Issue 21, 2022

Two-dimensional cobalt telluride as a piezo-tribogenerator

Abstract

Two-dimensional (2D) materials have been shown to be efficient in energy harvesting. Here, we report the use of waste heat to generate electricity via the combined piezoelectric and triboelectric properties of 2D cobalt telluride (CoTe2). The piezo-triboelectric nanogenerator (PTNG) produced an open-circuit voltage of ∼5 V under 1 N force and the effect of temperature in the range of 305–363 K shows a four-fold energy conversion efficiency improvement. The 2D piezo-tribogenerator shows excellent characteristics with a maximum voltage of ∼10 V, fast response time, and high responsivity. Density functional theory was used to gain further insights and validation of the experimental results. Our results could lead to energy harvesting approaches using 2D materials from various thermal sources and dissipating waste heat from electronic devices.

Graphical abstract: Two-dimensional cobalt telluride as a piezo-tribogenerator

Supplementary files

Article information

Article type
Paper
Submitted
08 jan. 2022
Accepted
27 mar. 2022
First published
30 mar. 2022

Nanoscale, 2022,14, 7788-7797

Two-dimensional cobalt telluride as a piezo-tribogenerator

S. D. Negedu, R. Tromer, C. C. Gowda, C. F. Woellner, F. E. Olu, A. K. Roy, P. Pandey, D. S. Galvao, P. M. Ajayan, P. Kumbhakar and C. S. Tiwary, Nanoscale, 2022, 14, 7788 DOI: 10.1039/D2NR00132B

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