Neutron Diffraction Study of a Sintered Iron Electrode In Operando.

ABSTRACT: Iron is a promising, earth-abundant material for future energy applications. In this study, we use a neutron diffractometer to investigate the properties of an iron electrode in an alkaline environment. As neutrons penetrate deeply into materials, neutron scattering gives us a unique insight into what is happening inside the electrode. We made our measurements while the electrode was charging or discharging. Our key questions are: Which phases occur for the first and second discharge plateaus? And why are iron electrodes less responsive at higher discharge rates? We conclude that metallic iron and iron hydroxide form the redox pair for the first discharge plateau. For the second discharge plateau, we found a phase similar to feroxyhyte but with symmetrical and equally spaced arrangement of

SUBMITTER: Weninger BMH 

PROVIDER: S-EPMC8350908 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature