A systematic evaluation of the electrochemical oxidation of porous graphite powder electrodes in , , and propylene carbonate (PC) electrolytes containing or is described. The graphite compounds obtained are characterized by x‐ray powder diffraction while in the electrolyte solution and following evacuation. The potential‐charge curves reveal a number of common features which are used to estimate the efficiency of the galvanostatic charge process in the different electrolytes. The stabilities of the intercalation compounds are also examined by a recharge method. The electrolytes with either anion yield charge efficiencies of greater than 90% to a charge input of 4 C/mmole carbon , and the oxidized products are stable in the electrolyte solution. The electrolytes are far less efficient and the oxidized compounds produced decompose rapidly. Low‐stage products can be isolated following oxidation in PC saturated with , but not when the 0.5 M , PC electrolyte is employed.
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Zhang et al. (1993) studied this question.