Synergistic Stabilization of Zn Metal Anodes by 3D Carbon Frameworks with Multiple Ion Channels Loaded with Zincophilic BaTiO3 Nanoparticles

Aqueous zinc-ion batteries (AZIBs) suffer from rampant Zn dendrites growth, corrosion and sluggish transport kinetics, all of which have a serious impact on their performance and practical applications. Therefore, porous carbon nanofibers (BTO@PCNFs) loaded with BaTiO 3 nanoparticles (BTO NPs) are constructed as a multifunctional interlayer for stabilizing the Zn anodes. Owing to the synergistic effect of BTO NPs and 3D porous carbon framework, this interlayer can achieve uniform electric field distribution, accelerate Zn 2+ migration, and promote ion flux homogenization, thus leading to uniform Zn deposition. Meanwhile, the BTO@PCNFs interlayer demonstrates excellent anti-corrosion effect, which can effectively prevent the side reactions. Benefiting from the synergistic effect of interlayers, the BTO@PCNFs multifunctional interlayers achieve a comprehensive optimization of the Zn anodes. The BTO@PCNFs-Zn electrode exhibits lower nucleation overpotential (33.5 mV) at 0.5 mA cm −2 . The Zn//Zn symmetrical cell with BTO@PCNFs interlayer exhibits ultra-low overpotential (14 mV) and ultra-long cycle life (5250 h at 0.5 mA cm −2 ). Even at high current density (30 mA cm −2 ), the BTO@PCNFs-Zn electrode can be stably cycled for more than 830 h, achieving an ultra-high cumulative capacity of 12 450 mAh cm −2 . The multifunctional interlayers can provide a reference for the design of high-performance Zn anodes.