A novel strategy for synthesis of Si@N doped carbon anode material with enhanced electrochemical performance for lithium-ion batteries

To relieve the volume expansion of Si, a new strategy for synthesis of Si@N doped Carbon (Si@N-C) anode composite material with the core-shell structure is designed via heat treatment process of silicon@polyaniline (Si@PANI) as the precursor, whose synthesis approach was on the basis of mixed solution of ethanol and water as the solvent. Benefiting from the structural stability of the core-shell structure, the cell assembled with the Si@N-C anode material shows outstanding electrochemical performance, its capacity decreases little with the current density increasing and a high discharge capacity of 1053.42 mAh g(-1) can still be obtained when the current density sets back to 200 mA g(-1). (C) 2019 Elsevier B.V. All rights reserved.