| http://www.w3.org/ns/prov#value | - a third step of electrochemically processing the layer consisting essentially of TO and TOOH in a liquid electrolyte comprising a polar solvent selected from propylene carbonate and (C2 H5)2 NSO2 N(C2 H5)2 and an ionizable salt MZ, wherein M is an alkali metal or Ag and Z is a strong acid anion selected from ClO4 -, CF3 SO3 - and N(CF3 SO2)2 -, to incorporate xM+ ions in a first stage and yM+ ions
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