Capturing Oxygen-Driven Electrolyte Oxidation during High-Voltage Cycling in Li-Rich Layered Oxide Cathodes
Zhiqiang Chen, Shaowei Kang, Jiming Peng, Yijia Cai, Youguo Huang, Qichang Pan, Fenghua Zheng, Hongqiang Wang, Qingyu Li, Sijiang Hu
Abstract
We use in operando Raman spectroscopy to investigate the structural evolution mechanism of transition metal cation and oxygen anion redox in Li-rich layered oxide cathodes. We directly capture the release of oxygen-driven electrolyte oxidation (especially the dimethyl carbonate component) at high-voltage operation (4.4 V).
Topics & Concepts
ElectrolyteOxideRaman spectroscopyOxygenCathodeInorganic chemistryChemistryTransition metalRedoxCarbonateCyclingChemical engineeringElectrodeMaterials scienceCatalysisPhysical chemistryBiochemistryHistoryArchaeologyOrganic chemistryOpticsPhysicsEngineeringAdvancements in Battery MaterialsAdvanced Battery Materials and TechnologiesAdvanced Battery Technologies Research