Alkali metals are well-known to form regularly-layered graphite intercalation compounds (GICs) which exhibit a number of novel and practically important structural and electronic properties. In this proposal we will use neutron spectroscopy to study (i) the diffusion dynamics of 7Li in the binary GICs LiC6-12, and (ii) the rotational and diffusional dynamics of ammonia NH3 in the GICs Li & CaC12(NH3)n. In the first system we are motivated by the need to understand the atomic-scale mobility of lithium in battery electrodes, and also by our general interest in staging transitions. In the second case the motivation is to study the dynamics of 2-D confined fluids in nanometer scale galleries. Ca-GICs are unique Ca-GICs are unique in that they expand first to 6.6 and then to 9.9Å in the presence of ammonia, corresponding to one- and two- molecular layers respectively.