Sulfur/carbon composites prepared with ordered porous carbon for Li-S battery cathode

• 来源期刊: 能源化学
• 年，卷（期）: 2014,（3）
• 所属期刊栏目: Articles
• 页码范围: 391-396
• 页数: 6页
• 语种: 英文
• DOI: 10.1016/S2095-4956(14)60162-5

摘要

Ordered porous cabon with a 2-D hexagonal structure, high specific surface area and large pore volume was synthesized through a two-step heating method using tri-block copolymer as template and phenolic resin as carbon precursor. The results indicated the electrochemical performance of the sulfur/carbon composites prepared with the ordered porous carbon was significantly affected by the pore structure of the carbon. Both the specific capacity and cycling stability of the sulfur/carbon composites were improved using the bimodal micro/meso-porous carbon frameworks with high surface area. Its initial discharge capacity can be as high as 1200 mAh·g-1 at a current density of 167.5 mA·g-1. The improved capacity retention was obtained during the cell cycling as well.