Electrochemical properties of heat-treated polymer-derived SiCN anode for lithium ion batteries

摘要: Abstract Silicon–carbon–nitrogen material (SiCN) is pyrolyzed from polysilylethylenediamine (PSEDA) derivation, followed by a heat-treating process at 1000 °C in Ar atmosphere. This heat-treated SiCN has an excellent electrochemical performance as anode for lithium ion batteries. Charge–discharge cycle measurements show that the exhibits high first discharge capacity of 829.0 mAh g −1 and stays between 400 370 mAh g after 30 cycles. The remains above 300 mAh g current density 80 160 mA g . These values are higher than untreated commercial graphite anodes, which indicates improves charge–discharge capacity, stability high-rate ability anode. It seemed changes structure, formation loose nano-holes on surface graphitic carbon phase contribute to improvement properties