Yang Xifeng, Xu Chuming, Li Shuang, Wu Ya-Pan, Wu Xue-Qian, Yin Ya-Meng, Li Dong-Sheng
College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang 443002, PR China; Hubei Three Gorges Laboratory, Yichang, Hubei 443007, PR China.
College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang 443002, PR China; Hubei Three Gorges Laboratory, Yichang, Hubei 443007, PR China.
J Colloid Interface Sci. 2022 Jul;617:633-640. doi: 10.1016/j.jcis.2022.03.015. Epub 2022 Mar 8.
The design and synthesis of high-performance metal-organic frameworks (MOFs)-based electrodes are important for hybrid supercapacitors (HSC). Herein, enhanced interfacial interaction in Co-BDC/TiCT (denoted as CoTC) hybrid nanosheets is achieved through thermal treatment, giving remarkably improved capacity performance compared with CoTC. The low temperature annealing treatment enables modulation of the bridging bonds content of CoTC and thus regulates the interfacial coupling effect between Co-BDC and TiCT. Moreover, both the detailed XPS and XANES analysis reveal that the strong interfacial interactions between the two components promote a partial electron transfer from TiCT to Co-BDC through the Ti-O-Co interfacial bonds. Consequently, it endows the Co-BDC with enhanced conductivity as well as the higher valence of Ti species in TiCT, hence contributes a remarkable enhanced specific capacity. This work will provide a pathway to design advanced MOF/MXene materials for HSC.
高性能金属有机框架（MOF）基电极的设计与合成对于混合超级电容器（HSC）至关重要。在此，通过热处理实现了Co-BDC/TiCT（记为CoTC）混合纳米片中增强的界面相互作用，与CoTC相比，其容量性能得到显著改善。低温退火处理能够调节CoTC的桥连键含量，从而调节Co-BDC与TiCT之间的界面耦合效应。此外，详细的XPS和XANES分析均表明，两种组分之间强烈的界面相互作用促进了电子通过Ti-O-Co界面键从TiCT向Co-BDC的部分转移。因此，它赋予Co-BDC更高的导电性以及TiCT中Ti物种的更高价态，从而显著提高了比容量。这项工作将为设计用于HSC的先进MOF/MXene材料提供一条途径。
