Superstoichiometric reversible and manipulable copper-ion intercalation in niobium selenide.

ABSTRACT: Few-layer stacked niobium selenide (NbSe₂) has evoked great interest owing to its intrinsically exotic properties and accessible manipulation by controlled ion intercalation for superconductivity physics and advanced device applications. However, attempts to extend the range of reversible intercalation stoichiometries are often hindered by overexpanded bond rupture and intrinsic-limit transition metal redox centres in selenides when proceeding towards deep intercalation. Here, we report that reversible unconventional superstoichiometric controlled intercalation in NbSe₂ with up to two copper-ions per unit cell can be realized by triggering anionic redox, a fivefold improvement over previous report. Synergistic charge transfer of the transition metal and selenium frame

SUBMITTER: Sun Y 

PROVIDER: S-EPMC11873110 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature