Prepared by electrospinning SiO@Co9S8 CF self-supporting anode material has excellent rate and cycling performance

Abstract In this paper, the structural modification of silicon monoxide/carbon composites was carried out, the composition and structure of the prepared composites were characterized in detail, and their electrochemical properties were systematically tested and investigated. The main contents of the study include: Using SiO with a particle size of 30 nm as a silicon source, SiO nanoparticles (SiO NPs) were wrapped in ZIF-67 metal-organic skeletons to prepare hollow-structured SiO@ZIF-67 particles, which were then wrapped in one-dimensional carbon nanofibers (CFs) by simple electrostatic spinning, and then sulfurized and carbonized to obtain free-standing SiO@Co9S8 CF composites. The prepared SiO@Co9S8 CF composite electrodes have high initial charge and discharge reversible capacities, excellent multiplicity performance and ultra-stable cycle life. In addition, the obtained SiO@Co9S8 CF film can be used as a self-supporting electrode, which avoids the traditional cumbersome electrode preparation process.