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Updated: Sep 13, 2025
Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
Published on: June 9, 2023
Ni-Bis(dithiolene) Coordination Enhanced Dual-Functional Covalent Organic Frameworks for both Cathodic Zn2+ Storage
Qianchuan Yu1, Tianyu Shen1, Si-Wen Ke1,2
1State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, Suzhou Key Laboratory of Green Intelligent Manufacturing of New Energy Materials and Devices, Tianchang New Materials and Energy Technology Research Center, Institute of Green Chemistry and Engineering, School of Chemistry and Chemical Engineering, School of Sustainable Energy and Resources, Nanjing University, Nanjing, Jiangsu, 210023, P.R. China.
Abstract:
In response to the increasing demand for sustainable energy storage solutions, aqueous zinc-ion batteries (AZIBs) have garnered significant attention for their high safety, low cost, and environmental friendliness. However, two major challenges to battery stability persist: developing efficient cathode materials and addressing zinc dendrite formation. Here, we report a dual-functional covalent organic framework (COF), named Ni-DAPTO, designed to improve both Zn2+ storage on the cathode and zinc deposition kinetics on the anode. The incorporation of Ni coordination centers achieves an expected low energy gap, enhancing the intrinsic conductivity, while selectively guiding uniform Zn2+ deposition. As a result, the Ni-DAPTO cathode demonstrated superior cycling stability and rate performance, retaining a specific capacity of 127.0 and 119.7 mAh g-1 at 0.5 and 10.0 A g-1, respectively after 10 000 cycles. Besides, when employed as artificial solid electrolyte interphase (SEI), Ni-DAPTO can improve zinc utilization and inhibit dendrite formation. The full AZIBs assembled with Ni-DAPTO cathodes and Ni-DAPTO modified Zn anodes deliver a discharge capacity of 100.9 mAh g-1 after 1000 cycles at a current density of 5.0 A g-1. These findings suggest that multifunctional COFs hold great potential for advancing high-performance and long-lasting aqueous secondary batteries.
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