Electrochemical Performance of NiCo‐MOF‐Derived NiO@NiCo 2 O 4 Nanocomposite Electrode Materials for Supercapacitors

作者：Yi Chen, Cong Liu, Ruixue Sun, Guojie Yin, MR. Manikandan, Yifan Lv, Jingyu Shi, Hao Yu, Rui Liu, Yanchun Hu, Shaoqian Yin, X. W. Wang · 发表于：physica status solidi (RRL) - Rapid Research Letters · 年份：2025 · DOI：10.1002/pssr.202500412 · 被引用次数：1 · 研究领域：Supercapacitor Materials and Fabrication、Advancements in Battery Materials、Aerogels and thermal insulation

In this study, we investigate the effect of varying tannic acid (TA) concentrations on the electrochemicalperformance of NiCo‐MOF‐derived nanocomposite electrode materials. The TA@NiO@NiCo 2 O 4 nanocomposites were synthesized using a straightforward metal–organic framework (MOF) templating strategy, which involved a simple hydrothermal method followed by a two‐step annealing process. Electrochemical characterization reveals that the resulting nanocomposites exhibit excellent cycling stability. Among them, the sample treated with 0.02 mol L −1 TA achieves the highest specific capacitance, reaching 773 F g −1 at a current density of 1 A g −1 . Furthermore, the nanocomposites display reduced electrical impedance, with the 0.02 mol L −1 TA sample recording a series resistance (Rs) as low as 0.60 Ω. After 5000 galvanostatic charge–discharge cycles, the capacity retention of samples treated with TA concentrations of 0, 0.01, and 0.02 mol L −1 all exceed 100%, indicating remarkable electrochemical durability.