Durable thin film ion conducting coatings are formed on a transparent glass substrate by the controlled deposition of the mixed oxides of lithium:tantalum or lithium:niobium. The coatings provide durable ion transport sources for thin film solid state storage batteries and electrochromic energy conservation...http://www.google.de/patents/US4876628?utm_source=gb-gplus-sharePatent US4876628 - Thin film ion conducting coating
