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Atomic understanding of Kelvin-Helmholtz instability at single-crystal copper interface with an initial corrugated disturbance under different tangential velocities 认领 引用
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作者 Jianhao Shi Xi Wang +2 位作者 Xiaomian Hu Zihui Wu Hao Pan 《Matter and Radiation at Extremes》 SCIE EI CAS CSCD 2026年第3期89-106,共18页
The evolutionary mechanisms of Kelvin-Helmholtz instability at single-crystal copper-copper interfaces with initial sinusoidal perturbation under different tangential velocity discontinuities(0.5,1.0,2.0,and 3.0 km/s)... The evolutionary mechanisms of Kelvin-Helmholtz instability at single-crystal copper-copper interfaces with initial sinusoidal perturbation under different tangential velocity discontinuities(0.5,1.0,2.0,and 3.0 km/s)are investigated through molecular dynamics simulations.Distinct characteristics of stable and unstable interface morphologies are identified.The interface contact length,rather than the perturbation amplitude,extracted by an edge detection method,is selected as an appropriate physical quantity to indicate the state of the interface.The interface is stable for a tangential velocity discontinuity of 0.5 km/s,since the contact length remains essentially unchanged,but it is unstable for the other three velocities,since the contact length increases continuously.The contact lengths of unstable interfaces exhibit distinctly different nonlinear growth patterns.The microstructural evolutions for stable and unstable interfaces are also revealed.Sparse distributions of microstructures,such as dislocations and stacking faults,are observed in a stable interface,whereas extensive propagation,indicating large areas of plastic deformation,is found in unstable interfaces.Furthermore,a large number of metastable phase atoms emerge during plastic deformation,and an amorphous belt whose thickness grows as the velocity increases is formed near unstable interfaces.A thicker amorphous belt corresponds to greater plastic work,which produces a wider high-temperature belt near the interface.It also leads to the formation of a thicker shear belt with a high gradient velocity profile,creating a dynamic condition to promote the instability and thus distort the interface. 展开更多
关键词 Single Crystal Copper sinusoidal perturbation Molecular Dynamics Simulations tangential velocity discontinuities Interface Morphology edge detection methodis Tangential Velocity molecular dynamics simulationsdistinct
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MoS2nanosheets with expanded interlayer spacing for ultra-stable aqueous Mg-ion hybrid supercapacitor 认领 引用 被引量：6
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作者 Guodong Pan Junfeng Li +7 位作者 Lu Han Wenwu Peng Xingtao Xu Ting Lu Mohammed A.Amin Yusuke Yamauchi Min Xu Likun Pan 《Inorganic Chemistry Frontiers》 SCIE EI 2022年第8期1666-1673,共8页
Aqueous magnesium ion supercapacitors(MISs)have attracted attention due to their safety,low cost and environmental friendliness.However,the cycling stability of MISs is usually not ideal due to magnesium ion plating i... Aqueous magnesium ion supercapacitors(MISs)have attracted attention due to their safety,low cost and environmental friendliness.However,the cycling stability of MISs is usually not ideal due to magnesium ion plating in/stripping from the negative electrode materials.Here,we demonstrate that MoS2with expanded interlayer spacing(E-MoS2),obtained via a facile method,is a prospective negative electrode material for rechargeable MISs,because the expanded layer spacing reduces ion diffusion resistance and provides more active sites for ion interaction. 展开更多
关键词 negative electrode material negative electrode materialsherewe MoS facile methodis magnesium ion expanded interlayer spacing expanded layer spacing supercapacitors
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