Correspondingly the zinc electrode is the anode. The anode is always the negative electrode. Leakage depends on capacitance, voltage, temperature and the chemical stability of the electrode/electrolyte combination. Such as when using a Gas diffusion electrode. This allows for better conduction between electrode and skin. The simplest approach is a monopolar needle electrode. The first step before insertion of the needle electrode is skin preparation. The resulting ions are collected at a negative electrode. Ions are electrostatically trapped in an orbit around a central, spindle shaped electrode. This is made possible by the flux core in the tubular consumable electrode. The other, negative electrode is positioned above the flame. The tool electrode in wire EDM is simply a wire. This redox reaction occurs at a platinized platinum electrode. Pseudocapacitors were created through faradaic redox reactions that occur within the active electrode materials. He called ions in direct contact with the electrode "specifically adsorbed ions".