Single-crystallization of electrolytic copper foils

Li，Xingguang1; Zhao，Mengze1; Guo，Quanlin1; Zhao，Chong2; Ding，Mingchao3; Zou，Dingxin4; Ding，Zhiqiang2; Zhang，Zhiqiang2; He，Menglin2; Liu，Kehai2; Wu，Muhong5; Zhang，Zhihong6; Wang，Enge2,5; Fu，Ying2; Liu，Kaihui1,2,5; Zhang，Zhibin1

2024-03-20

10.1016/j.jmst.2023.07.039

Journal of Materials Science and Technology   Impact Factor & Quartile

1005-0302

1941-1162

Depending on the production process, copper (Cu) foils can be classified into two types, i.e., rolled copper (r-Cu) foils and electrolytic copper (e-Cu) foils. Owing to their high electrical conductivity and ductility at low cost, e-Cu foils are employed extensively in modern industries and account for more than 98% of the Cu foil market share. However, industrial e-Cu foils have never been single-crystallized due to their high density of grain boundaries, various grain orientations and vast impurities originating from the electrochemical deposition process. Here, we report a methodology of transforming industrial e-Cu foils into single crystals by facet copy from a single-crystal template. Different facets of both low and high indices are successfully produced, and the thickness of the single crystal can reach 500 µm. Crystallographic characterizations directly recognized the single-crystal copy process, confirming the complete assimilation impact from the template. The obtained single-crystal e-Cu foils exhibit remarkably improved ductility (elongation-to-fracture of 105% vs. 25%), fatigue performance (the average numbers of cycles to failure of 1600 vs. 200) and electrical property (electrical conductivity of 102.6% of the international annealed copper standard (IACS) vs. 98.5%) than original ones. This work opens up a new avenue for the preparation of single-crystal e-Cu foils and may expand their applications in high-speed, flexible, and wearable devices.

Electrolytic copper foil Facet copy Grain growth Mechanical property Single-crystallization

SCI

English

Others

National Natural Science Foundation of China[52025023];

Materials Science ; Metallurgy & Metallurgical Engineering

Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:001077585400001

JOURNAL MATER SCI TECHNOL

MATERIALS SCIENCE

2-s2.0-85171129129

Scopus

1.State Key Laboratory for Mesoscopic Physics,Frontiers Science Centre for Nano-optoelectronics,School of Physics,Peking University,Beijing,100871,China
2.Songshan Lake Materials Laboratory,Dongguan,523808,China
3.Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing,100190,China
4.Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
5.International Centre for Quantum Materials,Collaborative Innovation Centre of Quantum Matter,Peking University,Beijing,100871,China
6.State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing,100083,China

Li，Xingguang,Zhao，Mengze,Guo，Quanlin,et al. Single-crystallization of electrolytic copper foils[J]. Journal of Materials Science and Technology,2024,176:112-118.

Li，Xingguang.,Zhao，Mengze.,Guo，Quanlin.,Zhao，Chong.,Ding，Mingchao.,...&Zhang，Zhibin.(2024).Single-crystallization of electrolytic copper foils.Journal of Materials Science and Technology,176,112-118.

Li，Xingguang,et al."Single-crystallization of electrolytic copper foils".Journal of Materials Science and Technology 176(2024):112-118.