Vacancy-ordered perovskite superlattice in cerium titanate negative electrode for enhanced lithium-ion storage.

ABSTRACT: Commercial negative electrodes such as graphite and Li₄Ti₅O₁₂ are fundamental to lithium-ion batteries but face inherent trade-offs among safety, energy density, rate performance, and cycling stability. In this work, we introduce structural ordering and vacancy engineering into a perovskite negative electrode Ce_2/3TiO₃ to tackle this dilemma, by creating highly ordered Ce vacancies that form a stable superlattice. As a result, micron-sized Ce_2/3TiO₃ achieves a high specific capacity (>200 mAh g^-1) at an optimal operating potential (~0.8 V vs. Li⁺/Li), with fast-charging capability up to 50 C and stable cycling performance exceeding 10000 cycles at 20 C. Its electrochemical performance has the

SUBMITTER: Xiong X 

PROVIDER: S-EPMC12738579 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature