The formation mechanism of Li₄Ti₅O_12-y solid solutions prepared by carbothermal reduction and the effect of Ti³⁺ on electrochemical performance.

ABSTRACT: Samples of Li₄Ti₅O_12-y solid solutions are synthesized by one-step solid-state carbothermal reduction reaction using Li₂CO₃, anatase, and carbon black under a nitrogen atmosphere. The underlying formation mechanism that leads to Li₄Ti₅O_12-y solid solutions is proposed. The formation mechanism of the Li₄Ti₅O_12-y solid solution is investigated by in situ variable temperature X-Ray diffraction (VT-XRD) and thermogravimetric analysis/differential scanning calorimetry (TGA-DSC). First, some Ti⁴⁺ centers are converted to Ti³⁺ (TiO₂-TiO_2-x) because of the presence of carbon black. Secondly, Li₂CO₃ reacts with TiO

SUBMITTER: Yang G 

PROVIDER: S-EPMC6423044 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature