Thermochemistry of cation disordered Li ion battery cathode materials, (M' = Nb and Ta, M'' = Mn and Fe).

ABSTRACT: High temperature oxide melt solution calorimetry studies on (M' = Nb⁵⁺, M'' = Mn³⁺ and Fe³⁺ and x = 0.20, 0.30 and 0.40) oxides and a new family of Ta containing Li excess disordered cathode materials, (M' = Ta⁵⁺, M'' = Fe³⁺ and x = 0.20, 0.30 and 0.40), synthesized by a rapid quenching method, are reported in this study. The enthalpies of formation determined from high temperature calorimetry studies reveal that the stability of compounds increases with the increasing Li content per formula unit. The reaction between more basic Li₂O and acidic transition metal oxides results in the more negative enthalpies of formation for these compounds. The work reveals that the formation enthalpy term plays a more importan

SUBMITTER: Subramani T 

PROVIDER: S-EPMC9049730 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature