Does Pseudocapactive Charge Storage Take Place in Nanoparticulate TiO2 and Li4Ti5O12 Anodes?
We studied nanoparticlate LTO electrodes and compared this to Li storage in Nb-doped TiO2 particles. Using scan rate-dependent cyclic voltammetry, we determined the amount of Faradaic and of pseudocapactive charge with the same method that was reported in the literature , . Thereby, we discovered that the application of this method leads to unphysical results, which is originated in the iso-potential plots of the scan-rate dependent current density. We show that even for simple prototype Faradaic reactions, such iso-potential plots yield an apparent pseudocapacitance.
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