On the synthesis conditions for tailoring lithium composition in ramsdellite phases: Application for Li-ion batteries

► TiO2 ramsdellite (R) is metastable. ► TiO2 (R) has a theoretical capacity of 335 mAh g−1. ► TiO2 (R) was prepared by carbothermal synthesis, by using specific gas flows. ► TiO2 (R) shows interesting electrochemical performances.