Abstract
LiBH4 containing 18.5 wt.％H2 is an attractive high-capacity hydrogen storage material,however,it suf-fers from high operation temperature and poor reversibility.Herein,a novel and low-cost bifunctional additive,waxberry-like Fe3O4 secondary nanospheres assembled from ultrafine primary Fe3O4 nanopar-ticles,is synthesized,which exhibits significant destabilization and bidirectional catalyzation towards(de)hydrogenation of LiBH4.With an optimized addition of 30 wt.％waxberry-like Fe3O4,the system initiated dehydrogenation below 100 ℃ and released a total of 8.1 wt.％H2 to 400 ℃.After 10 cycles,a capacity retention of 70％was achieved,greatly superior to previously reported oxides-modified sys-tems.The destabilizing and catalyzing mechanisms of waxberry-like Fe3O4 on LiBH4 were systematically analyzed by phase and microstructural evolutions during dehydrogenation and hydrogenation cycling as well as density functional theory(DFT)calculations.The present work provides new insights in develop-ing advanced nano-additives with unique structural and multifunctional designs towards LiBH4 hydrogen storage.
基金项目
National Natural Science Foundation of China(52071287)
Natural Science Foundation of Zhejiang Province(LZ23E010002)
Basic and Applied Basic Research Foundation of Guangdong Province(2021A1515110676)
Basic and Applied Basic Research Foundation of Guangdong Province(2022A1515011832)
NETL
NSTL
万方数据