Thermoelectric Response of Graphite/Na 1.4 Co 2 O 4 Thermocouple on Paper

Abstract There is a demand for high-performance, environmentally friendly, mechanically robust, and economically viable thermoelectric generators (TEGs), with potential applications in electronic and energy conversion units as well as practical preparation techniques. We demonstrate the solid-state based synthesis and thermoelectric behavior of a Graphite/Na1.4Co₂O₄ flexible thermocouple device that was printed on ordinary paper which acts as substrate. Four pair of TE legs fabricated with alternate graphite and Na1.4Co₂O₄ traces, yielding of electrical conductivity, Seebeck coefficient and power factor for graphite traces 3333 Ω⁻¹m⁻¹, 26.78 µVK⁻¹ & 2.39 µWm⁻¹K⁻² and Na1.4Co₂O₄ traces 331 Ω⁻¹m⁻¹, 67.97 µVK⁻¹ & 1.53 µWm⁻¹K⁻², respectively are noteworthy. Our thermoelectric generator is cost effective and ecofriendly which provides good output performance. The thermocouple device's exhibits output voltage of 31.0 mV, this work provides insight into the potential for flexible thermoelectric heading beyond.