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High-performance polymer electrolyte membranes incorporated with 2D silica nanosheets in high-temperature proton exchange membrane fuel cells

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Journal of energy Chemistry 2022年第1期31卷 323-334,I0009页

作者： Zunmin Guo Jianuo Chen Jae Jong Byun Rongsheng Cai maria pe.e.-page.madhumita sahoo Zhaoqi Ji Sarah J.Haigh Stuart M.Holmes Department of Chemical engineering and Analytical Science The University of ManchesterM139PLUnited Kingdom Department of Materials The University of ManchesterM139PLUnited Kingdom

Silica nanosheets(SN)derived from natural vermiculite(Verm)were successfully incorporated into polyethersulfone-polyvinylpyrrolidone(peS-PVP)polymer to fabricate high-temperature proton exchange membranes(HT-peMs).The content of SN filler was varied(0.1-0.75 wt%)to study its influence on proton conductivity,power density and *** from the hydroxyl groups of SN that enable the formation of additional proton-transferring pathways,the inorganic-organic membrane displayed enhanced proton conductivity of 48.2 mS/cm and power density of 495 mW/cm^(2) at 150℃ without humidification when the content of SN is 0.25 wt%.Furthermore,exfoliated SN(e-SN)and sulfonated SN(S-SN),which were fabricated by a liquid-phase exfoliation method and silane condensation,respectively,were embedded in peS-PVP polymer matrix by a simple blending *** to the significant contribution from sulfonic groups in S-SN,the membrane with 0.25 wt%S-SN reached the highest proton conductivity of51.5 mS/cm and peak power density of 546 mW/cm^(2) at150℃,48%higher than the pristine peS-PVP *** to unaltered peS-PVP membrane,SN added hybrid composite membrane demonstrated excellent durability for the fuel cell at 150℃.Using a facile method to prepare 2D SN from natural clay minerals,the strategy of exfoliation and functionalization of SN can be potentially used in the production of HT-peMs.

关键词： Silica nanosheets Vermiculite High-temperature proton exchange membrane Proton conductivity

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FSe2R:An Improved Collision-Avoidance-based energy efficient Route Selection Protocolin USN

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Computer Systems Science & engineering 2023年第3期44卷 2225-2242页

作者： Prasant Ku.Dash Lopamudra Hota madhumita Panda N.Z.Jhanjhi Kshira Sagar sahoo Mehedi Masud Department of Computer Science and engineering Sambalpur UniversityOdisha768019India Department of Computer Science and engineering NITRourkelaOdisha769008India Department of Computer Science G.M UniversitySambalpurOdisha768001India School of Computer Science and engineering SCETaylor’s UniversitySubang Jaya47500Malaysia Department of Computer Science and engineering SRM UniversityAmaravatiAndhra Pradesh522502India Department of Computer Science College of Computers and Information TechnologyTaif UniversityTaif21944Saudi Arabia

The 3D Underwater Sensor Network(USNs)has become the most optimistic medium for tracking and monitoring underwater *** and collision are two most critical factors in USNs for both sparse and dense *** to harsh ocean environment,it is a challenge to design a reliable energy efficient with collision free *** in link qualities may cause collision and frequent communication lead to energy loss;that effects the network *** overcome these challenges a novel protocol Forwarder Selection energy efficient Routing(FSe2R)is *** proposal’s key idea is based on computation of node distance from the sink,Residual energy(Re)of each node and Signal to Interference Noise Ratio(SINR).The node distance from sink and Re is computed for reliable forwarder node selection and SINR is used for analysis of *** novel proposal compares with existing protocols like H2AB,DeeP,and e2LR to achieve Quality of Service(QoS)in terms of through-put,packet delivery ratio and energy *** comparative analysis shows that FSe2R gives on an average 30%less energy consumption,24.62%better PDR and 48.31%less end-to-end delay compared to other protocols.

关键词： USN energy efficiency collision avoidance MAC SINR

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