Self-limiting electrode with double-carbon layers as walls for efficient sodium storage performance

Yinghui Wang; Deyang Zhang; Yangbo Wang; Yingge Zhang; Xianming Liu; Weiwei Zhou; Jang-Kyo Kim; Yongsong Luo

doi:10.1039/c9nr02449b

Self-limiting electrode with double-carbon layers as walls for efficient sodium storage performance

Nanoscale. 2019 Jun 6;11(22):11025-11032. doi: 10.1039/c9nr02449b.

Authors

Yinghui Wang¹, Deyang Zhang, Yangbo Wang, Yingge Zhang, Xianming Liu, Weiwei Zhou, Jang-Kyo Kim, Yongsong Luo

Affiliation

¹ Key Laboratory of Microelectronics and Energy of Henan Province, School of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, P. R. China. ysluo@xynu.edu.cn.

PMID: 31140522
DOI: 10.1039/c9nr02449b

Abstract

As a promising energy storage device, sodium ion batteries (SIBs) have attracted more and more attention. Nevertheless, the radius of a sodium ion is much larger than that of a lithium ion, and it is still a significant challenge to solve the problem of volume expansion. In order to solve the problem of volume expansion, a rational nanostructure consisting of CNTs as a carbon matrix, and were sequentially coated with mesoporous SnO2 and N-doped porous carbon tube (NCT). Mesoporous SnO2 can alleviate the volume expansion caused by charge and discharge, and the N-doped porous carbon layer can further inhibit the volume expansion of SnO2. When used as an anode material in sodium ion batteries, the CNT@SnO2@NCT heterostructure achieves efficient capabilities (350 and 150 mA h g-1 at current densities of 0.1 and 2 A g-1, respectively).