Water-based nuclear battery can be used to generate electrical energy
http://munews.missouri.edu/news-release ... al-energy/
The battery uses a radioactive isotope called strontium-90 that boosts electrochemcial energy in a water-based solution. A nanostructured titanium dioxide electrode (the common element found in sunscreens and UV blockers) with a platinum coating collects and effectively converts energy into electrons.
Nature Full Text: http://www.nature.com/srep/2014/140611/ ... 05249.html