公开(公告)号：US20140255786A1

公开(公告)日：2014-09-11

申请号：US14084196

申请日：2013-11-19

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Si Hyoung OH ,  Won Il CHO ,  Seung Ho YU ,  Eon Sung SHIN ,  Min Seop KIM

IPC: H01M4/36

CPC classification number: H01M4/364 ,  C01B32/18 ,  H01M4/0416 ,  H01M4/136 ,  H01M4/366 ,  H01M4/38 ,  H01M4/5815 ,  H01M4/625 ,  H01M10/052

Abstract: A preparation method of a hollow carbon sphere includes preparing a hollow carbon sphere including fine pores by using mold particles and a material including metal-phthalocyanine. The prepared hollow carbon sphere has a carbon shell surface including fine pores, and the hollow carbon sphere may be impregnated with sulfur to prepare a carbon shell-sulfur composite and may be utilized as an anode material of a lithium-sulfur secondary battery. The carbon-sulfur composite material may improve extremely low electrical conductivity of sulfur, confine sulfur and lithium polysulfide originated from sulfur in the carbon shell in which fine pores are distributed to prevent lithium polysulfide having an extended chain structure from being dissolved in an electrolyte, minimize a shuttle reaction, reduce an overcharge amount between charging and discharging, and improve performance of a secondary battery. In addition, a method for mass-producing hollow carbon sphere and carbon shell-sulfur composite material is provided.

Abstract translation: 中空碳球的制备方法包括通过使用模具颗粒和包括金属 - 酞菁的材料制备包括细孔的中空碳球。 制备的中空碳球具有包括细孔的碳壳表面，并且中空碳球可以用硫浸渍以制备碳壳 - 硫复合物，并且可以用作锂 - 硫二次电池的负极材料。 碳 - 硫复合材料可以提高硫的极低导电性，限制硫和硫化锂在其中分布有细孔的碳壳中的硫以防止具有延长链结构的多硫化物溶解在电解质中，使 穿梭反应，减少充电和放电之间的过充电量，并提高二次电池的性能。 此外，提供了用于大规模生产中空碳球和碳壳 - 硫复合材料的方法。