Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 20, 2015
Previous Article Next Article

Tunable Sn structures in porosity-controlled carbon nanofibers for all-solid-state lithium-ion battery anodes

Author affiliations

Abstract

Volumetric expansion of active materials during lithium (Li) insertion is a critical drawback of Li-alloy anodes and a major bottleneck for their wide adoption in rechargeable batteries. Here, we report on a novel fabrication method of a tin (Sn) fully embedded one-dimensional (1D) carbon (C) matrix which results in minimal volumetric expansion. The 1D C matrix contributes to the buffer role and electron conduction path. This optimized Sn/C structure is enabled by confining the Sn nucleation site and minimizing the outward Sn diffusion originating from stress relaxation. The difference of thermal expansion coefficient between Sn and C derives the stress. The porosity of C nanofibers is a key parameter to modulate the Sn size and dispersion. It is controlled by stabilization and gas–solid reactions between CO (g), CO2 (g), and C nanofibers. The calcination under an Ar environment, which induced the lowest surface area and total pore volume (10.46 m2 g−1 and 0.0217 cm3 g−1), creates an ideal structure of 15 nm sized uniform Sn nanoparticle embedded C nanofibers. It displays a superior anode performance in all-solid-state Li-ion batteries with a capacity of 762 mA h g−1 and coulombic efficiency greater than 99.5% over 50 cycles. Our scheme provides a fundamental impact on anode materials of Li-ion batteries.

Graphical abstract: Tunable Sn structures in porosity-controlled carbon nanofibers for all-solid-state lithium-ion battery anodes

Back to tab navigation

Supplementary files

Article information


Submitted
03 Feb 2015
Accepted
13 Apr 2015
First published
17 Apr 2015

J. Mater. Chem. A, 2015,3, 11021-11030
Article type
Paper

Tunable Sn structures in porosity-controlled carbon nanofibers for all-solid-state lithium-ion battery anodes

D. Nam, J. W. Kim, J. Lee, S. Lee, H. Shin, S. Lee and Y. Joo, J. Mater. Chem. A, 2015, 3, 11021
DOI: 10.1039/C5TA00884K

Social activity

Search articles by author

Spotlight

Advertisements