Systematic Modification of MoO3‐Based Cathode by the Intercalation Engineering for High‐Performance Aqueous Zinc‐Ion Batteries

• DOI: 10.1002/adfm.202210010
• Publication Date: 2022-12-14T11:58:48Z
• Authors: Zhitang Fang; Cong Liu; Xiaoge Li; Luming Peng; Weiping Ding; Xuefeng Guo; Wenhua Hou
• Keywords: Electrochemical kinetics

Abstract Aqueous Zn‐ion batteries are attracting extensive attention, but their large‐scale application is prevented by the poor electrochemical kinetics and terrible lifespan. Herein, a strategy of introducing conductive poly(3,4‐ethylenedioxythiophene) (PEDOT) into interlayers α‐MoO 3 reported to systematically overcome above shortcomings. Through data analyses cyclic coltammetry, impedance spectroscopy, galvanostatic intermittent titration technique, PEDOT‐intercalated MoO (PEDOT‐MoO ) proved be significantly improved. The first‐principles calculations microscopically disclose that changed energy band lowered binding between Zn 2+ host O 2− boost PEDOT‐MoO . Meanwhile, its decreased hydrophilicity suppressed dissolution molybdenum stabilizes repeated cycling processes. Interestingly, it found excellent cathode electrode can restrain growth zinc dendrite on anode, prolonging lifespan aqueous batteries. As result, exhibits enhanced specific capacity (341.5 vs 146.7 mAh g −1 at 0.1 A ), high rate (178.2 19.4 30 prolonged stability (77.6% retention over 500 cycles 2.3% 100 compared with pristine Moreover, as quasi‐solid‐state ZIBs also delivers an impressive performance.