Atomic Structure of TCN Catalyst for Polysulfide Conversion (IMAGE)

Tsinghua University Press

Atomic Structure of TCN Catalyst for Polysulfide Conversion

Caption

This schematic illustrates the atomic-level design of the TixCr1-xN solid-solution catalyst embedded in carbon nanofibers (CNFs@TCN) for lithium-sulfur batteries. The Ti and Cr atoms, coordinated with N, form an optimized electronic structure that enables rapid catalytic conversion of lithium polysulfides (Li2S8, Li2S6, Li2S4, Li2S2 and Li2S). The unique d-band electronic configuration of the bimetallic nitride enhances both chemical adsorption and electrocatalytic activity, effectively suppressing the polysulfide shuttle effect while promoting efficient solid-liquid-solid reaction kinetics throughout the charge-discharge process.

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Nano Research, Tsinghua University Press

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