Flexible Thermoelectric Reduced Graphene Oxide/Ag2S/Methyl Cellulose Composite Film Prepared by Screen Printing Process

Jianjun Wang; Yong Du; Jie Qin; Lei Wang; Qiufeng Meng; Zhenyu Li; Shirley Z Shen

doi:10.3390/polym14245437

Flexible Thermoelectric Reduced Graphene Oxide/Ag₂S/Methyl Cellulose Composite Film Prepared by Screen Printing Process

Polymers (Basel). 2022 Dec 12;14(24):5437. doi: 10.3390/polym14245437.

Authors

Jianjun Wang¹, Yong Du¹, Jie Qin¹, Lei Wang¹, Qiufeng Meng¹, Zhenyu Li², Shirley Z Shen³

Affiliations

¹ School of Materials Science and Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, China.
² The Center of Functional Materials for Working Fluids of Oil and Gas Field, Sichuan Engineering Technology Research Center of Basalt Fiber Composites Development and Application, Southwest Petroleum University, Chengdu 610500, China.
³ CSIRO Manufacturing, Private Bag 10, Clayton South, Melbourne 3169, Australia.

Abstract

As an organic-inorganic thermoelectric composite material, a flexible, reduced graphene oxide (rGO)/silver sulfide (Ag₂S)/methyl cellulose (MC) film was fabricated by a two-step method. Firstly, a rGO/Ag₂S composite powder was prepared by a chemical synthesis method, and then, the rGO/Ag₂S/MC composite film was prepared by a combined screen printing and annealing treatment process. The rGO and rGO/Ag₂S composite powders were evenly dispersed in the rGO/Ag₂S/MC composite films. A power factor of 115 μW m^-1 K^-2 at 520 K was acquired for the rGO/Ag₂S/MC composite film, which is ~958 times higher than the power factor at 360 K (0.12 μW m^-1 K^-2), mainly due to the significant increase in the electrical conductivity of the composite film from 0.006 S/cm to 210.18 S/cm as the test temperature raised from 360 K to 520 K. The as-prepared rGO/Ag₂S/MC composite film has a good flexibility, which shows a huge potential for the application of flexible, wearable electronics.

Keywords: flexible; methyl cellulose; reduced graphene oxide; silver sulfide; thermoelectric composites.

Abstract

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