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