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Two-dimensional multimetallic sulfide nanosheets with multi-active sites to enhance polysulfide redox reactions in liquid Li2S6-based lithium-polysulfide batteries

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Journal of Energy Chemistry 2021年第1期30卷 163-169,I0006页

作者： Chenyang Zha Donghai Wu Yuwei Zhao Jun Deng Jinghua Wu Rong Wu Meng Yang Lin Wang Houyang Chen Key Laboratory of Flexible Electronics(KLOFE) Institute of Advanced Materials(IAM)Nanjing Tech UniversityNanjing 211816JiangsuChina Henan Key Laboratory of Nanocomposites and Applications Institute of Nanostructured Functional MaterialsHuanghe Science and Technology CollegeZhengzhou 450006HenanChina Department of Chemical and Biological Engineering University at BuffaloThe State University of New YorkBuffaloNY 14260-4200USA Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201ZhejiangChina School of Materials and Chemical Technology Tokyo Institute of Technology2-12-1 OokayamaMeguroTokyo 152-8550Japan

The lithium-sulfur battery has attracted enormous attention as being one of the most significant energy storage technologies due to its high energy density and ***,the "shuttle effect" of polysulfide intermediates represents a formidable challenge towards its wide ***,we have designed and synthesized two-dimensional Cu,Zn and Sn-based multimetallic sulfide nanosheets to construct multi-active sites for the immobilization and entrapment of polysulfides with offering better performance in liquid Li2S6-based lithium-polysulfide *** experimental measurements and theoretical computations demonstrate that the interfacial multi-active sites of multimetallic sulfides not only accelerate the multi-chained redox reactions of highly diffusible polysulfides,but also strengthen affinities toward *** adopting multimetallic sulfide nanosheets as the sulfur host,the liquid Li2 S6-based cell exhibits an impressive rate capability with 1200 mAh/g and retains 580 mAh/g at 0.5 mA/cm^(2) after 1000 *** high sulfur mass loading conditions,the cell with 2.0 mg/cm^(2) sulfur loading delivers a cell capacity of 1068 mAh/g and maintains 480 mAh/g with 0.8 mA/cm^(2) and 500 *** study provides new insights into the multifunctional material design with multi-active sites for elevated lithium-polysulfide batteries.

关键词： multimetallic sulfide Nanosheets multi-active sites Lithium-polysulfide battery

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Atomically dispersed indium and cerium sites for selectively electroreduction of CO_(2)to formate

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Nano Research 2023年第7期16卷 8757-8764页

作者： Zhong Liang Lianpeng Song Mingzi Sun Bolong Huang Yaping Du Tianjin Key Lab for Rare Earth Materials and Applications Center for Rare Earth and Inorganic Functional MaterialsHaihe Laboratory of Sustainable Chemical TransformationsSmart Sensing Interdisciplinary Science CenterSchool of Materials Science and EngineeringNational Institute for Advanced MaterialsNankai UniversityTianjin 300350China Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityHong Kong 999077China

Currently,single-atom combo catalysts(SACCs)for carbon dioxide reduction reaction(CO_(2)RR)to the formation of HCOOH are still very limited,especially the lanthanide-based *** this work,the novel SACCs with atomically dispersed In and Ce active sites were successfully prepared on the nitrogen-doped carbon matrix(InCe/CN).Both aberration-corrected high-angle annular dark-field scanning transmission electron microscopy(AC-HAADF-STEM)images and the extended X-ray absorption fine structure(EXAFS)spectra proved the well-isolated In and Ce *** as-prepared InCe/CN shows a high Faradaic efficiency(FE)(77%)and current density of HCOOH formation(j_(HCOOH))at-1.35 V *** hydrogen electrode(RHE),much higher than the single atom *** calculations have indicated that the introduced Ce single atom sites not only significantly promote electron transfer but also optimize the In-5p orbitals towards higher selectivity towards the HCOOH *** work innovatively extends the design of SACCs towards the main group and Ln metals for more applications.

关键词： single-atom combo catalysts carbon dioxide reduction formate generation multi-active sites rare earth

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Integration of partially phosphatized bimetal centers into trifunctional catalyst for high-performance hydrogen production and flexible Zn-air battery

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Science China Materials 2022年第5期65卷 1176-1186页

作者： Miaosen Yang Yifan Liu Jiaqiang Sun Shusheng Zhang Xijun Liu Jun Luo School of Chemical Engineering Northeast Electric Power UniversityJilin 132012China Nanchang Institute of Technology Nanchang 330044China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China State Key Laboratory of Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China College of Chemistry Zhengzhou UniversityZhengzhou 450000China Institute for New Energy Materials&Low-Carbon Technologies and Tianjin Key Lab for Photoelectric Materials&Devices School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials and Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured MaterialsSchool of ResourceEnvironments and MaterialsGuangxi UniversityNanning 530004China

The development of robust and efficient trifunctional catalysts showing excellent oxygen evolution reaction(OER), oxygen reduction reaction(ORR) and hydrogen evolution reaction(HER) kinetics has been ***, we prepared a hybrid iron and cobalt-based metal alloy phosphide on a phosphorus and nitrogen co-doped carbon substrate(Fe Co-P/PNC) as a catalyst using a one-step Pregulation method. The catalyst exhibited a positive half-wave potential of 0.86 V versus the reversible hydrogen electrode(RHE) for ORR, and low overpotentials of 350 and 158 m V for OER and HER, respectively, to achieve a current density of10 m A cm^(-2). Density functional theory calculations demonstrated the dominant role of P in both Fe Co phosphide and carbon matrix, which led to the good ORR, OER and HER kinetics. The assembled aqueous and flexible Zn-air batteries with Fe Co-P/PNC as the air cathode displayed excellent peak power densities of 195.1 and 90.8 m W cm^(-2), respectively, as well as outstanding charging-discharging performance, long lifetime, and high flexibility. Moreover, the self-powered overall water-splitting cell exhibited a low working voltage of1.71 V to achieve a current density of 10 m A cm^(-2), confirming its excellent multifunctional OER/ORR/HER activity.

关键词： trifunctional electrocatalyst multi-active sites alloy/phosphide hydrogen production flexible Zn-air battery

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