Patent ID: 9722245
Date: 2017-08-01
CPC Classifications: C01B,H01M,Y02E,Y02T

Claim:
1. A method of preparing a sulfur-carbon composite material for a cathodic material in a lithium ion battery, the method comprising: (i) impregnating a bimodal porous carbon component with a solution of elemental sulfur, wherein said bimodal porous carbon component contains a first mode of pores which are mesopores, and a second mode of pores which are micropores; and (ii) annealing the sulfur-impregnated bimodal porous carbon component under an inert atmosphere; wherein the resulting sulfur-carbon composite comprises: (i) said bimodal porous carbon component containing therein a first mode of pores which are mesopores, and a second mode of pores which are micropores, and (ii) elemental sulfur contained in at least a portion of said micropores; and wherein at least 60 vol % of the micropores in the resulting sulfur-carbon composite is occupied by elemental sulfur while no more than 5 vol % of the mesopores is occupied by elemental sulfur.