Layered sodium titanate with a matched lattice: a single ion conductor in a solid-state sodium metal battery.

ABSTRACT: Na metal batteries using solid-state electrolytes (SSEs) have attracted intensive attention due to their superior safety and high energy density. However, the interfacial issue is one of the biggest challenges to their working normally for the achievement of high performance. To address the high SSE/Na interfacial resistance and facilitate Na⁺ migration, an efficient approach based on a lattice-matching effect is proposed. In this work, we synthesized a sheet-like layered sodium titanate with rich oxygen vacancies formulated as Na_0.98Ti_1.3O₃ (NTO). The NTO sheet behaves like a single ion conductor with a low ion migration activation energy of ∼0.159 eV and a high ion transference number (t_Na⁺) of 0.91, which is due to

SUBMITTER: Ma X 

PROVIDER: S-EPMC10699559 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature