Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 10, Issue 22, Pages 12225-12234Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ta02114e
Keywords
-
Funding
- NSF of China [21805165, 21971143]
- 111 Project [D20015]
- ITOYMR in the Higher Education Institutions of Hubei Province [T201904]
Ask authors/readers for more resources
Interfacial engineering is an attractive strategy for constructing heterogeneous nanostructures and tuning the morphology of metal-organic frameworks (MOFs) and MXenes. This study introduces a temperature-controlled annealing process to fabricate Ni-MOFs/V2CTx-MXene composites and build a hierarchically-porous nanorod structure. The optimized electrode obtained shows excellent specific capacity and cycling stability in hybrid supercapacitors.
Interfacial engineering is an appealing strategy to construct heterogeneous nanostructures and tunes the morphology of metal-organic frameworks (MOFs) and MXenes for hybrid supercapacitors. Herein, a temperature-controlled annealing process is introduced to fabricate Ni-MOFs/V2CTx-MXene (T-x denotes the surface groups, -O, -OH, and -F) composites on Ni foam (NF) (namely MOF/MXene/NF) and subsequently build the heterogeneous structure of a hierarchically-porous nanorod composite without a change in the crystalline structure. Experimental characterizations and theoretical calculations reveal that Ni-O-V bridging bonds are constructed at the Ni-MOF and V2CTx interfaces, which could be used to establish a favorable electronic structure in promoting conductivity and reactivity. The optimized MOF/MXene/NF electrode obtained at 300 degrees C (i.e., MOF/MXene/NF-300) delivers an ultrahigh specific capacity of 1103.9 C g(-1) at 1 A g(-1). The as-assembled hybrid supercapacitor, composed of MOF/MXene/NF-300 as the cathode and activated carbon/NF as the anode, delivers a high energy density of 46.3 W h kg(-1) at a power density of 746.8 W kg(-1) and an outstanding cycling stability of ca. 118.1% capacity retention after 15 000 cycles. Such an achievement stems from the strong chemical bonds at the interface and unique porous morphology. This work suggests a new avenue for designing and preparing robust and high-performance electrode materials for hybrid supercapacitors.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available