articleAdvanced Energy MaterialsMar 25, 2019Closed access

Capture and Catalytic Conversion of Polysulfides by In Situ Built TiO 2 ‐MXene Heterostructures for Lithium–Sulfur Batteries

Tianjin University · Collaborative Innovation Center of Chemical Science and Engineering Tianjin · +6 more institutions

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Abstract

Abstract The detrimental shuttle effect in lithium–sulfur batteries mainly results from the mobility of soluble polysulfide intermediates and their sluggish conversion kinetics. Herein, presented is a multifunctional catalyst with the merits of strong polysulfides adsorption ability, superior polysulfides conversion activity, high specific surface area, and electron conductivity by in situ crafting of the TiO 2 ‐MXene (Ti 3 C 2 T x ) heterostructures. The uniformly distributed TiO 2 on MXene sheets act as capturing centers to immobilize polysulfides, the hetero‐interface ensures rapid diffusion of anchored polysulfides from TiO 2 to MXene, and the oxygen‐terminated MXene surface is endowed with high catalytic…

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