Copper nanoparticles spaced 3D graphene films for binder-free lithium-storing electrodes

Guo, Dongjie; Wei, Ziying; Shi, Bo; Wang, Shiwen; Wang, Lizhen; Tan, Wei; Fang, Shaoming

doi:10.1039/c6ta01347c

Cited by 21 publications

(9 citation statements)

References 65 publications

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“…In order to understand, the appropriate reasons behind the above influenced behaviour of properties, it is much needed to study the solidification and organization of metallic material in a confined region between graphene sheets. Reported studies [14][15][16] suggest that the metal atoms make a sheathing organization over the graphene substrate during the processing of nano-composite systems. The utmost interface area between the metal -matrix and graphene substrate enhance the strength of the metal-matrix graphene composite against during external load applications.…”

Section: Introductionmentioning

confidence: 99%

Evolution of nanostructure and mechanical properties of silver nano-particle in the confined region between graphene sheets: An atomistic investigation

Kumar

Das

Pattanayek

2018

Computational Materials Science

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Solidification and organization of silver nano-particle in a confined region between graphene sheets, shows much importance for the various application in the field of biomedical, electrochemical, coating materials, catalyst, metal-matrix nanocomposite etc. To understand the processes involved, we have studied the atomistic behaviour of solidification, organizations and mechanical properties of silver nano-particle in the bulk and as well as in confined region by molecular dynamics simulations. In the bulk, silver nano-particle shows phase transition from liquid to crystalline phase at a temperature, T ≈ 1030 ± 25 K. However, in the confined region, silver nano-particle depicts the same phase transition at a relatively higher temperature. The tensile stress, initiation of cracks and subsequent detachment of silver during tensile deformation depends upon the temperature and interfacial interactions. The tuning of 12-6 Lennard Jones interaction potential energy parameter between graphene and silver (− ε) Ag C drastically influenced the phase transition of silver nano-particle in the confined region. At a high interaction potential energy (− ε) Ag C , silver nano-particle shows good wettability over the graphene sheets and depicts the phase transition at a higher temperature compared to lower interaction potential energy.

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Section: Introductionmentioning

confidence: 99%

Evolution of nanostructure and mechanical properties of silver nano-particle in the confined region between graphene sheets: An atomistic investigation

Kumar

Das

Pattanayek

2018

Computational Materials Science

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“…Studies reported to date [9][10][11][12][13][14][15][16][17][18][19][20] suggest that metal atoms make a sheathing arrangement on the graphene surface. The maximum contact area between the metal matrix and graphene during the metal sheathing process enhances the strength of the interface.…”

Section: Introductionmentioning

confidence: 99%

Effect of applied force and atomic organization of copper on its adhesion to a graphene substrate

Kumar

2017

RSC Adv.

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“…Electrolyte ion migration drives the electromechanical response of IPMC actuators, − and thus electrochemical behaviors would affect their electromechanical performance. To analyze the electrochemical behaviors, the EIS spectra of PVDF family IPMCs in water and IL environments were measured (Figure ).…”

Section: Resultsmentioning

confidence: 99%

Hydrophilic Poly(vinylidene Fluoride) Film with Enhanced Inner Channels for Both Water- and Ionic Liquid-Driven Ion-Exchange Polymer Metal Composite Actuators

Guo

Han

Huang

et al. 2019

ACS Appl. Mater. Interfaces

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This study presents a novel and facile strategy to fabricate a hydrophilic poly(vinylidene fluoride) (PVDF) electrolyte film with enhanced inner channels for a highperformance and cost-effective ion-exchange polymer metal composite (IPMC) actuator. The resultant PVDF composite film is composed of hierarchical micro/nanoscale structures: well-defined polymer grains with a diameter of ∼20 μm and much finer particles with a diameter of ∼390 nm, producing three-dimensional interconnected, hierarchical inner channels to facilitate ion migration of IPMC. Interestingly, the electrolyte matrix film has a high porosity of 15.8% and yields a high water uptake of 44.2% and an ionic liquid (IL, [EMIm]•[BF 4 ]) uptake of 38.1% to make both water-driven and IL-driven IPMC actuators because of the introduction of polar polyvinyl pyrrolidone. Compared to the conventional PVDF/IL-based IPMC, both water-driven and IL-driven PVDF-based IPMCs exhibit high ion migration rates, thus effectively improving the actuation frequency and producing remarkably higher levels of actuation force and displacement. Specifically, the force outputs are increased by 13.4 and 3.0 folds, and the displacement outputs are increased by 2.2 and 1.9 folds. Using an identical electrolyte matrix, water-driven IPMC exhibits stronger electromechanical performance, benefiting to make IPMC actuator with high levels of force and power outputs, whereas IL-driven IPMC exhibits a more stable electromechanical performance, benefiting to make long lifetime IPMC actuator in air. Thus, the resultant IPMCs are promising in the design of artificial muscles with tunable electromechanical performance for flexible actuators or displacement/vibration sensors at low cost. KEYWORDS: ionic exchange polymer metal composite (IPMC), electromechanical response, poly(vinylidene fluoride) (PVDF), polyvinyl pyrrolidone (PVP), ionic liquid (IL), inner channel

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Copper nanoparticles spaced 3D graphene films for binder-free lithium-storing electrodes

Abstract: Using a copper nanoparticle-spaced graphene film as the anode, a newly developed lithium-ion battery exhibits a high charge/discharge capacity, an excellent reversibility, a high coulombic efficiency, and a good rate capacity.

Cited by 21 publications

References 65 publications

Evolution of nanostructure and mechanical properties of silver nano-particle in the confined region between graphene sheets: An atomistic investigation

Evolution of nanostructure and mechanical properties of silver nano-particle in the confined region between graphene sheets: An atomistic investigation

Effect of applied force and atomic organization of copper on its adhesion to a graphene substrate

Hydrophilic Poly(vinylidene Fluoride) Film with Enhanced Inner Channels for Both Water- and Ionic Liquid-Driven Ion-Exchange Polymer Metal Composite Actuators

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