TY - JOUR
T1 - Enhancement of power factor of screen printed polyaniline /graphite based flexible thermoelectric generator by structural modifications
AU - Nayak, Ramakrishna
AU - Shetty, Prakasha
AU - M, Selvakumar
AU - Rao, Ashok
AU - Rao, K. Mohan
AU - K, Gurukrishna
AU - Mangavati, Suraj
N1 - Funding Information:
The authors wish to express their sincere gratitude to the Manipal Institute of Technology, MAHE, Manipal, for the laboratory facility and support in this research work. Authors (Ashok Rao) acknowledge DST-FIST , Government of India (Grant number FST/PS-I/2017/8 ), and (K. Mohan Rao) DAE-BRNS , Government of India (Grant number: 2010/34/22/BRNS/1164-28-07-2010 ). The authors are also thankful to Dr. Shivamurthy, Department of Mechanical and Manufacturing Engineering of Manipal Institute of Technology, and Mr. Bharath Babu, M/s Manipal Technologies Ltd, Manipal, for their technical support during this work.
Funding Information:
The authors wish to express their sincere gratitude to the Manipal Institute of Technology, MAHE, Manipal, for the laboratory facility and support in this research work. Authors (Ashok Rao) acknowledge DST-FIST, Government of India (Grant number FST/PS-I/2017/8), and (K. Mohan Rao) DAE-BRNS, Government of India (Grant number: 2010/34/22/BRNS/1164-28-07-2010). The authors are also thankful to Dr. Shivamurthy, Department of Mechanical and Manufacturing Engineering of Manipal Institute of Technology, and Mr. Bharath Babu, M/s Manipal Technologies Ltd, Manipal, for their technical support during this work.
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/11/20
Y1 - 2022/11/20
N2 - The work presented in this paper demonstrates an experimental path to improve the performance of a screen-printed flexible thermoelectric generator through optimization of leg materials, geometrical and structural parameters of the leg, and the viscosity of screen-printed ink. A thin and porous screen-printed leg structure improves the Seebeck coefficient and power output by 11.53 and 8.52 times, respectively than a thick and denser leg structure. A trapezoidal design increases the Seebeck coefficient, and power output by 2.72 and 3.82 times, respectively, compared with a rectangular leg structure. The observed increment in the power output using silver as contact material is about 2.17 times higher than graphene. Screen ink with higher ink viscosity results in a 47 % reduction of transient thermal conductivity and an increased power factor by 20.33 times. The rectangular leg produces the maximum power factor of 1.30 × 10−12 µWmm−2K−2. The improvement possible in the power output by controlling the leg structure's porosity is around 752.71 %. The result indicates that optimization of ink viscosity and porosity of ink film has significant influence in enhancing the performance of FTEG than its leg shapes and material properties.
AB - The work presented in this paper demonstrates an experimental path to improve the performance of a screen-printed flexible thermoelectric generator through optimization of leg materials, geometrical and structural parameters of the leg, and the viscosity of screen-printed ink. A thin and porous screen-printed leg structure improves the Seebeck coefficient and power output by 11.53 and 8.52 times, respectively than a thick and denser leg structure. A trapezoidal design increases the Seebeck coefficient, and power output by 2.72 and 3.82 times, respectively, compared with a rectangular leg structure. The observed increment in the power output using silver as contact material is about 2.17 times higher than graphene. Screen ink with higher ink viscosity results in a 47 % reduction of transient thermal conductivity and an increased power factor by 20.33 times. The rectangular leg produces the maximum power factor of 1.30 × 10−12 µWmm−2K−2. The improvement possible in the power output by controlling the leg structure's porosity is around 752.71 %. The result indicates that optimization of ink viscosity and porosity of ink film has significant influence in enhancing the performance of FTEG than its leg shapes and material properties.
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U2 - 10.1016/j.jallcom.2022.166298
DO - 10.1016/j.jallcom.2022.166298
M3 - Article
AN - SCOPUS:85134778423
SN - 0925-8388
VL - 922
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 166298
ER -