"Catalyst point, positive electrode active material containing same, and lithium-sulfur secondary battery"

Inventor : D. W. Lee, J. Lee, W.-G. Lim, K. N. Sohn, D. K. Yang and C. Jo,
Korean patent field: 10-2017-0069524 (May. 6, 2017) patent number: 10-2183658 (Nov. 26, 2020), US20200295354A1, 2020