biostudies-literatureFang YNation Natural Science Foundation of ChinaChina Postdoctoral Science Foundatione2205680https://www.ebi.ac.uk/biostudies/studies/S-EPMC9798975biostudies-literatureUnknown9(36)Inducing new phases of transition metal dichalcogenides by controlling the d-electron-count has attracted much interest due to their novel structures and physicochemical properties. 1T'' ReSe₂ is a promising candidate for sodium storage, but the low electronic conductivity and limited active sites hinder its electrochemical capacity. Herein, new-phase 1T' Re_0.75 V_0.25 Se₂ crystals (P2/m) with zig-zag chains are successfully synthesized. The 1T''-1T' phase transition results from the electronic reorganization of 5d orbitals via electron extraction after V-atom doping. The electrical conductivity of 1T' Re_0.75 V_0.25 Se₂ is 2.7 × 10⁵ times higher than that of 1T'' ReSe₂ . Moreover, density functAdvanced science (Weinheim, Baden-Wurttemberg, Germany)Electron-Extraction Engineering Induced 1T''-1T' Phase Transition of Re_0.75 V_0.25 Se₂ for Ultrafast Sodium Ion Storage.PMC979897522025502BX2021329219750512021M69326152103353Fang YLv ZHuang FLv XWang YZheng GfalseElectron-Extraction Engineering Induced 1T''-1T' Phase Transition of Re_0.75 V_0.25 Se₂ for Ultrafast Sodium Ion Storage.Inducing new phases of transition metal dichalcogenides by controlling the d-electron-count has attracted much interest due to their novel structures and physicochemical properties. 1T'' ReSe₂ is a promising candidate for sodium storage, but the low electronic conductivity and limited active sites hinder its electrochemical capacity. Herein, new-phase 1T' Re_0.75 V_0.25 Se₂ crystals (P2/m) with zig-zag chains are successfully synthesized. The 1T''-1T' phase transition results from the electronic reorganization of 5d orbitals via electron extraction after V-atom doping. The electrical conductivity of 1T' Re_0.75 V_0.25 Se₂ is 2.7 × 10⁵ times higher than that of 1T'' ReSe₂ . Moreover, density funct2022-01-01T00:00:00Z2022 Dec2025-04-04T21:05:05.816Z2025-04-04T21:05:05.816ZS-EPMC97989753637252510.1002/advs.202205680