Preparation and electrochemical performance of SiCN–CNTs composite anode material for lithium ion batteries

摘要: The composite of silicon carbonitride (SiCN) and carbon nanotubes (CNTs) was synthesized by sintering the mixture polysilylethylenediamine-derived amorphous SiCN multi-walled CNTs at a temperature 1,000 °C for 1 h in argon. as-prepared SiCN–CNTs material, which used as anode active substance lithium ion battery, showed excellent electrochemical performance. Charge–discharge tests provided high initial specific discharge capacity 1176.6 mA g−1 steady 450–400 after 30 charge–discharge cycles 0.2 cm−2. Both abovementioned values are higher than that pure polymer-derived SiCN, CNTs, commercial graphite same condition. It deduced not only improved electronic conductivity offered channels sites immigrating intercalating Li+ but also stabilized structure composite.