Mass‐Production of Electrospun Carbon Nanofiber Containing SiOx for Lithium‐Ion Batteries with Enhanced Capacity

• Published in: Macromolecular materials and engineering Vol. 304; no. 3
• Main Authors: Moon, Seongjun, Yun, Jisu, Lee, Jae Young, Park, Gyori, Kim, Sung‐Soo, Lee, Kyung Jin
• Format: Journal Article
• Language: English
• Published: Weinheim John Wiley & Sons, Inc 01-03-2019
• Subjects: Anodes; carbon; Carbon fibers; Electrode materials; Electrospinning; Lithium-ion batteries; Morphology; Nanofibers; Polyacrylonitrile; Pyrolysis; silicon; Silicon oxides; syringeless electrospinning
• ISSN: 1438-7492; 1439-2054
• DOI: 10.1002/mame.201800564

In this study, electrospun carbon nanofibers hybridized with silicon oxide (SiOx) are prepared by using a syringeless electrospinning system of polyacrylonitrile (PAN) solution containing tetraethylorthosilicate (TEOS) via a sequential pyrolysis process. The syringeless electrospinning system provides a large number of composite nanofibers in a short time, and the obtained composite nanofibers exhibit uniform diameter and morphology. The composite nanofiber is converted into a carbon nanofiber containing SiOx via a simple pyrolysis. The obtained SiOx‐carbon nanofiber mat exhibits higher charge/discharge capacity than a general carbon nanofiber, and it provides more stable retention than single crystalline silicon materials. Thus, the mass‐production of a SiOx‐carbon nanofiber from syringeless electrospinning is a promising method to produce anodic materials for Li‐ion batteries.
A silicon oxide (SiOx)‐carbon nanofiber for anode material of a lithium‐ion battery is prepared via a syringeless electrospinning system and simple pyrolysis. The anode material with the SiOx‐carbon nanofiber exhibits higher charging/discharging capacity when compared to that of carbon material and better retention capacity when compared with that of silicon materials.