Coulombically-stabilized oxygen hole polarons enable fully reversible oxygen redox
Iwnetim I. Abate, C. Das Pemmaraju, Se Young Kim, Kuan H. Hsu, Sami Sainio, Brian Moritz, John Vinson, Michael F. Toney, Wanli Yang, William E. Gent, Thomas P. Devereaux, Linda F. Nazar, William C. Chueh
Abstract
. These coulombic interactions provide thermodynamic energy saving as large as O-O covalent bonding and enable ~ 40 mV voltage hysteresis over multiple electrochemical cycles with negligible voltage fade. Our results establish a complete picture of redox energetics by highlighting the role of coulombic interactions across several atomic distances and suggest avenues to stabilize highly oxidized oxygen for applications in energy storage and beyond.
Topics & Concepts
RedoxFaraday efficiencyCovalent bondOxygenChemical physicsPolaronElectrochemistryOxideMaterials scienceIntercalation (chemistry)ElectrodeChemistryInorganic chemistryOxygen evolutionHysteresisChemical bondNanotechnologyEnergy storageCrystallographyPhotochemistryElectrocatalysts for Energy ConversionAdvanced battery technologies researchAdvancements in Battery Materials