Climate change is the defining issue of our time. The current energy system is not sustainable and major transitions are needed. In 2021, The International Energy Agency (IEA) reported that over 60% of the total primary energy demand was wasted as heat. Studies have estimated that 63% of this waste heat is low-grade thermal energy i.e., at a temperature below 100°C. Improving energy efficiency by focusing on waste heat recovery is widely recognized as a crucial tool to mitigate the increasing global energy demands and reduce GHG emissions. Low-grade thermal energy harvesting poses significant challenges to traditional thermoelectric systems. This thesis work reports the implementation and analysis of a method for the conversion of low-grade heat into energy.