Doping-induced memory effect in Li-ion batteries: the case of Al-doped Li₄Ti₅O₁₂.

ABSTRACT: In Li-ion batteries (LIBs), a memory effect has been revealed in two-phase electrode materials such as olivine LiFePO₄ and anatase TiO₂, which complicates the two-phase transition and influences the estimation of the state of charge. Practical electrode materials are usually optimized by the element doping strategy, however, its impact on the memory effect has not been reported yet. Here we firstly present the doping-induced memory effect in LIBs. Pristine Li₄Ti₅O₁₂ is free from the memory effect, while a distinct memory effect could be induced by Al-doping. After being discharged to a lower cutoff potential, Al-doped Li₄Ti₅O₁₂ exhibits poorer electrochemical kinetics, delivering a larger overpotential

SUBMITTER: Li 

PROVIDER: S-EPMC5497270 | biostudies-literature | 2015 Jul

REPOSITORIES: biostudies-literature