Mesocellular Carbon Foam (MCF)/Sulfur Composites for High Performance Lithium Sulfur Batteries

Tuesday, October 13, 2015
West Hall 1 (Phoenix Convention Center)
H. S. Kim (Korea Institute of Science and Technology), T. K. Jeong (Pusan National University), and Y. T. Kim (Pusan National University)
In this study, we introduce a mesoporous carbon  with large pore volume (1.72 cm3/g) and bimodal mesopore structure (4 nm and 30 nm).  Mesocellular carbon foam (MCF) was first synthesized by employing mesocellular silica as a template.  After that, MCF was improved hydrophobicity thorough acid treatment to form stronger bonding between carbon and sodium thiosulfate pentahydrate (sulfur precursor).  MCF/S composite was prepared by solution chemical deposition method (Sol-method).   By Sol-method, sulfur of 73 wt.% was loaded in mesopore channels.  As a result, the composite exhibited enhanced cyclability and retained a stable capacity of 820 mAh/g after 50 cycles.