Cu/C composites with a good combination of hardness and electrical conductivity fabricated from Cu and graphite by accumulative roll-bonding

Yao, Gongcheng; Mei, Q.S.; Li, J.Y.; Li, Cheng Lin; Ma, Yayun; Chen, F.; Liu, M.

doi:10.1016/j.matdes.2016.07.129

Cited by 56 publications

(13 citation statements)

References 34 publications

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“…[31,32] In this work, the ductile metal-assistant mechanical exfoliation method was used to prepare graphene nanosheets from commercial graphite powder (Figure 2a and Figure S1, Supporting Information). [33] As shown in Figure S2, Supporting Information, when the ductile metal was pressed, a shear force perpendicular to the press direction emerges to make the metal foil thinner. At the same time, the graphite powder attached to the ductile metal surface can be exfoliated because of the shear force-induced interlayer slipping.…”

Section: Originating From Inhomogeneous LI Deposition and Dissolutionmentioning

confidence: 99%

Reversible Deposition of Lithium Particles Enabled by Ultraconformal and Stretchable Graphene Film for Lithium Metal Batteries

et al. 2020

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Originating from inhomogeneous Li deposition and dissolution, the formation of dendritic and/or dead Li lies as a fundamental barrier to the practical implementation of Li metal anodes for high‐energy Li‐ion batteries. Here, an ultraconformal and stretchable solid‐electrolyte interphase (SEI) composed of parallelly stacked few‐layer defect‐free graphene nanosheets, which can deform to remain ultraconformal during the expansion and shrinkage of micro‐sized Li metal particles is reported. The shape‐adaptive graphene protective skin is prepared via a facile mechanical method followed by Li stripping, which enables fast Li‐ion diffusion, and inhibits Li dendrites and Li pulverization. The interlayer slips and wrinkles of the graphene film endow the robust protective skin with high stretchability. This work represents a unique strategy of building ultraconformal and stretchable 2D‐materials‐based protective skins on the surface of Li metal toward high‐energy, long‐life, and safe Li metal batteries.

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Section: Originating From Inhomogeneous LI Deposition and Dissolutionmentioning

confidence: 99%

Reversible Deposition of Lithium Particles Enabled by Ultraconformal and Stretchable Graphene Film for Lithium Metal Batteries

et al. 2020

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“…Copper is an important engineering material used in electrical and electronic industries, due to its excellent electrical and thermal conductivity [1,2,3,4,5,6,7,8]. Copper based composite materials, which contain hard ceramic particles aiming to either improve the tribological properties or decrease the coefficient of thermal expansion of copper matrix, have recently attracted the interest of many researchers [4,5,6,7,8]. These materials are difficult to machine and are mostly fabricated via powder metallurgy, which can provide net-shape fabrication [9,10,11,12].…”

Section: Introductionmentioning

confidence: 99%

The Effects of Sintering Temperature and Addition of TiH2 on the Sintering Process of Cu

et al. 2019

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In this study, effects of sintering temperature and TiH2 on the sintering process of Cu are investigated. During sintering, the oxide in Cu decomposes and generates oxygen, which can become trapped in the material forming closed pores. Therefore, this results in low sintered density. Sintering behavior of Cu can be significantly improved by adding 0.5 wt.% TiH2 which decomposes during sintering, producing hydrogen and effectively reducing the oxide in Cu. Although gas products of the reduction reaction may still be trapped inside the close pores formed near the TiH2 particles and handicap the sintering of Cu, an isothermal treatment at 650 °C can avoid forming close pores. This allows reaction products to dissipate freely from the sample, subsequently increasing its sintered density.

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“…There are two reasons for this phenomenon. Firstly, with the increase of rolling cycles, the number of copper layers increases, which reduces the thickness of these graphite flakes and improves their distribution (Yao et al, 2016). Secondly, these graphite clusters would decompose under shear stress during rolling, and the injection of metal matrix into these graphite clusters would promote their dispersion under the normal direction pressure of rollers [26] (Alizadeh and Salahinejad, 2015).…”

Section: Microstructural Observationmentioning

confidence: 99%

The Bonding Interface and Tribological Properties of Cu–Graphite Sandwich Composites Fabricated via Accumulative Roll-Bonding Processes

Liu

Ding²,

Sun

et al. 2022

Front. Mater.

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Copper–graphite sandwich composites are new functional composites with excellent tribological and mechanical properties. More and more researchers prepare the sandwich composites by accumulative roll-bonding processes due to severe plasticity deformation. The microstructure and properties of copper–graphite sandwich composites prepared by continual annealing and accumulative roll-bonding processes for eight rolling cycles were investigated. The results showed that with the increase of rolling cycles, the dispersion of graphite particles between two copper layers along a rolling direction became more uniform, the pores at the interface between graphite particles and the Cu matrix gradually disappeared, and the hardness of copper–graphite composites gradually increased. After eight rolling cycles, the Vickers hardness of the composites increased by 140.8% as compared with that of annealed pure copper. During friction, the steel balls can meet some graphite particles in the composites rolled by four cycles. The friction coefficient and wear loss of copper–graphite composites gradually decreased with the increase of rolling cycles. Compared with the composites rolled by one cycle, the friction coefficient and wear loss of the composites rolled by eight cycles were reduced by 32.5 and 49.0%, respectively. The main wear mechanism gradually evolved from fatigue wear and abrasive wear to adhesive wear, and then to fatigue wear.

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Cu/C composites with a good combination of hardness and electrical conductivity fabricated from Cu and graphite by accumulative roll-bonding

Cited by 56 publications

References 34 publications

Reversible Deposition of Lithium Particles Enabled by Ultraconformal and Stretchable Graphene Film for Lithium Metal Batteries

Reversible Deposition of Lithium Particles Enabled by Ultraconformal and Stretchable Graphene Film for Lithium Metal Batteries

The Effects of Sintering Temperature and Addition of TiH2 on the Sintering Process of Cu

The Bonding Interface and Tribological Properties of Cu–Graphite Sandwich Composites Fabricated via Accumulative Roll-Bonding Processes

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