Inducing Crystalline Se as an Active Redox Mediator via Ball-Milling in VSe2@c-Se Hybrids for High-Performance Lithium-Oxygen Batteries

It mainly pertains to research on the VSe₂ cathode catalyst for lithium–oxygen batteries and includes a series of material characterization data. The dataset primarily consists of raw Raman data, morphological characterization data, Powder Diffraction Files, and electrochemical-related data.raman date：Raman data for VSe₂ with different ball-milling times were collected and named according to the milling duration from 0 to 7 hoursPowder Diffraction File (PDF)：include VSe2; Li2O2; SeElectrophoretic gels and blots：include：CV, EIS, Loop curve, Initial loop capacity Microscopy：ball-milling of VSe2 and not ball-milling of VSe2