Early studies on the diffusion of charge carrier species within olivine materials assumed a strictly 1D diffusion material, consisting of channels that permeate the whole crystal system in the [010] direction. 100 However, new measurements indicated a de facto 2D migration of lithium ions in the olivine structure, 101 which contradicted theoretical studies during that time that claimed the cross-channel migration to be significantly unfavored. Olivine materials are especially interesting as energy storage materials due to their high operating potentials and high capacity, but the scientific interest in the optimization of olivine structured compounds increased even further with the recent successful commercialization of LiFePO 4 . 110 Most of today's research focuses on either ridding this popular system from its known drawbacks, i.e. their low energy density and slow rate performance or on the development of its derivative systems utilizing manganese, cobalt or nickel. 111,112