What are amorphous/crystalline heterostructured nanomaterials (AC-HNMS)?

With the expanding adoption of large-scale energy storage systems and electrical devices, batteries and supercapacitors are encountering growing demands and challenges related to their energy storage capability. Amorphous/crystalline heterostructured nanomaterials (AC-HNMs) have emerged as promising electrode materials to address these needs.

Why do amorphous nanomaterials have a built-in electric field?

The built-in electric field formed at the amorphous/crystalline heterointerface lowers the reaction energy barriers, provides additional active storage sites, and effectively regulates the charge transfer kinetics. [37, 44] Comparison of the properties of crystalline nanomaterials, amorphous nanomaterials, and AC-HNMs.

How does a crystalline/amorphous interface improve charge storage capacity?

The introduced V o improved electronic conductivity, while the amorphous shell promoted rapid Li + diffusion, and the crystalline/amorphous interfaces further enhanced charge storage capacity by providing additional storage sites.

Why do amorphous nanomaterials have a low electrical conductivity?

Compared to crystalline nanomaterials, the relatively lower electrical conductivity of amorphous nanomaterials typically results in an additional energy barrier and corresponding poor kinetics, posing an obstacle to their further advancement.

What is a 2D amorphous/crystalline heterostructure?

The 2D amorphous/crystalline heterostructure integrated flexible ultrathin amorphous sheets that enhanced ion transport, nonflexible crystalline skeletons that provided stable mechanical support and facilitated fast electronic transfer, and a porous framework that served as permeable channels to accelerate ion transport kinetics.

Is a crystalline core amorphous shell heterostructure a potential PIB anode?

In 2020, Lu's team introduced an interfacial engineering approach by inducing surface amorphization in VO 2 nanorods, resulting in the formation of crystalline core/amorphous shell heterostructures (SA-VO 2, Figure 10 A). These structures showed great potential as anodes for PIBs, offering excellent K + storage performances.