Interwoven MXene Nanosheet/Carbon-Nanotube Composites as Li-S Cathode Hosts.

Liang, Xiao; Rangom, Yverick; Kwok, Chun Yuen; Pang, Quan; Nazar, Linda F · Adv Mater · 2017

basic_science · Level V

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Abstract

The complex surface chemistry that dictates the interaction between MXene and polysulfides - the formation of thiosulfate via consumption of -OH surface groups, followed by Lewis acid-base interaction between the exposed Ti atoms and polysulfides - is unravelled. Interweaving carbon nanotubes between the MXene layers creates a porous, conductive network with high polysulfide adsorptivity, enabling sulfur hosts with excellent performance even at high loading (5.5 mg cm<sup>-2</sup> ).