Electrodes include a coating that provides a barrier to fluids and ions within a biological environment. The coating increases the overpotential of the electrode. The coating permits the introduction and use of the electrodes into biological environments without the detrimental complications of electro-chemical...http://www.google.co.uk/patents/US7463917?utm_source=gb-gplus-sharePatent US7463917 - Electrodes for sustained delivery of energy
