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Experimental and simulation study on space charge characteristics of epoxy resin filled with graphene oxide

Experimental and simulation study on space charge characteristics of epoxy resin filled with graphene oxide
Experimental and simulation study on space charge characteristics of epoxy resin filled with graphene oxide

Graphene has attracted much attention due to its advanced properties. In previous work, the relationship between temperature and the conductivity of epoxy-based nanocomposite filled with graphene oxide has been experimentally studied. To understand the charge transport behaviour, the space charge characteristics at different temperatures and field strengths are measured with an improved pulsed electroacoustic measurement system, which is designed for high-temperature space charge measurement. From the measurement results, epoxy resin (ER) filled with multi-layer graphene oxide (MGO/ER) shows suppressed charge migration while ER filled with single-layer graphene oxide (SGO/ER) shows a hetero charge accumulation, which is assumed to be caused by the partial reduction of graphene oxide to graphene. Compared to pure ER, the apparent mobility of the nanocomposites is smaller while the trap depth and number of trapped charges are larger, which is probably caused by the introduction of traps. In the simulation, the relationship between mobility, trap depth, trap density and charge distribution are firstly studied. Then the calculated values of mobility and trap depth are given to the parameters to compare the simulated charge profiles with experiment results. The simulation results agree well qualitatively with the experimental results, giving some support for the proposed explanations.

1751-8822
426-434
Zhang, Siyu
67f903b2-651d-4ad8-ad57-9261ec857064
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Zhang, Hongliang
f3441d79-2463-4f88-9e49-689245571a42
Yan, Jiaqi
1b1740b8-3713-4185-8195-b9646c033655
Liu, Peng
d8de1930-c660-4f85-98b2-d825f8a49de9
Peng, Zongren
8fb15e49-3c15-403f-91c5-eda18ea36058
Zhang, Siyu
67f903b2-651d-4ad8-ad57-9261ec857064
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Zhang, Hongliang
f3441d79-2463-4f88-9e49-689245571a42
Yan, Jiaqi
1b1740b8-3713-4185-8195-b9646c033655
Liu, Peng
d8de1930-c660-4f85-98b2-d825f8a49de9
Peng, Zongren
8fb15e49-3c15-403f-91c5-eda18ea36058

Zhang, Siyu, Chen, George, Zhang, Hongliang, Yan, Jiaqi, Liu, Peng and Peng, Zongren (2019) Experimental and simulation study on space charge characteristics of epoxy resin filled with graphene oxide. IET Science, Measurement & Technology, 13 (3), 426-434. (doi:10.1049/iet-smt.2018.5398).

Record type: Article

Abstract

Graphene has attracted much attention due to its advanced properties. In previous work, the relationship between temperature and the conductivity of epoxy-based nanocomposite filled with graphene oxide has been experimentally studied. To understand the charge transport behaviour, the space charge characteristics at different temperatures and field strengths are measured with an improved pulsed electroacoustic measurement system, which is designed for high-temperature space charge measurement. From the measurement results, epoxy resin (ER) filled with multi-layer graphene oxide (MGO/ER) shows suppressed charge migration while ER filled with single-layer graphene oxide (SGO/ER) shows a hetero charge accumulation, which is assumed to be caused by the partial reduction of graphene oxide to graphene. Compared to pure ER, the apparent mobility of the nanocomposites is smaller while the trap depth and number of trapped charges are larger, which is probably caused by the introduction of traps. In the simulation, the relationship between mobility, trap depth, trap density and charge distribution are firstly studied. Then the calculated values of mobility and trap depth are given to the parameters to compare the simulated charge profiles with experiment results. The simulation results agree well qualitatively with the experimental results, giving some support for the proposed explanations.

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More information

Accepted/In Press date: 10 December 2018
e-pub ahead of print date: 16 January 2019
Published date: 2 May 2019

Identifiers

Local EPrints ID: 431769
URI: http://eprints.soton.ac.uk/id/eprint/431769
ISSN: 1751-8822
PURE UUID: 6cced33f-8b1e-4c77-88b2-85b373db03cb

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Date deposited: 14 Jun 2019 16:30
Last modified: 14 Jun 2019 16:30

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Contributors

Author: Siyu Zhang
Author: George Chen
Author: Hongliang Zhang
Author: Jiaqi Yan
Author: Peng Liu
Author: Zongren Peng

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