Electrospun Carbon Nanofibers with Numerous Miniature Carbon Nanofibers for Free-Standing, Binder/Conductive Additive-Free Lithium-Ion Battery Anodes

Abstract

Among their several unique properties, the high electrical conductivity and mechanical strength of carbon nanofibers make them suitable for applications such as catalyst support for fuel cells, flexible electrode materials for secondary batteries, and sensors. However, their performance requires improvement for practical applications. Several methods have been pursued to achieve this, such as growing carbon nanotubes from carbon nanofibers; however, the transition metal catalyst used to grow carbon nanotubes causes problems, including side reactions. This study attempts to address this issue by growing numerous branched carbon nanofibers from the main carbon nanofibers using alkali metals. Excellent electrical conductivity is achieved by growing densely branched carbon nanofibers. Consequently, a current collector, binder, and conductive material-free anode material is realized, exhibiting excellent electrochemical performance compared with existing carbon nanofibers. The proposed method is expected to be a powerful tool for secondary batteries and have broad applicability to various fields.

Keywords

alkali metal / carbon nanofiber / free-standing / lithium-ion battery / superior conductivity

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2025 The Author(s). Energy & Environmental Materials published by John Wiley & Sons Australia, Ltd on behalf of Zhengzhou University.