Spin-Polarized Surface Capacitance Effects Enable Fe₃ O₄ Anode Superior Wide Operation-Temperature Sodium Storage.

ABSTRACT: Fe₃ O₄ is widely investigated as an anode for ambient sodium-ion batteries (SIBs), but its electrochemical properties in the wide operation-temperature range have rarely been studied. Herein, the Fe₃ O₄ nanoparticles, which are well encapsulated by carbon nanolayers, are uniformly dispersed on the graphene basal plane (named Fe₃ O₄ /C@G) to be used as the anode for SIBs. The existence of graphene can reduce the size of Fe₃ O₄ /C nanoparticles from 150 to 80 nm and greatly boost charge transport capability of electrode, resulting in an obvious size decrease of superparamagnetic Fe nanoparticles generated from the conversion reaction from 5 to 2 nm. Importantly, the ultra-small superparamagnetic Fe nanopa

SUBMITTER: Li Z 

PROVIDER: S-EPMC10853739 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature