Hyper‐Crosslinking to Customize Ultrathin‐Wall Closed Pores in Pitch‐Derived Carbon for Sodium‐Ion Batteries

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 8, 2025

Abstract Pitch is a highly preferable and cost‐effective precursor of carbon materials. Nevertheless, its direct pyrolysis typically yields graphitized soft carbon, posing challenges to the modulation closed‐pore architecture, due intense intermolecular π–π interactions. This results in negligible plateau capacity sluggish diffusion kinetics sodium‐ion batteries (SIBs). In this study, an innovative hyper‐crosslinking strategy proposed reconstruct pitch molecularly precisely tailor structure derived carbon. The crosslinker intertwined units, transforming linear molecules into 3D porous polymers. Structurally, these cavities tactfully reserved space for forming cores, with single‐layer network skeleton ultrathin pore walls upon carbonization. enabled disruption interactions and, therefore, inhibited structural ordering, facilitating transition from graphitic highly‐disordered abundant closed pores featuring appropriate sizes (2 nm) (1–2 layers). optimal sample delivered high 370 mAh g −1 at 30 mA , as well rate capability that surpassed those most previously reported pitch‐derived carbons. Hyper‐crosslinking has advanced development low‐cost high‐performance materials large‐scale energy storage.

Language: Английский

Bridging Structure and Performance: Decoding Sodium Storage in Hard Carbon Anodes

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: April 9, 2025

Amorphous carbon, particularly hard carbon (HC), is widely considered as the most promising anode material for sodium-ion batteries (SIBs) due to its high reversible capacity and cost-effectiveness. However, complex poorly defined structural properties of HC present challenges in understanding underlying sodium storage mechanisms. To facilitate rational design high-performance anodes, a comprehensive correlation between microstructure behavior critical. This Review critically examines interplay features capabilities, focusing on two key factors: pore structure surface functional groups. It begins by outlining fundamental mechanisms HC, followed an in-depth discussion how chemistry influence storage. Finally, strategic insights are provided manipulate these factors optimize performance. aims drive development next-generation anodes support commercialization SIBs.

Language: Английский