S-Doped N-Rich Carbon Nanosheets with Expanded Interlayer Distance as Anode Materials for Sodium-Ion Batteries

Jiqian Yang; Xianlong Zhou; Dihua Wu; Xudong Zhao; Zhen Zhou

doi:10.1002/adma.201604108

S-Doped N-Rich Carbon Nanosheets with Expanded Interlayer Distance as Anode Materials for Sodium-Ion Batteries

Adv Mater. 2017 Feb;29(6). doi: 10.1002/adma.201604108. Epub 2016 Nov 25.

Authors

Jiqian Yang¹, Xianlong Zhou¹, Dihua Wu¹, Xudong Zhao¹, Zhen Zhou¹

Affiliation

¹ Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry, Golone-Nankai Joint Laboratory for New Materials Computational Centre for Molecular Science, Institute of New Energy Material Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, 300350, China.

PMID: 27885733
DOI: 10.1002/adma.201604108

Abstract

2D composites with S doping into N-rich carbon nanosheets are fabricated, whose interlayer distance becomes large enough for Na⁺ insertion and diffusion. The large surface area and stable structure also provide more sites for Na⁺ adsorption, leading to high Na-storage capacity and excellent rate performance. Moreover, Faradaic reactions between Na⁺ and tightly bound S is beneficial for further improvement of Na-storage capacity.

Keywords: N-rich carbon; S doping; anodes; nanosheets; sodium-ion batteries.