Reactive destabilization and bidirectional catalyzation for reversible hydrogen storage of LiBH_(4) by novel waxberry-like nano-additive assembled from ultrafine Fe_(3)O_(4) particles  

作　　者：S.Wang M.H.Wu Y.Y.Zhu Z.L.Li Y.X.Yang Y.Z.Li H.F.Liu M.X.Gao 

机构地区：[1]Department of Material Science,Shenzhen MSU-BIT University,Shenzhen 518172,China [2]State Key Laboratory of Silicon and Advanced Semiconductor Materials&School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China [3]Institute of Resources Utilization and Rare Earth Development,State Key Laboratory of Rare Metals Separation and Comprehensive Utilization,Guangdong Provincial Key Laboratory of Rare Earth Development and Application,Guangdong Academy of Sciences,Guangzhou 510650,China [4]Institute of Science and Technology for New Energy,Xi’an Technological University,Xi’an 710021,China [5]National Supercomputing Center in Shenzhen,Shenzhen 518055,China

出　　处：《Journal of Materials Science & Technology》2024年第6期63-71,共9页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.52071287);the Natural Science Foundation of Zhejiang Province(No.LZ23E010002);the Basic and Applied Basic Research Foundation of Guangdong Province(Nos.2021A1515110676,2022A1515011832).

摘　　要：LiBH_(4) containing 18.5 wt.%H_(2) is an attractive high-capacity hydrogen storage material,however,it suffers from high operation temperature and poor reversibility.Herein,a novel and low-cost bifunctional additive,waxberry-like Fe_(3)O_(4) secondary nanospheres assembled from ultrafine primary Fe_(3)O_(4) nanoparticles,is synthesized,which exhibits significant destabilization and bidirectional catalyzation towards(de)hydrogenation of LiBH_(4).With an optimized addition of 30 wt.% waxberry-like Fe_(3)O_(4),the system initiated dehydrogenation below 100℃ and released a total of 8.1 wt.%H_(2) to 400℃.After 10 cycles,a capacity retention of 70% was achieved,greatly superior to previously reported oxides-modified systems.The destabilizing and catalyzing mechanisms of waxberry-like Fe_(3)O_(4) on LiBH_(4) 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 developing advanced nano-additives with unique structural and multifunctional designs towards LiBH4 hydrogen storage.

关 键 词：LiBH_(4) Hydrogen storage Waxberry-like Fe_(3)O_(4) DESTABILIZATION Catalysis 

分 类 号：TB34[一般工业技术—材料科学与工程] O643.36[理学—物理化学]