Summary
The modern technology‐based hybrid energy storage devices (HESDs) in recent times, due to excelling collective features of secondary batteries (SBs) and supercapacitors, have attained the remarkable attention of scientific community throughout the globe. The metal sulfides and their composites among all electrode materials owing to their viable electrochemical characteristics have been recognized as important contender for hybrid devices. In this regard, our work reports the recently utilized single, binary, and ternary composites of metal sulfides as battery grade electrode material for HESDs. Along with synthesis routes including hydrothermal, electrodeposition, solvothermal, microwave, and sonochemical process. Apart from this, different electrochemical characterizations such as cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge discharge (GCD) have been conferred in this review. Furthermore, the electrochemical performance of sulfide‐based HESDs has compared and summarized. The high energy outcomes, current challenges, and future prospects of metal sulfides as electrode material have also been discussed.
Summary
The supercapattery, a hybrid device with both capacitive and battery characteristics, owing to its excellent energy, capacity and power capabilities has broadly been recognized as an eminent energy storage device. With such fascinating features, it still craves for efficient electrode materials to improve energy storage performance. Our study presents the electrochemical analysis of magnetron sputtered pristine tungsten disulfide (WS2) and WS2 anchored over copper (Cu) interfacial layer by employing nickel foam as a current collector. To probe the structural composition, surface morphology and elemental analysis of sputtered materials, X‐ray diffraction, scanning electron microscopy and energy‐dispersive X‐ray spectroscopy are utilized. By employing three‐electrode cell configuration the deposited electrodes are then examined for electrochemical characterizations. The optimal electrode Ni@Cu/WS2 (S2) in this assembly revealed a specific capacity (Qs) of 357 C/g at 3 mV/s and 247.4 C/g at 0.5 A/g. Relying on the electrochemical performance, S2 is further utilized for asymmetric architecture (hybrid device), and hence attained Qs of 185.8 C/g and divulged high energy (Ed) and power (Pd) of 43.9 Wh/kg and 425 W/kg, respectively. Furthermore, for cyclic performance at a high current density js of 8 A/g, the device exhibited efficient stability performance of 98.1% against 4500 consecutive galvanostatic charge discharge (GCD) cycles. Moreover, by applying the semi‐empirical approach, a device is assessed for capacitive and diffusive contribution, with maximum contribution of 36.93% and 93.68% against potential scan rates of 100 and 3 mV/s, respectively. All the intriguing results attained via magnetron sputtered S2 vibrantly increase its worth as an electrode material for practical hybrid device applications.
Content Centric Networking (CCN) is a newly proposed internet architecture based on content abstraction rather than host abstraction. Since people are concerned with content these days rather than typical host to host communication; hence locations from which they get the required content does not matter. The content needs to be secured so content requesting node has to make sure while receiving content from content publisher that whether the publisher and its content is authentic or not. In CCN, the content is taken into consideration rather than the route over which content travels. To validate the authenticity of content on each node, an effective security scheme should be developed. In this paper we propose a location identity based content security scheme for CCN. We evaluated the performance of proposed scheme using ccnSim simulator and its security validation using AVISPA tool.
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