A vanadium-based oxide-phosphate-pyrophosphate framework as a 4 V electrode material for K-ion batteries
Mirai Ohara, A. Shahul Hameed, Kei Kubota, Akihiro Katogi, Kuniko Chihara, Tomooki Hosaka, Shinichi Komaba
Abstract
a two-phase reaction mechanism. Despite the extraction/insertion of large potassium ions, the material demonstrates an insignificant volume change of ∼1.2% during charge/discharge resulting in excellent cycling stability without capacity degradation over 100 cycles in a highly concentrated electrolyte cell. Robustness of the polyanionic framework is proved from identical XRD patterns of the pristine and cycled electrodes (after 100 cycles).
Topics & Concepts
VanadiumPyrophosphateVanadium oxideElectrodePhosphatePotassiumIonInorganic chemistryOxidePotassium phosphateChemistryMaterials scienceMetallurgyPhysical chemistryChromatographyOrganic chemistryEnzymeAdvancements in Battery MaterialsTransition Metal Oxide NanomaterialsAdvanced Battery Materials and Technologies