PSi@SiOx/Nano-Ag composite derived from silicon cutting waste as high-performance anode material for Li-ion batteries

Construction of a LiF-Rich and Stable SEI Film by Designing a Binary, Ion-, and Electron-Conducting Buffer Interface on the Si Surface

“…To verify that the new bright spots are Ag particles, XPS is performed (Figure d). The two sets of peaks at 367.8 eV (Ag 3d 5/2 ) and 373.8 eV (Ag 3d 3/2 ) in the Ag 3d spectrum of the Si@MA*Ag powder proves the existence of Ag particles. , Also, this can also be supported by element mapping (Figure e), that is, both Si and Ag can be detected in the Si@MA*Ag powder, and Ag particles are evenly distributed around the Si particles.…”

“…In addition, it is important to note that the MA content is critical, as too much MA content leads to a decrease in rate capability due to the lack of electronic conductivity (Figure S8). To further elucidate the effect mechanism of the MA*Ag modifier on the Li + storage behavior of the Si anode, CV curves of the bare Si and Si@MA*Ag electrodes at different scanning rates are conducted. , As shown in Figure e, the current of the redox peak increases as the scanning rate increases, illustrating the rapid reaction kinetics and high reversibility of the Li + storage process. Figure f indicates that the electrochemical reaction kinetics of the bare Si electrode is controlled by diffusion, while that of the Si@MA*Ag electrode is dominated by capacitance.…”

“…To construct stable SEI films on the Si surfaces, many efforts have been made in terms of Si structures, − binders, − conductive agents, − and electrolyte additives. − Among various attempts, interfacial engineering to construct artificial SEI films on Si surfaces is one of the effective strategies to improve the electrochemical performance of the Si anodes. − So far, the reported interface materials include carbon coatings, − zero-strain materials, , organic small molecules, , organic polymers, , etc. In addition, there are also reports of incorporating metal particles with interfacial engineering to offer remarkable conductivity, such as decorating the surface of carbon-encapsulated Si nanoparticles with metal nanocrystals, and studies show that the incorporation of silver (Ag) nanoparticles can significantly improve charge-carrier mobility. ,, …”

The Preparation and Electrochemical Performance Analysis of Different Porous Silicon Composites

“…The diffraction intensity became more stronger compared with peaks of silicon, indicating that the crystallinity of Si-Ag composites was high. This result also showed the successful attachment of AgNPs to porous silicon [12][13]. Figure 1B showed XRD spectrum of Si-Li 2 CO 3 composite.…”

Constructing a Sheet-Stacked Si/C Composite by Recycling Photovoltaic Si Waste for Li-Ion Batteries

“…Fan et al utilized the lamellar silicon morphology and constructed a core–shell structure to provide ample space for Si in the Z direction to buffer volume expansion and strengthen the conductive contact. Xi et al synthesized PSi@SiO x /nano-Ag composites with artificial nano/micropores in the lamellar and native SiO x layer on the surface to relieve volumetric expansion. Overall, significant progress has been made with the recycling and utilization of Si waste to prepare Si-based anode materials. − However, although recent research studies already focus on the oxidation layer and the primary morphology, related research studies based on inherent materials advantages are still insufficient.…”