ABSTRACT Oxygen electrode reaction kinetics is crucial for achieving high‐energy‐density rechargeable Zn–air batteries. Herein, we couple mechanical energy with electrochemical processes by a piezoelectric BaTiO 3 /ZnIn 2 S 4 heterostructure to synergistically regulate interfacial oxygen reaction kinetics. Strain‐induced polarization in BaTiO 3 converts mechanical stimuli into interfacial potential differences, while ZnIn 2 S 4 provides abundant active sites, enabling Z‐scheme charge separation and amplified interfacial fields. As demonstrated theoretically and experimentally, piezoelectric polarization tuning modulates the electronic structure and adsorption energetics, thus lowering ORR/OER barriers. Benefit from piezoelectric‐field coupling strategy, rechargeable Zn–air batteries achieve a peak power density of 253.3 mW cm −2 (34.4% higher than without mechanical input) and an energy density of 890.8 mWh g −1 . This study establishes a piezoelectric‐field‐coupled paradigm for interfacial kinetic regulation for renewable‐energy‐driven and high‐efficiency energy storage systems.
Yu et al. (Sat,) studied this question.
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