Slight compositional variation-induced structural disorder-to-order transition enables fast Na⁺ storage in layered transition metal oxides.

ABSTRACT: The omnipresent Na⁺/vacancy orderings change substantially with the composition that inevitably actuate the ionic diffusion in rechargeable batteries. Therefore, it may hold the key to the electrode design with high rate capability. Herein, the influence of Na⁺/vacancy ordering on Na⁺ mobility is demonstrated firstly through a comparative investigation in P2-Na_2/3Ni_1/3Mn_2/3O₂ and P2-Na_2/3Ni_0.3Mn_0.7O₂. The large zigzag Na⁺/vacancy intralayer ordering is found to accelerate Na⁺ migration in P2-type Na_2/3Ni_1/3Mn_2/3O₂. By theoretical simulations, it is revealed that the Na⁺ ordering enables the P2-t

SUBMITTER: Shi Y 

PROVIDER: S-EPMC9780345 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature