Molecular Engineering Creates Interconnected Accessible Pore Structures in Resin‐Derived Amorphous Carbon for Efficient Sodium Storage

ABSTRACT Amorphous carbon (AC) is a highly promising anode material for sodium‐ion batteries (SIBs). However, its sluggish sodium‐ion diffusion kinetics at low potentials (<0.1 V) severely limit fast‐charging performance. In this study, soft carbon nanocores (SCNs) with controllable oxygen functionalities and aromaticity serve as molecular templates to guide the local orientation and growth of short‐range isotropic carbon microcrystals. This approach constructs an interconnected and accessible pore architecture in resin‐derived AC, featuring extended interlayer spacing and elongated nanosheets, and achieves synergistic molecular‐level optimization of both the topological network and sub‐nanometer pores. Theoretical calculations combined with in/ex situ characterizations demonstrate that this structural design significantly lowers the gap‐limited energy barrier for Na + migration between adjacent carbon layers at low potentials, thereby overcoming the kinetic restriction on plateau‐capacity contribution during high‐rate cycling. As a result, the optimized AC anode delivers a high reversible capacity of 470.7 mAh g −1 at 50 mA g −1 and an outstanding rate performance of 248.9 mAh g −1 at 5 A g −1 , along with excellent cycling stability, retaining 78.1% of its capacity after 1000 cycles. These findings provide fundamental insights for designing activated‐carbon anode materials that simultaneously achieve high capacity and rate performance.