The objective of the proposed experiment is to develop an understanding of the Li/Ni/Mn ordering in a commercially relevant lithium ion battery positive electrode, LiNi0.5Mn1.5O4. The two LiNi0.5Mn1.5O4 phases, ordered and disordered, have been attributed to different electrochemical cycling behaviours in this material. Thus, identifying the presence of either phase over the entire life cycle of LiNi0.5Mn1.5O4, from synthesis to extended battery use and eventual battery failure, will provide vital insight to how the structure influences the battery behaviour. This information will be used to tailor the structure of the synthesised material to provide the desired electrochemical properties for potential commercial applications.