Woottapanit, P; Yang, C; Geng, S; Lolupiman, K; Limphirat, W; Zhang, X; He, G; Woottapanit, P; Yang, C; Geng, S; Lolupiman, K; Limphirat, W; Zhang, X; He, G; Qin, J; - view fewer (2025) Electron Donation Effect of α-Boron Nanosheet Enables Highly Stable Zinc Metal Anode. Advanced Functional Materials 10.1002/adfm.202507725. (In press).

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Abstract

Efficiently inhibiting dendrite growth and water-induced side reactions on Zn metal anode still remains a great challenge for the practical application of aqueous Zn ion batteries (AZIBs). Herein, an α-boron nanosheet-coated Zn foil (α-B@Zn) is presented, aiming at enhancing the performance and stability of Zn metal anodes. The α-B nanosheets are successfully synthesized via ultrasonic treatment, exhibiting a unique 2D morphology. Thanks to their hydrophobic and insulating properties, the α-B coating significantly mitigates the hydrogen evolution reaction (HER) and surface corrosion. Furthermore, theoretical calculations and experimental results reveal that the α-B layer facilitates the electron donation effect and endows strong chemical affinity to Zn atoms and Zn(002) plane, resulting in fast Zn desolvation kinetics and uniform Zn deposition. Consequently, the α-B@Zn electrodes maintain satisfactory cycling performance over 2200 h with a high Coulombic efficiency of 99.7%. The assembled α-B@Zn full cell also enables stable discharge capacity up to 4000 cycles with a capacity retention of 95.5%. The findings underscore the efficacy of the α-B protective layer in achieving high-performance zinc anodes for next-generation energy storage systems.

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