The role of solid solutions in iron phosphate-based electrodes for selective electrochemical lithium extraction.

ABSTRACT: Electrochemical intercalation can enable lithium extraction from dilute water sources. However, during extraction, co-intercalation of lithium and sodium ions occurs, and the response of host materials to this process is not fully understood. This aspect limits the rational materials designs for improving lithium extraction. Here, to address this knowledge gap, we report one-dimensional (1D) olivine iron phosphate (FePO₄) as a model host to investigate the co-intercalation behavior and demonstrate the control of lithium selectivity through intercalation kinetic manipulations. Via computational and experimental investigations, we show that lithium and sodium tend to phase separate in the host. Exploiting this mechanism, we increase the sodium-ion intercalation energy barrier by u

SUBMITTER: Yan G 

PROVIDER: S-EPMC9355959 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature