Kg‐Scale Synthesis of Ultrathin Single‐Crystalline MOF/GO/MOF Sandwich Nanosheets with Elevated Electrochemical Performance

作者：Ziyi Li, Yongxin Wang, Xiaofei Wei, Mengjia Han, Boai Li, Fei Zhao, Weidong Fan, Wenmiao Chen, Wenpei Kang, Lili Fan, Ben Xu, Daofeng Sun · 发表于：Advanced Materials · 年份：2025 · DOI：10.1002/adma.202505700 · 被引用次数：23 · 研究领域：Advanced battery technologies research、Advancements in Battery Materials、Supercapacitor Materials and Fabrication

Abstract The scalable preparation of 2D ultrathin metal–organic framework (MOF) nanosheets remains a significant challenge due to low stripping efficiency and susceptibility to agglomeration. Herein, a facile strategy is developed for the synthesis of 2D ultrathin single‐crystal MOF/graphene oxide (GO)/MOF (MGM) sandwich‐like nanosheets based on the Ni/Co‐BDC MOF (BDC = 1,4‐terephthalic acid), with GO serving as a structure‐directing agent. Impressively, 1 kg of MGM nanosheets can be obtained in a single batch with a metal‐based yield of 98.73%. Furthermore, the universality of this strategy is implemented by the successful synthesis of three additional 2D ultrathin nanosheets: MGM 7 ‐ABDC, MGM 7 ‐FBDC, and MGM 7 ‐BPDC (metal = Ni, Co; ligands = 2‐aminoterephthalic acid (2‐ABDC), 2‐fluoroterephthalic acid (2‐FBDC), and 4,4′‐ biphenyl dicarboxylic acid (BPDC)). The as‐prepared MGM 7 nanosheets (Ni: Co ratio = 7:3) exhibit excellent electrochemical performance as the cathode for aqueous basic zinc battery (159.2 mA h g −1 at 1 A g −1 ), anode for sodium‐ion battery (SIB, 593.0 mA h g −1 at 0.2 A g −1 ), and electrocatalyst for the oxygen evolution reaction (OER, 224 mV overpotential at 10 mA cm −2 ), significantly outperforming both bulk MOFs and conventional MOF nanosheets. This work enables the scalable synthesis of 2D MOF nanosheets with enhanced properties for multiple applications.