Facile Dissolution-Crystallization Strategy to Achieve Rapid and Uniform Distribution of Sulfur on Porous Carbon for Lithium-Sulfur Batteries

Hui Zhang; Geng Gao; Yin Li; Keyu Zhang; Yaochun Yao; Shaoze Zhang

doi:10.1021/acsomega.2c01217

Facile Dissolution-Crystallization Strategy to Achieve Rapid and Uniform Distribution of Sulfur on Porous Carbon for Lithium-Sulfur Batteries

ACS Omega. 2022 May 31;7(23):19513-19520. doi: 10.1021/acsomega.2c01217. eCollection 2022 Jun 14.

Authors

Hui Zhang^{1

2}, Geng Gao¹, Yin Li¹, Keyu Zhang¹, Yaochun Yao¹, Shaoze Zhang¹

Affiliations

¹ The National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, Kunming 650093, China.
² Material and Architecture College, Guizhou Normal University, Guiyang 550025, China.

Abstract

In this work, we proposed a facile dissolution-crystallization strategy based on density functional theory calculations to achieve rapid as well as uniform distribution of sulfur on porous carbon. Sulfur-containing solution can completely penetrate porous material and in preference remove into the pores under the influence of capillary force, and sulfur tends to crystallize on the defective even non-defective carbon matrix rather than agglomerate. The S/PC composites prepared by this method can still achieve uniform distribution of sulfur when the sulfur content is as high as 85%. All operations can be completed within a few minutes without any heating. Compared with common melt-diffusion and vapor-phase infusion, this approach has lower energy consumption and is simple, safe, continuous, and rapid.