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Comprehensive Insight into the Mechanism, Material selection and Performance Evaluation of supercapatteries

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Nano-Micro Letters 2020年第7期12卷 43-88页

作者： saravanakumar Balasubramaniam Ankita Mohanty suresh Kannan Balasingam sang Jae Kim Ananthakumar ramadoss school for Advanced Research in Polymers Laboratory for Advanced Research in Polymeric MaterialsCentral Institute of Plastics Engineering and TechnologyBhubaneswar 751024India Department of Materials science and Engineering Faculty of Natural SciencesNorwegian University of Science and Technology(NTNU)Trondheim 7491Norway Nanomaterials and systems Laboratory Major of Mechatronics EngineeringFaculty of Applied Energy SystemJeju National UniversityJeju 63243Republic of Korea

Electrochemical energy storage devices(EEss)play a crucial role for the construction of sustainable energy storage system from the point of generation to the end user due to the intermittent nature of renewable ***,to meet the demand for next-generation electronic applications,optimizing the energy and power densities of EEss with long cycle life is the crucial *** e orts have been devoted towards the search for new materials,to augment the overall performance of the *** there are a lot of ongoing researches in this field,the performance does not meet up to the level of commercialization.A further understanding of the charge storage mechanism and development of new electrode materials are highly *** present review explains the overview of recent progress in supercapattery devices with reference to their various *** di erent charge storage mechanisms and the multiple factors involved in the performance of the supercapattery are described in ***,recent advancements in this supercapattery research and its electrochemical performances are ***,the challenges and possible future developments in this field are summarized.

关键词： supercapattery Energy density Power density Redox materials Carbon materials

Wire-shaped 3D-Hybrid supercapacitors as substitutes for Batteries

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Nano-Micro Letters 2020年第2期12卷 211-223页

作者： Kyeong‑Nam Kang Ananthakumar ramadoss Jin‑Wook Min Jong‑Chul Yoon Deokjung Lee seok Ju Kang Ji‑Hyun Jang school of Energy and Chemical Engineering Low Dimensional Carbon Materials CenterUlsan National Institute of Science and TechnologyUlsan 44919Republic of Korea Laboratory for Advanced Research in Polymeric Materials Central Institute of Plastic Engineering and TechnologyBhubaneswar 751024India school of Mechanical Aerospace and Nuclear EngineeringUlsan National Institute of Science and TechnologyUlsan 44919Republic of Korea

We report a wire-shaped three-dimensional(3D)-hybrid supercapacitor with high volumetric capacitance and high energy density due to an interconnected 3D-configuration of the electrode allowing for large number of electrochemical active sites,easy access of electrolyte ions,and facile charge transport for flexible wearable *** interconnected and compact electrode delivers a high volumetric capacitance(gravimetric capacitance)of 73 F cm−3(2446 F g−1),excellent rate capability,and cycle *** 3D-nickel cobalt-layered double hydroxide onto 3D-nickel wire(NiCo LDH/3D-Ni)//the 3D-manganese oxide onto 3D-nickel wire(Mn3O4/3D-Ni)hybrid supercapacitor exhibits energy density of 153.3 Wh kg−1 and power density of 8810 W kg−*** red lightemitting diode powered by the as-prepared hybrid supercapacitor can operate for 80 min after being charged for tens of seconds and exhibit excellent electrochemical stability under various deformation *** results verify that such wire-shaped 3D-hybrid supercapacitors are promising alternatives for batteries with long charge–discharge times,for smart wearable and implantable devices.

关键词： Three-dimensional(3D)metal current collector Flexible hybrid supercapacitor Wire-shaped supercapacitor High energy density device Fast charging energy storage system

BLOCKCHAIN TECHNOLOGIEs AND APPLICATIONs

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China Communications 2019年第6期16卷 I0004-I0006页

作者： Erwu Liu Alex“sandy”Pentland Greg Adamson Ramesh ramadoss Yixian Yang Wei-Tek Tsai Yunlei Zhao Min Lei Tongji University Tongji-ARM AI Innovation Labs the local group development of the IEEE Blockchain Initiative in China the IEEE shanghai Blockchain Group the U.s.National Academy of Engineering the World Economic Forum Cyber security at the University of Melbourne school of Engineering standards Australia blockchain standards technical committee IEEE Blockchain Initiative the IEEE Blockchain standards Committee the IEEE P2418.1 Blockchain standards Working Group Information security Center Beijing University of Posts and Telecommunications Beihang University school of Computer science Fudan University the school of Cyberspace security Beijing University of Posts and Telecommunications

Blockchain is a technology that uses community validation to synchronize the content of ledgers replicated by multiple *** Blockchain derives its origins from technologies introduced decades ago,recently it has received an astonishing amount of attention in both academic and industry due to its charac-teristics of decentralization,point-to-point transmission,transparency,traceability,non-tampering,and data *** researchers and practitioners have recognized that Blockchain can be used to solve complex technical or socio-economic problems.

关键词： Blockchain ledgers replicated multiple users