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Activated carbon clothes for wide-voltage high-energy-density aqueous symmetric supercapacitors

Chinese Chemical Letters 2020年第6期31卷 1620-1624页

作者： Kwadwo Asare Owusu Zhaoyang Wang Longbing Qu Zi'ang Liu jaafar abdul-aziz mehrez Qiulong Wei Liang Zhou Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Mechanical Engineering The University of MelbourneParkvilleVIC 3010Australia Department of Materials Science and Engineering University of California Los AngelesCA 90095-1595USA

Commercial carbon clothes have the potential to be utilized as supercapacitor electrodes due to their low cost and high ***,the negligible surface area of the carbon clothes serves as a serious impediment to their ***,we report a facile calcination activation method for carbon cloths to realize remarkable comprehensive electrochemical *** activated carbon cloths deliver a high areal capacitance(1700 mF/cm^2),good rate capability,and stable cycling performance up to 20,000 *** to the stability in the wide potential window,a designed symmetric capacitor can function in a cell voltage of 2.0 V and delivers high volumetric and gravimetric energy densities of 7.62 mWh/cm^3 and 18.2 Wh/kg,*** remarkable electrochemical performance is attributed to rich microporosity with high surface area,superior electrolyte wettability,and stability in wide potential window.

关键词： Activated carbon cloth Microporosity Aqueous symmetric supercapacitors Energy density Voltage window

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Outstanding Humidity Chemiresistors Based on Imine-Linked Covalent Organic Framework Films for Human Respiration Monitoring

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Nano-Micro Letters 2023年第9期15卷 368-383页

作者： Xiyu Chen Lingwei Kong jaafar abdul-aziz mehrez Chao Fan Wenjing Quan Yongwei Zhang Min Zeng Jianhua Yang Nantao Hu Yanjie Su Hao Wei Zhi Yang Key Laboratory of Thin Film and Microfabrication(Ministry of Education) Department of Micro/Nano ElectronicsSchool of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Human metabolite moisture detection is important in health monitoring and non-invasive ***,ultra-sensitive quantitative extraction of respiration information in real-time remains a great ***,chemiresistors based on imine-linked covalent organic framework(COF)films with dual-active sites are fabricated to address this issue,which demonstrates an amplified humidity-sensing signal *** regulation of monomers and functional groups,these COF films can be pre-engineered to achieve high response,wide detection range,fast response,and recovery *** the condition of relative humidity ranging from 13 to 98%,the COFTAPB-DHTA film-based humidity sensor exhibits outstanding humidity sensing perfor-mance with an expanded response value of 390 ***,the response values of the COF film-based sensor are highly linear to the relative humidity in the range below 60%,reflecting a quantitative sensing mechanism at the molecular *** on the dual-site adsorption of the(-C=N-)and(C-N)stretching vibrations,the revers-ible tautomerism induced by hydrogen bonding with water molecules is demonstrated to be the main intrinsic mechanism for this effective humidity *** addition,the synthesized COF films can be further exploited to effectively detect human nasal and oral breathing as well as fabric permeability,which will inspire novel designs for effective humidity-detection devices.

关键词： Covalent organic frameworks Humidity sensors Reversible tautomerism Non-invasive diagnosis Health monitoring

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