TiO₂/Porous Carbon Composite-Decorated Separators for Lithium/Sulfur Battery.

ABSTRACT: The practical application of lithium/sulfur (Li/S) batteries is hindered by the migration of soluble polysulfides (Li₂S_n, 4 ≤ n ≤ 8) from cathode to anode, leading to poor electrochemical stability of the cell. To address this issue, in the present study, a TiO₂/porous carbon (TiO₂/PC) composite-coated Celgard 2400 separator was successfully fabricated and used as a polysulfide barrier for the Li/S battery. In TiO₂/PC, the highly conductive PC with three-dimensional ordered porous structure physically constrains polysulfides and at the same time serves as an additional upper current collector. On the other hand, the TiO₂ on the surface of PC chemically adsorbed polysulfides during the charge/discharge process. Due to the phy

SUBMITTER: Han H 

PROVIDER: S-EPMC6538749 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature