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Science & Tech.
Pradeep Kumar

24/02/21 11:30 AM IST

waste heat to electricity

In news

Scientists have found a new Lead (Pb) free material which can efficiently convert waste heat to power our small home equipment and automobiles.

Highlights
  • Thermoelectric energy conversion allows generation of electrical voltage when one end of a material is heated while keeping the other side cold.
  • It entails fitting in three seemingly different properties into a single material-- high electrical conductivity of metals, high thermoelectric sensitivity of semiconductors, and low thermal conductivity of glasses.
  • Most efficient thermoelectric materials developed by scientists so far use Lead (Pb) as a major constituent element, restricting their use for mass-market applications.
Major finding

Lead-free material called Cadmium (Cd) doped Silver Antimony Telluride (AgSbTe2) which can efficiently allow recovery of electricity from ‘waste heat’ marking a paradigm shift in the thermoelectric puzzle. 

Source: PIB

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