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Silver modification improving on the conductivity of graphene/copper composite: experimental and theoretical research

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Abstract

The effects of silver (Ag) modified on reduced graphene oxide (rGO) to improve the conductivity of rGO/copper composite were investigated via first-principle calculations and experimental investigations. It is found that after Ag ions deposited on rGO, some floccule of Ag deposits are formed and covered on the surface of rGO. The microstructure of rGO@Ag/Cu becomes much more uniform with less defects. The conductivity and electrical contact resistance of rGO@Ag/Cu composite also is better than that of rGO/Cu without any Ag modification. Micro-mechanism shows that the Ag modification can enhance the interface bonding strength of rGO@4Ag/Cu(111) (W = − 3.3213 J/m2) from initial W = − 0.5645 J/m2 of rGO/Cu. Electronic structure illuminates the improving conductivity and electrical contact resistance of rGO@Ag/Cu composite come from the best bridge effect of Ag ions between copper and carbon atoms. Furthermore its good electrical contact resistance is originated from the much more bonding strength of Ag–C than that of Cu–C. Thus our research can give some suggestions in the modification on graphene and the development of new electrical contact materials.

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Funding

This work was supported by the National Natural Science Foundation of China (Grant No. 520711362), the Jiangxi Provincial Natural Science Foundation (Grant No. 20202BABL204024), and the Innovation special fund project funding of Jiangxi graduate (Grant No.YC2018-S357).

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Authors and Affiliations

  1. School of Intelligent Manufacturing Engineering, Jiangxi Institute of Applied Science and Technology, Jiangxi, 330100, China

    Guifa Li, Haiquan Luo, Zengxiang Dong & Hui Wang

  2. School of Material Science and Engineering, Nanchang Hangkong University, Jiangxi, 330063, China

    Guifa Li, Haiquan Luo & Jian Wang

  3. School of Material Science and Engineering, Hunan University, Hunan, 410082, China

    Ping Peng

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  1. Guifa Li
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Contributions

GL contributed to experimental and theoretical scheme and writing––original draft preparation. HL and ZD experimental validation and data curation. HW and JW experimental validation and data curation; PP did examination. All the authors have read and agreed to the published version of the manuscript.

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Correspondence to Guifa Li.

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Li, G., Luo, H., Dong, Z. et al. Silver modification improving on the conductivity of graphene/copper composite: experimental and theoretical research. J Mater Sci: Mater Electron 34, 904 (2023). https://doi.org/10.1007/s10854-023-10328-7

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