Phase‐inversion constructed Mo ₂ C@NC microreactor with optimized pyridinic N p‐band center for high‐performance Li–S batteries

Nitrogen‐doped carbon (NC) is widely employed as a conductive matrix in Li‐S batteries, yet its intrinsic catalytic contribution is often overlooked when combined with metal compounds. Herein, we propose a hierarchical microreactor architecture that integrates conductive and catalytic functions through an intimately coupled Mo 2 C@NC interface. Density functional theory calculations demonstrate that coupling NC with Mo 2 C induces pronounced electron redistribution of N atoms, with pyridinic N exhibiting the strongest charge transfer from Mo 2 C, making the p‐band center closest to the Fermi level, thereby endowing superior LiPSs adsorption activity. Guided by this insight, a phase‐inversion strategy is employed using pyridinic‐N‐rich polyacrylonitrile (PAN) and MoO 3 precursors to construct a cross‐linked MoO 3 @PAN network, which is subsequently transformed into Mo 2 C@NC microreactors after carbonization. In this structure, Mo 2 C nanowires are uniformly confined within pyridinic‐N‐rich carbon shells, forming a zero‐distance conductive–catalytic interface that enables efficient electron transfer from Mo 2 C to NC. This integrated microreactor provides continuous electron pathways, abundant catalytic sites, and unobstructed ion transport, effectively avoiding pore blockage commonly encountered in conventional composite cathodes. Consequently, the Mo 2 C@NC cathode exhibits high cycling stability over 1000 cycles at 2.0 C with a low decay rate of 0.052% per cycle. Even at 4.0 C, it retains 790.6 mAh g −1 for over 400 cycles with only 0.027% fading per cycle.