The effects of crystal orientation and common coal impurities on electronic conductivity in copper–carbon composites

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon Pub Date : 2024-10-21 DOI:10.1016/j.carbon.2024.119711

K. Nepal , C. Ugwumadu , F. Kraft , Y. Al-Majali , D.A. Drabold

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引用次数: 0

Abstract

The electronic conduction properties of copper–graphene composite materials including common coal impurities are studied. Exploring the transport properties for three crystallographic orientations [(111), (110), and (100)] of copper in copper–graphene composites, a strong orientational dependence on electronic conductivity is shown. Graphene exhibits near-ideal registries for (111) and (110) orientations, forming a connected network between grains that enables efficient carrier transport. The influence of non-carbon elements: nitrogen (N), oxygen (O), and sulfur (S) in graphene, representing possible structures in coal-based graphene are investigated. N, O, and S in graphene negatively impact the composite’s electronic conductivity relative to pristine graphene. A new method is introduced for visualizing the spatial distribution of electrical conduction activity in materials using the square of the electronic charge density near the Fermi level, based on the work of Mott. We call this technique the

N^{2}

method.

Abstract Image

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晶体取向和常见煤炭杂质对铜碳复合材料电子导电性的影响

研究了铜-石墨烯复合材料（包括常见的煤杂质）的电子传导特性。通过探索铜-石墨烯复合材料中铜的三种晶体学取向（(111)、(110)和(100)）的传输特性，发现电子传导性与取向关系密切。石墨烯在(111)和(110)取向上表现出近乎理想的注册，在晶粒之间形成了一个连接网络，从而实现了高效的载流子传输。研究了石墨烯中非碳元素：氮（N）、氧（O）和硫（S）的影响，它们代表了煤基石墨烯的可能结构。与原始石墨烯相比，石墨烯中的氮、氧和硫会对复合材料的电子导电性产生负面影响。根据莫特的研究成果，我们引入了一种新方法，利用费米级附近电子电荷密度的平方来观察材料中导电活动的空间分布。我们称这种技术为 N2 方法。

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来源期刊

Carbon 工程技术-材料科学：综合

CiteScore

20.80

自引率

7.30%

发文量

审稿时长

23 days

期刊介绍： The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.