Modified preparation of Si@C@TiO₂ porous microspheres as anodes for high-performance lithium-ion batteries

Abstract

Intact Si@C@TiO2 porous microspheres were synthesized by a modified etching and sol–gel method. The well-designed materials show good cycling performance and rate capability, and can maintain the original mechanical structure after cycling.

One-step chemical vapor deposition synthesis of Si NWs@C core/shell anodes without additional catalysts by the oxide-assisted growth mechanism for lithium-ion batteries

“…After cycling, the R ct value for the pristine silicon electrode, SC-1 electrode and SC-2 electrode is found to be 299.6 Ω, 158.2 Ω and 60.7 Ω, respectively, whereas for the SC-3 electrode, it is determined as 36.3 Ω. The reduced charge transfer impedance and the extremely low R ct value of SC-3 after cycling signifies its significantly enhanced charge transfer kinetics, 44 implying significant advantages of this material in terms of transport kinetics.…”

Preparation and electrochemical properties of PSi@PEDOT/GO as an anode material for Li-ion batteries

“…However, the use of nanostructures cannot solve the problem of poor electrical conductivity of silicon. The large surface area of the silicon nanoparticles promotes the agglomeration of silicon and side reactions of the electrodes, which also leads to rapid battery failure [13,14]. In addition, the preparation of nanostructured Si is complex and costly, making it commercially unfeasible.…”

Controllable Fabrication of Silicon Nanopore Arrays by Two-Step Inductively Coupled Plasma Etching Using Self-Assembled Anodic Aluminum Oxide Mask

“…Micro-nano porous silicon materials have been widely studied and applied owing to their excellent properties compared with those of bulk materials. [1][2][3][4][5][6][7][8][9] For instance, in terms of crystal growth, gallium nitride epitaxy on silicon substrates with porous arrays can significantly reduce its threading dislocation density and enhance its output power. 6 Considering biosensors, porous silicon particles are used in drug-delivery systems based on their biodegradation characteristics.…”

“…1 In the field of energy, porous silicon with microand nanostructures uses its advantages of internal pores and surface modification in high-performance anodes for lithium-ion batteries. 3 In terms of optoelectronic devices, optical performance can be significantly improved by using the excellent anti-reflection characteristics of porous silicon. 4,5 Silicon with a micro-or nanoscopic porous structure, especially nano-scale silicon with a uniform porous array, is not easy to prepare.…”