Low Temperature Milling of the LiNH2 + LiH Hydrogen Storage System

Journal Article · Fri May 01 00:00:00 EDT 2009 · International Journal of Hydrogen Energy, 34(10):4331-4339

DOI:https://doi.org/10.1016/j.ijhydene.2009.03.032· OSTI ID:974970

Osborn, William; Markmaitree, Tippawan; Shaw, Leonard D; Hu, Jian Z; Kwak, Ja Hun; Yang, Zhenguo

Ball milling of the LiNH2 + LiH storage system was performed at 20°C, -40°C, and -196°C, and the resulting powders were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), nuclear magnetic resonance (NMR), specific surface area (SSA) analysis, and kinetics cycling measurements. Ball milling at -40°C showed no appreciable deviations from the 20°C sample, but the -196°C powder exhibited a significant increase in the hydrogen desorption kinetics. NMR analysis indicates that a possible explanation for the kinetics increase is the retention of internal defects generated during the milling process that are annealed at the collision site at higher milling temperatures.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 974970
• Report Number(s): PNNL-SA-65424; IJHEDX; 13499d; EB4202000; TRN: US201007%%919
• Journal Information: International Journal of Hydrogen Energy, 34(10):4331-4339, Vol. 34, Issue 10; ISSN 0360-3199
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
DEFECTS
DESORPTION
HYDROGEN
HYDROGEN STORAGE
KINETICS
MILLING
NUCLEAR MAGNETIC RESONANCE
RETENTION
SCANNING ELECTRON MICROSCOPY
SPECIFIC SURFACE AREA
STORAGE
X-RAY DIFFRACTION
Environmental Molecular Sciences Laboratory