LiFePO4 is cathode material for Li ion batteries. One of the key functional properties is the Li-ion diffusion. Theoretical calculations showed that Li diffusion along the [010] channels is the favored path, and this was later visualized using neutron diffraction. Mu+SR is the only technique which succeeded to measure the ionic diffusion on the atomic scale (and not through a macroscopic sample) in the relevant temperature range. This was done on powder samples. After a successful test experiment, we would like to measure now the anisotropy using single crystals. To fully decompose the components 3 orthogonal directions has to be measured. The limited sample amount results in longer counting times, therefore we apply for 8 days at EMU to measure direction dependent Li diffusion in LiFePO4 single crystals in the temperature range of 150-300 K.