Crosslinking-modulated direct-current conductivity of XLPE-PS composite via charge trap characteristics
Crosslinking-modulated direct-current conductivity of XLPE-PS composite via charge trap characteristics
Low direct-current (DC) conductivity is one of the most desired characteristics for crosslinked polyethylene (XLPE) as a high-voltage DC cable insulation material. In this Letter, a correlation between the DC conductivity and cross-linking characteristics of XLPE-polystyrene (PS) composites at 50 C was studied. Experimental results show that by adjusting the cross-linking structure, different trap distribution characteristics for XLPE-PS composites were realized. With the increase in the cross-linking agent content, DC conductivities of XLPE-PS composites tend to decrease, and the introduced average trap depth increases correspondingly. An increase of 0.07 eV for average charge trap
depth in XLPE-PS composites could be acquired in the test range. It is considered that the increase in the average trap depth reduces the carrier mobility, contributing to the reduction of DC conductivity for XLPE-PS composites. Thus, the DC conductivity and average trap depth of XLPE composites show a strong relevance. The results suggest that the interaction between PS particles and the matrix introduced by cross-linking plays a dominant role in determining the charge conduction for XLPE-PS composites.
Chen, George
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Cao, Liang
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Zhong, Lisheng
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Li, Yinge
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Li, Wenpeng
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Gao, Jinghui
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Xu, Lingna
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Chen, George
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Cao, Liang
c68abd6b-5347-40c8-9e56-b3b4725355ac
Zhong, Lisheng
d18cec7f-eeb2-4154-8e80-953551acd861
Li, Yinge
42a3616f-ecb8-4cd0-8d8d-1ba53ee6698a
Li, Wenpeng
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Gao, Jinghui
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Xu, Lingna
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Chen, George, Cao, Liang, Zhong, Lisheng, Li, Yinge, Li, Wenpeng, Gao, Jinghui and Xu, Lingna
(2022)
Crosslinking-modulated direct-current conductivity of XLPE-PS composite via charge trap characteristics.
Applied Physics Letters, 120 (4), [041902].
(doi:10.1063/5.0076663).
Abstract
Low direct-current (DC) conductivity is one of the most desired characteristics for crosslinked polyethylene (XLPE) as a high-voltage DC cable insulation material. In this Letter, a correlation between the DC conductivity and cross-linking characteristics of XLPE-polystyrene (PS) composites at 50 C was studied. Experimental results show that by adjusting the cross-linking structure, different trap distribution characteristics for XLPE-PS composites were realized. With the increase in the cross-linking agent content, DC conductivities of XLPE-PS composites tend to decrease, and the introduced average trap depth increases correspondingly. An increase of 0.07 eV for average charge trap
depth in XLPE-PS composites could be acquired in the test range. It is considered that the increase in the average trap depth reduces the carrier mobility, contributing to the reduction of DC conductivity for XLPE-PS composites. Thus, the DC conductivity and average trap depth of XLPE composites show a strong relevance. The results suggest that the interaction between PS particles and the matrix introduced by cross-linking plays a dominant role in determining the charge conduction for XLPE-PS composites.
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5.0076663
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Accepted/In Press date: 12 January 2022
e-pub ahead of print date: 28 January 2022
Additional Information:
Funding Information:
This work was supported by the National Key Research and Development Program of China (Grant No. 2016YFB0900702) and the Fundamental Research Funds for the Central Universities (Grant No. SWU120069).
Publisher Copyright:
© 2022 Author(s).
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Local EPrints ID: 473019
URI: http://eprints.soton.ac.uk/id/eprint/473019
ISSN: 0003-6951
PURE UUID: a015bdf0-306a-45b2-b144-6410fe9ab28f
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Date deposited: 06 Jan 2023 18:27
Last modified: 16 Mar 2024 23:29
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Contributors
Author:
George Chen
Author:
Liang Cao
Author:
Lisheng Zhong
Author:
Yinge Li
Author:
Wenpeng Li
Author:
Jinghui Gao
Author:
Lingna Xu
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