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

Abstract

In order to improve the initial coulomb efficiency (ICE) and cycle performance of SiO, in this study, the disproportionation reaction of commercial SiO is performed with the assistance of Na2CO3...

A Si@SiOC@Li2Si2O5 anode derived from pyrolysis of polysiloxane enables lithium-ion batteries to exhibit high electrochemical performance and high initial coulombic efficiency

“…Among various anode materials for lithium-ion batteries (LIBs), silicon-based materials, due to their high theoretical specific capacity (4200 mA h g −1 ), are regarded as some of the most promising anode materials for LIBs. 1–6 However, large volume changes of Si (over 300%) during cycling generally lead to pulverized Si and collapsed anode structures, which considerably limits the practical application of Si. 7,8 In addition, nano Si is easily oxidized when exposed to air to form a silicon suboxide (SiO x ) layer on the surface.…”