Evolution of the Fermi Level

4 Reliability of the Rigid-Band Model in Lithium Intercalation Compounds 

As the potential of an insertion compound-based lithium battery is determined by the difference between the chemical potentials of electrodes (Eq. 1.6), the crystal chemistry of the cathode governs the cell voltage. As an example. Fig. 4.3 illustrates the role of the polyanions, i.e., (P04) and, in iron-containing 

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