Mechanically Robust Self‐Organized Crack‐Free Nanocellular Graphene with Outstanding Electrochemical Properties in Sodium Ion Battery

Abstract

Crack‐free nanocellular graphenes are attractive materials with extraordinary mechanical and electrochemical properties, but their homogeneous synthesis on the centimeter scale is challenging. Here, a strong nanocellular graphene film achieved by the self‐organization of carbon atoms using liquid metal dealloying and employing a defect‐free amorphous precursor is reported. This study demonstrates that a Bi melt strongly catalyzes the self‐structuring of graphene layers at low processing temperatures. The robust nanoarchitectured graphene displays a high‐genus seamless framework and exhibits remarkable tensile strength (34.8 MPa) and high electrical conductivity (1.6 × 104 S m−1). This unique material has excellent potential for flexible and high‐rate sodium‐ion battery applications.

In Situ Construction of (NiCo)3Se4 Nanobeads Embedded in N-Doped Carbon 3D Interconnected Networks for Enhanced Sodium Storage

“…The sodium ion storage behavior and kinetic properties of (NiCo) 3 During the initial cycle, a pronounced cathodic peak was observed at 0.85 V during the initial cathodic scan, attributed to the intercalation of Na ions into the lattice of (NiCo) 3 Se 4 and the formation of the solid-electrolyte interface (SEI) layer. 19 The anodic peak at 1.85 V corresponded to the desodiation process.…”

“…The rapid expansion of electric/hybrid vehicles has greatly spurred the advancement of innovative energy technologies. − However, the limited abundance of lithium presents a constraint on the widespread adoption of lithium-ion batteries on a large scale. In contrast, sodium ion batteries (SIBs) have emerged as a focal point of research due to their abundant sodium reserves and lower cost. − Despite this advantage, the development of SIBs still encounters technical challenges, primarily attributed to the larger size of sodium ions, resulting in sluggish kinetics that adversely affect capacity and cycling performance. , Therefore, developing host materials with stable frameworks and rapid diffusion pathways for Na + represents a critical challenge for the practical implementation of SIBs.…”