Abstract
Supercapacitors have attracted significant attention as energy storage devices owing to their high power density, high charging rate, and long cycle life. However, they possess low energy density, which limits their practical applications. To address this issue, various high-capacitance materials, such as transition metal oxides and conducting polymers, have been investigated. Recent pioneering studies have described the emergent pseudocapacitance in two-dimensional (2D) nanomaterials, which are of significant interest because of their unique structure, remarkable physical properties, and tunable surface chemistry. Through this brief review, we present our contributions to this new class of pseudocapacitive 2D nanomaterials: oxidized black phosphorous, transition metal dichalcogenides, and MXene. The surface-capacitive charge storage mechanism of 2D nanomaterials is understood through in situ spectroscopic and computational analyses. Moreover, the corresponding capacitive features and performances are maximized by nanostructuring, nanoarchitecturing, and compositional control.
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Acknowledgements
This work was supported by both the Technology Innovation Program (20004958, Development of ultra-high performance super-capacitor and high power module) funded By the Ministry of Trade, Industry and Energy (MOTIE) and the R&D Convergence Program (CAP-15-02-KBSI) of the National Research Council of Science & Technology, Republic of Korea.
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Ho Seok Park is an associate professor of Chemical Engineering at SKKU as well as an adjunct professor at the Samsung Advanced Institute for Health Science & Technology (SAIHST). He received his Ph.D. from Korea Advanced Institute of Science & Technology (KAIST) in 2008 and worked as a Postdoctoral Researcher in the Department of Biological Engineering at Massachusetts Institute of Technology (MIT) from 2008 to 2010. His current research interests focus on energy and chemical storage materials and devices based on 2D, carbon, and hybrid nanomaterials. He has published more than 160 peer-reviewed papers on top journals, such as Nat. Mater., Joule, Energy & Environmental Science, JACS, ACS Nano, Nano Lett., Adv. Mater., Adv. Energy Mater., Adv. Funct. Mater., and Nano Energy, and being taking editorial board member or associate editor in “Batteries & Supercaps” (Wiley), “Materials”, “Car- bon Letters”, and “Macromolecular Research”. He has been recognized with several awards including “100 Best Researches” (NRF, 2019), “The Scientist of the Month” (NRF, 2019), “Young Professor Award” (LG Chemicals, 2019), “SKKU Fellow” (Sungkyunkwan University, 2019), “SAIHST Arrow Award” (Samsung Advanced Institute of Health Science & Technologies, 2019), “Emerging Young Investigator” (RSC, 2018), “Best paper award” (KSIEC, 2016 & 2017), “Award for Young Researcher” (Miwon, 2017), “Top 3 Korean young researcher” (Jung Ang Ilbo, 2016), etc.
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Park, S.K., Nakhanivej, P. & Park, H.S. Two-dimensional nanomaterials as emerging pseudocapacitive materials. Korean J. Chem. Eng. 36, 1557–1564 (2019). https://doi.org/10.1007/s11814-019-0364-1
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DOI: https://doi.org/10.1007/s11814-019-0364-1