Mesoporous TiO₂ coating on carbon-sulfur cathode for high capacity Li-sulfur battery.

ABSTRACT: In this paper, a meso-porous TiO₂ (titania) coating is shown to effectively protect a carbon-sulfur composite cathode from polysulfide dissolution. The cathode consisted of a sulfur impregnated carbon support coated with a few microns thick mesoporous titania layer. The carbon-sulfur cathode is made using activated carbon powder (ACP) derived from biomass. The mesoporous titania coated carbon-sulfur cathodes exhibit a retention capacity after 100 cycles at C/3 rate (433 mA g ^-1) and stabilized at a capacity around 980 mA h g^-1. The electrochemical impedance spectroscopy (EIS) of the sulfur cathodes suggests that the charge transfer resistance at the anode, (R _act) is stable for the titania coated sulfur electrode in comparison to a continu

SUBMITTER: Dharmasena R 

PROVIDER: S-EPMC9079043 | biostudies-literature | 2018 Mar

REPOSITORIES: biostudies-literature