| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Chen, Hao
Politecnico di Milano
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2023Study of process parameters and characteristics properties of W coatings deposited by rf plasma sputteringcitations
- 2021Insight into the Solid Electrolyte Interphase Formation in Bis(fluorosulfonyl)Imide Based Ionic Liquid Electrolytescitations
- 2021Powder Bed Fusion of nickel-based superalloys: A reviewcitations
- 2021Near-IR transparent conductive amorphous tungsten oxide thin layers by non-reactive radio-frequency magnetron sputteringcitations
- 2020‘Unit cell’ type scan strategies for powder bed fusioncitations
- 2020Unveiling the Working Mechanism of Graphene Bubble Film/Silicon Composite Anodes in Li-Ion Batteries: From Experiment to Modelingcitations
- 2018Utilizing room temperature liquid metals for mechanically robust silicon anodes in lithium-ion batteriescitations
- 2013The effect of prior ferrite formation on bainite and martensite transformation kinetics in advanced high-strength steelscitations
- 2013Application of interrupted cooling experiments to study the mechanism of bainitic ferrite formation in steelscitations
- 2012Analysis of the stagnant stage in diffusional phase transformations starting from austenite-ferrite mixturescitations
Places of action
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article
Unveiling the Working Mechanism of Graphene Bubble Film/Silicon Composite Anodes in Li-Ion Batteries: From Experiment to Modeling
Abstract
<p>In spite of the fact that there are plenty of recent studies on Si/graphene composite anodes, the influence of graphene on Li diffusion at the interface and lithiation associated mechanical behavior have not been well-understood. Furthermore, it is still a technical challenge to maintain a high capacity and an ultralong cycle life with high mass loading. Using a simple self-assembly approach, we have developed an all-integrated architecture of Si nanoparticles (SiNPs) encapsulated inside reduced graphene oxide (rGO) bubble films anchored in a 3D rGO macroporous network (encapsulated Si@rGO) as an anode for Li-ion batteries (LIBs). The enhanced electrochemical performance and structural stability of the anode are accomplished by the unique multifunctional rGO bubble film, which smoothly wraps SiNPs with notable void spaces. Its residual functional groups covalently bind with SiNPs, preventing their detachment from the electrode. The bubble wrap together with the outermost 3D framework accommodate the volume change, contributing to a stabilized solid electrolyte interphase (SEI) layer while maintaining ionic and electronic conductive pathways. Density functional theory (DFT) simulations show that the graphene coating boosts the mobility of the Li atoms at the Si-graphene interface. Molecular dynamics (MD) simulations confirm that graphene bubble film can effectively control the stress build-up near the Si surface, maintaining the structural integrity of the anode. The encapsulated Si@rGO anode with a mass loading of 2.6 mg cm<sup>-2</sup> demonstrates exceptional cycling stability and superior rate capabilities. The anode demonstrates a high reversible capacity of 1346 mAh g<sup>-1</sup> after 200 cycles at 500 mA g<sup>-1</sup>. Even at a high current density of 2.5 A g<sup>-1</sup>, a reversible capacity of 998 mAh g<sup>-1</sup> is maintained after 1000 cycles with a capacity retention of 97%.</p>