Accelerated and Guided Zn²⁺ Diffusion via Polarized Interface Engineering Toward High Performance Wearable Zinc-Ion...

Rechargeable aqueous Zn-ion batteries (ZIBs) are considered as a new energy storage device for wearable electronic equipment. Nowadays, dendrite growth and uneven deposition of zinc have been the principal problems to suppress the development of high-performance wearable zinc-ion batteries. Herein, a perovskite material of LaAlO₃ nanoparticle has been applied for interface engineering and zinc anode protection. By adjusting transport channels and accelerating the Zn²⁺ diffusion, the hydrogen evolution reaction potential is improved, and electric field distribution on the Zn electrode surface is regulated to navigate the fast and uniform deposition of Zn²⁺. As a proof of demonstration, the assembled LAO@Zn||MnO₂ batteries can display the highest capacity of up to 140 mAh g^-1 without noticeable decay even after 1000 cycles. Moreover, a motor-driven fan and electronic wristwatch powered by wearable ZIBs can demonstrate the practical feasibility of LAO@Zn||MnO₂ in wearable electronic equipment.