Demystifying Activity Origin of M-N-C Single-Atomic Mediators Toward Expedited Rate-Determining Step in Li-S Electrochemistry.

ABSTRACT: Sluggish sulfur reduction reaction (SRR) kinetics remains a formidable challenge in Li-S electrochemistry. In this sense, the rational design of single-atom species has become a burgeoning practice to expedite sulfur redox, where the underlying catalytic mechanism otherwise remains elusive. Herein, a class of metal single-atom modified porous carbon nanofiber films (MSA PCNFs, M = Fe, Co, or Ni), fabricated via a generic synthetic strategy, as mediators to boost SRR kinetics is reported. Throughout electrokinetic measurement and operando instrumental probing, NiSA PCNF is evidenced to harness the catalytic superiority toward the rate-determining step (i.e., liquid-solid conversion) of the SRR process. Density functional theory (DFT) simulations further reveal that the catalytic features of

SUBMITTER: Jin J 

PROVIDER: S-EPMC11935855 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature