Conformal carbon layer coating on well-dispersed Si nanoparticles on graphene oxide and the enhanced electrochemical performance

Abstract

Abstract Silicon nanoparticles (SiNPs)–graphene oxide (GO) composites are synthesized using a simple, fast, and mild ball-milling route. Uniform and conformal carbon layer is coated on the surface of SiNPs and the carbon-coated SiNPs are well-dispersed on the GO matrix by forming Si O C linkages. A high reversible capacity of 1265 mA g −1 at 50 mA g −1 after 80 cycles, good rate capability of 238 mAh g −1 at 2.5 A g −1 , and long-term cyclability of 230 mAh g −1 at 1 A g −1 after 800 cycles are resulted. The mild ball-milling can be highly promising and scalable approach for producing high-performance Si anode material.