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In Vivo EPR Assessment of pH, pO2, Redox Status, and Concentrations of Phosphate and Glutathione in the Tumor Microenvironment
Published on: March 16, 2018
Redox processes in sodium vanadium phosphate cathodes - insights from operando magnetometry
Gregor Klinser1, Roman Zettl, Martin Wilkening
1Institute of Material Physics, Graz University of Technology, Petersgasse 16, A-8010 Graz, Austria. wuerschum@tugraz.at g.klinser@tugraz.at.
Abstract:
Operando magnetic susceptibility measurements of sodium ion cathode materials during repetitive electrochemical cycling enable a continuous and bulk sensitive monitoring of the transition metal oxidation states. Such measurements on NaxV2(PO4)3 identified vanadium to be the only ion undergoing oxidation/reduction processes upon battery operation. For the initial battery charging-discharging cycle as well as for the first cycle after prolonged room temperature storage, however, peculiarities within the magnetic susceptibility measurements indicate parasitic side reactions, likely on the cathode surface.
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