▎ 摘　　要

A facile and controllable material preparation method is developed to fabricate a graphene-chambered interconnected nano-Si@N, P, S-codoped C spheres anode composite for lithium ion batteries. Interconnected carbon shells improve the electronic contact of neighbor spheres, while flexible graphene networks ensure high electrical conductivity for the entire structure and provide extra void spaces for the volume expansion of Si. At 200 mA g(-1), the discharge capacity of the composite is still as high as 1086 mAh g(-1) after 200 cycles. At 1600 mA g(-1), a stable discharge capacity of about 821 mAh g(-1) can be obtained. The enhanced electrochemical performance is ascribed to the composition and special microstructure of the fabricated material, which significantly improve the structural stability and conductivity of the electrodes. (C) 2018 Elsevier B.V. All rights reserved.