Utilizing Co²⁺/Co³⁺ Redox Couple in P2-Layered Na_0.66Co_0.22Mn_0.44Ti_0.34O₂ Cathode for Sodium-Ion Batteries.

ABSTRACT: Developing sodium-ion batteries for large-scale energy storage applications is facing big challenges of the lack of high-performance cathode materials. Here, a series of new cathode materials Na_0.66Co _x Mn_0.66-x Ti_0.34O₂ for sodium-ion batteries are designed and synthesized aiming to reduce transition metal-ion ordering, charge ordering, as well as Na⁺ and vacancy ordering. An interesting structure change of Na_0.66Co _x Mn_0.66-x Ti_0.34O₂ from orthorhombic to hexagonal is revealed when Co content increases from x = 0 to 0.33. In particular, Na_0.66Co_0.22Mn_0.44Ti_0.34O_2</

SUBMITTER: Wang QC 

PROVIDER: S-EPMC5700635 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature