Architecture–property relationships of zero-, one- and two-dimensional carbon matrix incorporated Na2Fe(SO4)2·2H2O/C

摘要: The correlations between properties and architecture are a central theme for electroactive materials in energy storage devices. We have conducted systematic investigation on the relationship physicochemical characteristics of sulfate/C composites. Three types carbon matrix, i.e. activated (AC:0D), single wall nanotubes (CNT:1D) graphene (GA:2D) were employed to construct different structured discussion is focused such as electronic conductivity, moisture absorption, sodium intercalation kinetics electrochemical performance composite. Na2Fe(SO4)2·2H2O/AC composite has largest electrode/electrolyte interface highest porosity, thus it allows fastest ionic diffusion best high-rate capability. However, sandwich-type Na2Fe(SO4)2·2H2O/GA most compact toughest architecture, conductivity lowest sensitivity. rational design principle Na2Fe(SO4)2·2H2O/C with desirable thermodynamic kinetic was deduced from comprehensive evaluation architecture–property relationships. also propose electron/ion pathway absorption mechanism found architectures. present study potential application guide composites conversion.