Exploring redox activity in a LiCoPO4-LiCo2P3O10 tailored positive electrode for 5 v lithium ion batteries: Rigid band behavior of the electronic structure and stability of the delithiated phase

The stability of the novel highly electronically conductive LiCoPO4-LiCo2P3O10 tailored polyphosphate is studied under electrochemical delithiation using quasi in situ depth-resolved synchrotron photoelectron spectroscopy, X-ray absorption spectroscopy and X-ray diffraction. The cathode material exhibits a rigid band behavior of the electronic structure and is stable in its fully delithiated state without amorphization in air. © 2018 The Royal Society of Chemistry.