Synthesis of graphitic ordered mesoporous carbon with cubic symmetry and its application in lithium-sulfur batteries.

Abstract

The lithium-sulfur (Li-S) battery faces a couple of major problems in practical applications, including the low conductivity of sulfur and the dissolution of polysulfides. A cathode constructed using a composite of sulfur and ordered mesoporous carbon (OMC) is a promising solution to both problems, as OMCs can have high conductivity and a complex pore structure to trap polysulfides. In this work, we demonstrate that performance of the Li-S battery can be significantly enhanced by using an OMC with a high degree of graphitization and a pore network with cubic symmetry. This graphitic OMC (GOMC) can be produced in a single step using iron phthalocyanine precursor and a silica template with cubic Ia3d symmetry. The GOMC-sulfur (GOMC/S) composite is 175% higher in electrical conductivity compared to the typical OMC-sulfur (OMC/S) composite. In addition, the three-dimensional pore network in GOMC prevents the migration of dissolved polysulfides. These characteristics of GOMC contribute to the improved rate capability and cyclability of the corresponding Li-S battery.

DOI: 10.1088/0957-4484/27/12/125401

Cite this paper

@article{Kim2016SynthesisOG, title={Synthesis of graphitic ordered mesoporous carbon with cubic symmetry and its application in lithium-sulfur batteries.}, author={Min-Seop Kim and Jinhoo Jeong and Won Il Cho and Woong Kim}, journal={Nanotechnology}, year={2016}, volume={27 12}, pages={125401} }