Small, Journal Year: 2025, Volume and Issue: unknown
Published: April 27, 2025
Abstract Layered vanadates are promising cathode materials for aqueous zinc‐ion batteries (AZIBs). Herein, a layered potassium vanadate K 0.5 V 2 O 5 is reported as material AZIBs. It provides high reversible capacity of 471.1 mAh g −1 with unprecedent cycle life at harsh low rate 0.21 C (90.2% retention after 400 cycles, running time 150 days), remarkable capability and decent long‐term cycling stability (no decay 1700 cycles). According to series tests, it revealed that the energy storage mechanism involves initial extraction + followed by subsequent (de)intercalation Zn 2+ /H , in which concomitant structure change chemical state transition vanadium possess reversibility. Moreover, exhibits rapid ion diffusion, favoring its capability. Additionally, also demonstrates excellent low‐temperature adaptability, can operate stably −30 °C. The electrochemical performance, facile preparation, cost promise an attractive candidate practical
Language: Английский