SME DCC: Cellulose Based Flexible Thermoelectric for IoT applications

Purpose and goal:

The rapid expansion of the Internet of Things (IoT) is leading to the deployment of millions of wireless sensor nodes. These sensors need to be powered by reliable sources, and batteries cannot be the only option. Thermoelectric modules, could be great candidates to replace or reduce the reliance on batteries.

However, the cost and scalability of conventional thermoelectric devices could hinder their widespread implementation. In this project, we investigate the use of alternative paper-based materials and advanced manufacturing methods to address some of these challenges. Expected results and effects:

Thermoelectric modules could be an excellent solution for powering millions of wireless sensor nodes.The direct benefits of using such a solution include reducing both the environmental impact and the costs associated with battery implementation. This project aimed to accelerate the adoption of thermoelectric modules by implementing novel materials and manufacturing methods to cut costs and enhance scalability.

These efforts could serve as a foundation for introducing a new class of thermoelectric modules that are both sustainable and cost-effective Approach and implementation:

The primary objective of this project is to replace conventional flexible substrates, such as polymeric substrates, with paper substrates for the fabrication of conductive thermoelectric electrodes. Conductive inks, such as copper and silver pastes, were used, and an additive approach like screen printing was implemented. This method is more scalable and environmentally friendly compared to etching polymeric substrates.

Advanced curing techniques for high-throughput manufacturing were tested for various conductive inks and electrode fabrication processes.