Single-Crystal-to-Single-Crystal Transformation in a Thermally Stable All-Inorganic Polyoxoniobate Framework Boosts Lithium Ion Battery Anode Performance.

ABSTRACT: Niobium oxides are considered as promising anode materials for lithium-ion batteries (LIBs) due to their excellent rate-performance. However, the practical application is hindered by their limited specific capacity. In this work, we report the first example of an all-inorganic two-dimensional (2D) niobate framework as anode material for LIBs. The title compound is based on antimony-linked bivanadyl-capped α-Keggin polyoxoniobates as secondary building units. The compound undergoes a unique single-crystal-to-single-crystal (SCSC) transformation triggered by formic acid which results in the migration of a {VO} unit into the framework interlayer. This results in a 34% increase of the specific capacity, reaching 519 mAh g^-1 at 0.1 A g^-1, thereby surpassing most Nb-based L

SUBMITTER: Sun C 

PROVIDER: S-EPMC12304815 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature