Details

Autor(en) / Beteiligte

• Fang, Z.Z.
• Wang, P.
• Rufford, T.E.
• Kang, X.D.
• Lu, G.Q.
• Cheng, H.M.

Titel

Kinetic- and thermodynamic-based improvements of lithium borohydride incorporated into activated carbon

Ist Teil von

• Acta materialia, 2008-12, Vol.56 (20), p.6257-6263

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2008

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• LiBH 4 was incorporated into an activated carbon (AC) scaffold using a chemical impregnation method. Confinement of LiBH 4 within the carbon nanopores was found to significantly improve both the hydrogen sorption kinetics and thermodynamics, compared to the bulk hydride. The LiBH 4/AC sample starts to release hydrogen from just 220 °C, which is 150 °C lower than the onset dehydrogenation temperature of bulk LiBH 4. The dehydrogenation rate of the LiBH 4/AC sample was one order of magnitude faster than that of bulk LiBH 4. The temperature and hydrogen pressure conditions required for restoring the hydride were also significantly reduced when LiBH 4 was incorporated into AC. Preliminary study showed that the dissociation hydrogen pressure of LiBH 4 could be enhanced by around one order of magnitude upon incorporating the hydride into AC. X-ray diffraction, Fourier transform infrared spectroscopy and nitrogen adsorption analyses were used to confirm the nanostructure of LiBH 4 in the AC scaffold.