Thermal treatment for promoting interfacial interaction in Co-BDC/Ti3C2Tx hybrid nanosheets for hybrid supercapacitors

Xifeng Yang; Chuming Xu; Shuang Li; Ya-Pan Wu; Xue-Qian Wu; Ya-Meng Yin; Dong-Sheng Li

doi:10.1016/j.jcis.2022.03.015

Thermal treatment for promoting interfacial interaction in Co-BDC/Ti₃C₂T_x hybrid nanosheets for hybrid supercapacitors

J Colloid Interface Sci. 2022 Jul:617:633-640. doi: 10.1016/j.jcis.2022.03.015. Epub 2022 Mar 8.

Authors

Xifeng Yang¹, Chuming Xu¹, Shuang Li², Ya-Pan Wu¹, Xue-Qian Wu¹, Ya-Meng Yin¹, Dong-Sheng Li³

Affiliations

¹ 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.
² 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. Electronic address: lishmail@126.com.
³ 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. Electronic address: lidongsheng1@126.com.

PMID: 35305475
DOI: 10.1016/j.jcis.2022.03.015

Abstract

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/Ti₃C₂T_x (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 Ti₃C₂T_x. Moreover, both the detailed XPS and XANES analysis reveal that the strong interfacial interactions between the two components promote a partial electron transfer from Ti₃C₂T_x 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 Ti₃C₂T_x, hence contributes a remarkable enhanced specific capacity. This work will provide a pathway to design advanced MOF/MXene materials for HSC.

Keywords: Hybrid nanosheets; Hybrid supercapacitors; Interfacial interaction; MOF/MXene.