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High-frequency supercapacitors with phosphorus-doped Ketjen black

Journal of Energy Chemistry 2023年第7期82卷 464-474,I0010页

作者： Qing Jin Mahima Khandelwal Woong Kim Department of Materials Science and Engineering Korea UniversitySeoul 02841Republic of Korea

Compact supercapacitors(SCs)have attracted attention for their great potential to replace bulky aluminum electrolytic capacitors(AECs)in alternating current(ac)line filtering ***,the fabrication of a high-frequency SC is reported using Ketjen black(KB)nanoparticles doped with phosphorus(P)to achieve a high areal capacitance of up to 2.26 mF cm^(-2)along with a high-rate capability,with a phase angle of-80.2°at 120 *** high performance of the phosphorus-doped KB(designated PKB)SC with a 6 M KOH aqueous electrolyte is associated with its increased surface wettability and additional capacitive sites provided by the *** functional theory(DFT)calculations further indicate that the P-doping enhances the interactions between the electrolyte ions and the carbon surface,thus leading to an improved electrochemical *** results suggest that the P-doped carbonbased SC could be highly favored in replacing conventional AECs in various high-frequency electronic devices.

关键词： Phosphorus doping Frequency response Wettability Supercapacitor ac line filtering DFT calculation

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ac line Filter Electrochemical Capacitors:Materials,Morphology,and Configuration

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Energy & Environmental Materials 2022年第4期5卷 1060-1083页

作者： Haichao Tang Yang Tian Zhongshuai Wu Yujia Zeng Yang Wang Yang Hou Zhizhen Ye Jianguo Lu State Key Laboratory of Silicon Materials Key Laboratory for Biomedical Engineering of Ministry of EducationSchool of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of Sciences457 Zhongshan RoadDalian 116023China Dalian National Laboratory for Clean Energy Chinese Academy of Sciences457 Zhongshan RoadDalian 116023China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Wenzhou Key Laboratory of Novel Optoelectronic and Nano Materials Institute of WenzhouZhejiang UniversityWenzhou 325036China

Recently,more and more supercapacitors(SCs)have been developed as ac line filter capacitors,which are generally named ac line filter electrochemical capacitors(FECs).Compared to traditional bulky aluminum electrolytic capacitors(AECs),FECs have higher capacity and lower space occupancy,which makes them a strong ***,different from the common SCs for energy storage,it is necessary to consider the frequency response of the SCs for ac line filtering,where the contradiction between frequency response and specific capacitance is a *** researchers have proposed different solutions from the perspective of materials,morphology,and configuration for this *** on the above background,in this review,we briefly introduce the principle and parameters of ac line filter electrochemical *** systematically summarize the state-of-the-art progresses of FECs and discuss their possible application and development in the *** development of FECs can greatly promote the planarization,integration,and miniaturization of filter capacitors,and provide a new solution for the utilization of green and unstable energy.

关键词： ac line filtering fast response filter electrochemical capacitors specific capacitance supercapacitors

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