Recent progress on performance modulation and mechanism study of silicon-based anodes

Abstract

Silicon-based anode composites are being pursued extensively as anode materials because of their high specific capacities, reduced voltage platforms, and abundant natural resources. However, this type of anodes suffers from...

Preparation of a N-doped Si/Cu/C anode for high-performance lithium-ion batteries

“…30 In recent years, many researchers have adopted the attempt of combining Si with metal to reduce the volume change and improve the electrical conductivity. 31 For example, various structures of Si/Cu nanocomposites have been reported. Zhou et al 32 successfully prepared Cu 3 Si@Si core-shell nanoparticles using the solid phase reaction.…”

Review on Improving the Performance of SiOx Anodes for a Lithium-Ion Battery through Insertion of Heteroatoms: State of the Art and Outlook

“…15 It has been shown that a higher oxygen content of SiO x corresponds to a lower capacity and better cyclability. 19 The initial theorical capacity of the SiO x anode is 2615 mAh/g, and its volume expansion during lithiation/delithiation is ∼160% 18 (typically between 100 and 300% 11 ). One major limitation of the formation of Li silicates and oxides during the first cycle is the low initial coulombic efficiency (ICE), which must be addressed when relying on SiO x -based anodes.…”

“…The theoretical capacity of the Si anode is approximately 4200 mAh/g, which is more than 10 times that of the graphite anode. However, because Si undergoes an alloying process, its volume expansion rate (up to 400% 11 ) is considerably higher than that of graphite, resulting in limited cyclability. In addition, Li ions are continuously consumed during the lithiation/delithiation process because of the repeated formation of the solid electrolyte interface (SEI) layer, which leads to low coulombic efficiency.…”

Effective disproportionation of SiO induced by Na2CO3 and improved cycling stability via PDA-based carbon coating as anode materials for Li-ion batteries

“…With the rapid development of portable electronic products, electric vehicles, and energy storage systems, anode materials with high specific capacities, such as Si, SiO, and lithium metal, attract more attention in Li-ion batteries (LIBs). [1][2][3] Due to their higher specific capacity (>1600 mA h g −1 ) than graphite (372 mA h g −1 ) and a smaller volume change (200%) than Si, SiO-based anode materials are regarded as promising highcapacity candidates. However, some intrinsic problems seriously limit their widespread utility for LIBs.…”