gizmag: Wherever there’s enough of a temperature gradient between two surfaces, thermoelectric materials can be used to generate an electric current. If a coat were made with http://www.gizmag.com/power-felt-thermoelectric-material/21572/">thermoelectric felt, for instance, a current could be generated by exploiting the difference between the wearer’s body heat and the cold outdoor air. Now, scientists have developed an inexpensive new type of thermoelectric material, that could make the technology more commercially viable. .. Continue Reading http://www.gizmag.com/tetrahedrite-thermoelectric-material/25219/">Scientists create inexpensive new thermoelectric material