Surface-Engineered LiTiO Nanostructures for High-Power Li-Ion Batteries.

Materials with high-power charge-discharge capabilities are of interest to overcome the power limitations of conventional Li-ion batteries. In this study, a unique solvothermal synthesis of LiTiO nanoparticles is proposed by using an off-stoichiometric precursor ratio. A Li-deficient off-stoichiometry leads to the coexistence of phase-separated crystalline nanoparticles of LiTiO and TiO exhibiting reasonable high-rate performances.

Interface-engineered LiTiO-TiO dual-phase nanoparticles and CNT additive for supercapacitor-like high-power Li-ion battery applications.

The single-pot synthesis of dual-phase spinel-LiTiO and anatase-TiO (LTO-TiO) nanoparticles over all the phase fractions ranging from pure LTO to pure TiO is conducted. Carrying out the process over the complete range enabled the identification of a unique weight ratio of 85:15 (LTO:TiO), providing the best combination of capacity, rate capability and cycling stability. We show that for this composition dual-phase nanoparticles have a predominant interfacial orientation of (111)∣∣(004) , while it is (111)∣∣(101) for other compositions.