Li+ Diffusion Dynamics in Pure and Doped Na2Li2Ti6O14

Na2Li2Ti6O14 (NaLTO) has potential to be developed as an alternative anode material with improved safety, cycling stability, and rate performance. The practical application of the NaLTO anode still need to be studied to understand the diffusion dynamics in NaLTO at different temperatures. Hence, our study with muon technique is aiming to explain Li+ diffusion dynamics in pure, Zr-doped, and (Zr-Al)-co-doped orthorhombic NaLTO, focused in the temperature range of 120 K – 400 K and investigate how the dopants improve the Li+ conductivity of NaLTO. We expect that the Ti-site substitution by Zr4+ ions in Zr-doped NaLTO enhance the Li+ diffusion due to enlargement of its lattice parameter without changing the orthorhombic structure. In case of Al3+ doping in (Zr-Al)-co-doped NaLTO, the Na-site substitution by Al3+ ions can improve the electronic conductivity by electron doping mechanism.