Abstract: LiMn(BH4)3 for On-Board Hydrogen Storage (2009 Annual Meeting)

Monday, November 9, 2009: 8:55 AM

Delta Ballroom D (Gaylord Opryland Hotel)

Pabitra Choudhury, Chemical and Biomedical Engineering, University of South Florida, Tampa, FL

Sesha S. Srinivasan, Clean Energy Research Center, College of Engineering, University of South Florida, Tampa, FL

Venkat R. Bhethanabotla, Chemical and Biomedical Engineering, University of South Florida, Tampa, FL

Yogi Goswami, Chemical and Biomedical Engineering, University of South Florida, Tampa, FL

Elias Stefanakos, Electrical Engineering, University of South Florida, Tampa, FL

In this study, a promising complex borohydride LiMn(BH₄)₃ was evaluated for on-board hydrogen storage. This new complex hydride was prepared from the precursor materials LiBH₄ and MnCl₂ via the solid state mechano-chemical process. The B-H stretch occurrence at 2374 cm^-1in addition to two other B-H bonding bands of LiBH₄ (2228 and 2297 cm^-1) from the FTIR investigation confirm the formation of LiMn(BH₄)₃ at room temperature. Gas chromatography studies of both undoped and doped LiMn(BH₄)₃ demonstrate that the evolved gas is mainly hydrogen and does not contain members of the borane family. Though this complex LiMn(BH₄)₃ exhibits high theoretical hydrogen storage capacity (~8 wt.%) at lower temperature (<150 ^oC), the reversible hydrogenation and dehydrogenation cycling is not promising. A strategy has been adopted to convert this new material to become reversible, and these results will also be presented.

Extended Abstract: File Not Uploaded

See more of this Session: Nanomaterials for Energy Storage I
See more of this Group/Topical: Topical 5: Nanomaterials for Energy Applications