Journal
JOURNAL OF ENERGY STORAGE
Volume 56, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.est.2022.106105
Keywords
Manganese dioxide; MXene nanosheets; Heterostructure; Electrode materials; Supercapacitors
Categories
Funding
- National Natural Science Foundation of China [22209037]
- Fundamental Research Funds for the Central Universities [B220202042]
- College Students'Enterprise and Entrepreneurship Education Program of NUIST [XJDCZX202110300100, XJDCZX202110300090]
Ask authors/readers for more resources
In this study, 2D/2D heterojunctions were constructed by growing alpha-MnO2 nanolamellas on Ti(3)C(2)Tx MXene nanosheets through an in situ oxidation process. The optimized MnO2/MXene heterojunction exhibited excellent electrochemical performance and retained high capacitance after 5000 cycles.
Although supercapacitors are regarded as the next-generation power resources for various electronic devices, their broad-scale commercialization is largely dependent on the exploration and utilization of advanced electrode materials. Herein, we demonstrate an in situ oxidation approach to the construction of 2D/2D heterojunctions built from alpha-MnO2 nanolamellas grown on Ti(3)C(2)Tx MXene nanosheets through an ambient-temperature redox reaction. Interestingly, the growth density of MnO2 nanolamellas on MXene surface can be well controlled by regulating the reaction times, which endows the heterojunctions with adjustable composition, morphology, and microstructure. By virtue of the unique architectural merits including large accessible surface areas, uniform dispersion of MnO2 nanolamellas, well-contacted 2D/2D interfaces, and high electrical conductivity, the optimized MnO2/MXene heterojunction synthesized at a reaction time of 36 h exhibits boosted electrochemical performance with a high specific capacitance of 334.3 F g(-1) at 0.5 A g(-1), good rate property, and long cycle life with similar to 90.9 % capacitance retained after 5000 cycles, far outperforming those of bare MnO2 and MXene electrodes.
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