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您的检索式：作者名="Joseph Halim"
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| 1 | MXene-based symmetric supercapacitors with high voltage and high energy density显示文摘MXene-based aqueous symmetric supercapacitors(SSCs)are attractive due to their good rate performances and green nature.However,it remains a challenge to reach voltages much over 1.2 V,which significantly diminishes their energy density.Herein,we report on Mo_(1.33)CTz MXene-based SSCs possessing high voltages in a 19.5 M LiCl electrolyte.Benefiting from the vacancy-rich structure and high stable potential window of Mo_(1.33)CTz,the obtained SSCs deliver a maximum energy density of>38.2 mWh cm^(-3) at a power density of 196.6 mW cm^(-3) under an operating voltage of 1.4 V,along with excellent rate performance and impressive cycling stability.This highly concentrated LiCl electrolyte is also applicable to Ti_(3)C_(2)Tz,the most widely studied MXene,achieving a maximum energy density of>41.3 mWh cm^(-3) at a power density of 165.2 mW cm^(-3) with an operating voltage of 1.8 V.The drop in energy density with increasing power in the Ti_(3)C_(2)Tz cells was steeper than for the Mo-based cells.This work provides a roadmap to develop superior SSCs with high voltages and high energy densities. | Wei Zheng Joseph Halim Per O.Å.Persson Johanna Rosen Michel W.Barsoum | 2022 | Materials Reports(Energy)2022，2，1： | 0 |
| 2 | Colorless-to-colorful switching of electrochromic MXene by reversible ion insertion显示文摘Electrochromic(EC)materials that change color with voltage have been widely studied for use in dynamic windows.However,colorless-to-colorful switching with high contrast ratio is generically unattainable,especially for colorless-to-black electrochromic materials with an ultrahigh contrast ratio over the entire visible region.In this work,we developed Nb_(1.33)C MXene-based dynamic windows with colorless-to-black switching of up to 75%reversible change in transmittance from 300 to 1,500 nm.By exploring the electrochromic effects of different electrolytes through in situ optical changes and electrochemical quartz crystal microbalance(EQCM),it is found that electrochromic behavior is greatly influenced by the extent of reversible Li^(+)insertion/deinsertion between the two-dimensional Nb_(1.33)C MXene nanosheets.In addition,a colorless-to-black EC device based on Nb_(1.33)C with an overall integrated contrast ratio over 80%was successfully constructed by a solution-processable spin coating method.This work enables a simple route to fabricate MXene-based high-performance electrochromic smart windows,which is important for further expanding the application of MXenes to optoelectronic and photonic applications. | Jianxia Jiang Leiqiang Qin Joseph Halim Per O.Å.Persson Lintao Hou Johanna Rosen | 2022 | Nano Research2022，15，4： | 0 |
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