Rb/Cs-Modified P2 Na_0.7Mn_0.8Mg_0.2O₂: Application in Sodium-Ion Batteries.

ABSTRACT: To meet the growing energy demands, sodium-ion batteries can be a potential substitute for lithium-ion batteries. Here, we report the solid-state synthesized alkali Rb- and Cs-modified Na_0.7Mn_0.8Mg_0.2O₂, which adopts hexagonal P6₃/mmc symmetry. The second charge/discharge capacity for the as-synthesized Rb- and Cs-modified P2 Na_0.7Mn_0.8Mg_0.2O₂ are 118/114 and 130/125 mA h g^-1, which reduces to 62/62 and 77/76 mA h g^-1, respectively, after 100 cycles. In situ synchrotron X-ray diffraction data illustrate that a solid solution reaction occurs for most of the charge/discharge process in both cases. Rb-modified P2 Na_0.7Mn_0.8Mg_0.2

SUBMITTER: Sehrawat D 

PROVIDER: S-EPMC6648630 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature