Co3O4 Carbon Nanofiber Mats as Negative Electrodes for Sodium-ion Batteries

Document Type

Article

Publication Date

5-1-2016

Publication Title

Materials Letters

Abstract

Co3O4carbon nanofiber (CNF) mats were synthesized by sol-gel electrospinning and carbonization. The tiny Co3O4nanocrystals (6.27 nm) are homogeneously embedded in CNFs predominantly 150 nm in diameter. When applied as negative electrode for sodium-ion batteries (SIBs), Co3O4-CNF mat delivered an excellent cycling stability with reversible specific capacity of 400 mA h g 1 at 0.5 C until 700 cycles. This impressed cycling performance is attributed to the nanoconfinement of the high capacity Co3O4nanocrystals into one-dimensional CNF network. Such a conductive CNF mat could not only used as buffering matrix to effectively release the mechanical strain originated from the Na ion insertion/ex-traction, but also prevent the aggregation of Co3O4nanocrystals.

Volume

170

Issue

1

First Page

21

Last Page

24

DOI

https://doi.org/10.1016/j.matlet.2016.01.132

ISSN

0167-577X

Comments

ESSN: 1873-4979

Rights

© 2016 Elsevier B.V.

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