Self-heating graphene nanocomposite bricks: A case study in China

11Citations
Citations of this article
17Readers
Mendeley users who have this article in their library.

Abstract

In cold climate regions, the energy associated with indoor heating constitutes a large portion of energy consumption. Increasing energy utilization efficiency is critically important for both economic and environmental reasons. Directly converting electrical energy to thermal energy using joule heating construction elements can save energy and investment to the water pipelines which have been extensively used for indoor heating in China. The fired brick has been extensively used to make pavements, walls and other masonry. Taking advantage of the high dispersion quality of graphene oxide (GO) in water, as well as the firing process used to make fired bricks, graphene nanocomposite bricks with excellent electrical properties and improved mechanical performance were prepared in China. The compressive strength of the bricks showed a substantial increase from 3.15 MPa to 7.21 MPa when GO concentration was 0.1 wt. %. Through applying 5 volts of electrical field within 5 minutes, the nanocomposites can be heated from room temperature to 60 °C, 110 °C and 160 °C for the nanocomposite bricks with graphene concentration of 3 wt. %, 4 wt. % and 5 wt. %, respectively, due to the extremely low percolation threshold (~0.5 wt. %) and high conductivity (10 W_cm at 1 wt. %). The sheets were connected more tightly when the GO content was increased. The thermal efficiency can reach up to 88% based on the applied voltage, measured resistance and temperature rise curves.

Cite

CITATION STYLE

APA

Tang, Z., Lu, D., Gong, J., Shi, X., & Zhong, J. (2020). Self-heating graphene nanocomposite bricks: A case study in China. Materials, 13(3). https://doi.org/10.3390/ma13030714

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free