"Zero-Strain" NiNb₂O₆ Fibers for All-Climate Lithium Storage.

ABSTRACT: Niobates are promising all-climate Li⁺-storage anode material due to their fast charge transport, large specific capacities, and resistance to electrolyte reaction. However, their moderate unit-cell-volume expansion (generally 5%-10%) during Li⁺ storage causes unsatisfactory long-term cyclability. Here, "zero-strain" NiNb₂O₆ fibers are explored as a new anode material with comprehensively good electrochemical properties. During Li⁺ storage, the expansion of electrochemical inactive NiO₆ octahedra almost fully offsets the shrinkage of active NbO₆ octahedra through reversible O movement. Such superior volume-accommodation capability of the NiO₆ layers guarantees the "zero-strain" behavior of NiNb₂

SUBMITTER: Zhao Y 

PROVIDER: S-EPMC11427633 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature