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engineering and Optimization of Silicon–Iron–Manganese Nanoalloy electrode for Enhanced Lithium-Ion Battery

Nano-Micro Letters 2017年第4期9卷 41-48页

作者： Pankaj K.Alaboina Jong-Soo Cho Sung-Jin Cho Joint School of Nanoscience and Nanoengineering North Carolina Agricultural and Technical State UniversityGreensboroNC 27401USA

The electrochemical performance of a battery is considered to be primarily dependent on the electrode material. However, engineering and optimization of electrodes also play a crucial role, and the same electrode material can be designed to offer significantly improved batteries. In this work, Si–Fe–Mn nanomaterial alloy(Si/alloy) and graphite composite electrodes were densified at different calendering conditions of 3, 5, and 8 tons, and its influence on electrode porosity, electrolyte wettability, and long-term cycling was investigated. The active material loading was maintained very high(~2 mg cm^(-2)) to implement electrode engineering close to commercial loading scales. The densification was optimized to balance between the electrode thickness and wettability to enable the best electrochemical properties of the Si/alloy *** this case, engineering and optimizing the Si/alloy composite electrodes to 3 ton calendering(electrode densification from 0.39 to 0.48 g cm^(-3)) showed enhanced cycling stability with a high capacity retention of ~100% over 100 cycles.

关键词： electrode engineering Silicon nanoalloy Calendering effect Electrolyte wettability High-density silicon anode

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Recent Advances in High‑Efficiency Electrocatalytic Water Splitting Systems

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Electrochemical Energy Reviews 2023年第1期6卷 1-38页

作者： Xian‑Wei Lv Wen‑Wen Tian Zhong‑Yong Yuan Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) School of Materials Science and EngineeringNankai UniversityTianjin 300350China

Electrocatalytic water splitting driven by renewable energy input to produce clean hydrogen(H_(2))has been widely considered a prospective approach for a future hydrogen-based ***,the development of industrial alkaline water electrolyzers is hindered due to their unfavorable thermodynamics with high overpotential for delivering the whole process,caused by sluggish kinetics involving four-electron *** exploration of water electrolysis with low energy consumption and high efficiency is urgently required to meet the ever-growing energy storage and portfolio *** review emphasizes the strategies proposed thus far to pursue high-efficiency water electrolysis systems,including from the aspects of electro-catalysts(from monofunctional to bifunctional),electrode engineering(from powdery to self-supported),energy sources(from nonrenewable to renewable),electrolytes(from pure to hybrid),and cell configurations(from integrated to decoupled).Critical appraisals of the pivotal electrochemistry are highlighted to address the challenges in elevating the overall efficiency of water ***,valuable insights for the future development directions and bottlenecks of advanced,sustainable,and high-efficiency water splitting systems are outlined.

关键词： Electrocatalytic water splitting Hydrogen-based society electrode engineering Cell configurations Challenges and perspectives

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Recent development of studies on the mechanism of resistive memories in several metal oxides

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Science China(Physics,Mechanics & Astronomy) 2013年第12期56卷 2361-2369页

作者： TIAN XueZeng WANG LiFen LI XiaoMin WEI JiaKe YANG ShiZe XU Zhi WANG WenLong BAI XueDong Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of Sciences

Resistive switching random access memories(RRAM)have been considered to be promising for future information technology with applications for non-volatile memory,logic circuits and neuromorphic *** performances of those resistive devices are approaching the realistic levels for *** this paper,we review the progress of valence change type memories,including relevant work reported by our *** electrode engineering and in-situ transmission electron microscopy(TEM)high-resolution observation have been implemented to reveal the influence of migration of oxygen anions/vacancies on the resistive switching *** understanding of resistive memory mechanism is significantly important for device applications.

关键词： resistive switching effect valence change memory electrode engineering in-situ TEM

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Advanced two-dimensional materials toward polysulfides regulation of metal-sulfur batteries

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SmartMat 2023年第5期4卷 57-86页

作者： Haining Fan Wenbin Luo Shixue Dou Zijian Zheng School of Fashion and Textiles The Hong Kong Polytechnic UniversityHong KongChina Section of Environmental Protection Key Laboratory of Eco-Industry Institute for Energy Electrochemistry and Urban Mines MetallurgySchool of MetallurgyNortheastern UniversityShenyangChina Institute of Energy Materials Science(IEMS) University of Shanghai for Science and TechnologyShanghaiChina Department of Applied Biology and Chemical Technology Faculty of ScienceThe Hong Kong Polytechnic UniversityHong KongChina Research Institute for Inteligent Wearable Systems The Hong Kong Polytechnic UniversityHong KongChina Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHong KongChina

Metal-sulfur battery,which provides considerable high energy density at a low cost,is an appealing energy-storage technology for future long-range electric vehicles and large-scale power *** major challenge of metal-sulfur batteries is their long-term cycling stability,which is significantly deteriorated by the generation of various soluble polysulfide intermediates and the shuttling of these intermediates through the ***,the intrinsically sluggish reaction kinetics associated with the poor conductivity of sulfur/sulfides family causes a large polarization in cycle behavior,which further deteriorates the electrode *** solve these problems,the research communities have spent a great amount of effort on designing smart cathodes to delicately tailor the physiochemical interaction between the sulfur hosts and ***,we summarize the key progress in the development of two-dimensional(2D)host materials showing advantageous tunability of their physiochemical properties through coordination control methods such as defect engineering,heteroatom doping,heterostructure,and phase and interface ***,we discuss the mechanisms of polysulfide anchoring and catalyzing upon specific coordination environment in conjunction with possible structure-property relationships and theoretical *** review will provide prospective fundamental guidance for future sulfur host design and beyond.

关键词： 2D materials electrode engineering energy storage metal-sulfur batteries polysulfide regulation

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基于二维α-MoO_(3)的多值存储特性及其双重导电机制研究

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Science China Materials 2023年第12期66卷 4773-4781页

作者：单欣刘平王芳谢杨杨魏俊青马泽夏石瑶孙翰鲁世豪宋志棠闫小兵张楷亮 School of Materials Science and engineering Tianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of Film Electronic&Communication Devices School of Integrated Circuit Science and EngineeringTianjin University of TechnologyTianjin 300384China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China College of Electronic and Information engineering Hebei UniversityBaoding 071000China

二维过渡金属氧化物材料的出现为高密度、低功耗的忆阻器研究提供了机会.其中,α-MoO_(3)作为功能层应用于忆阻器是最有希望的候选材料之一.然而,对α-MoO_(3)基忆阻器的导电机制的研究仍然不足.本工作中,我们制作了cross-point结构的α... 详细信息

二维过渡金属氧化物材料的出现为高密度、低功耗的忆阻器研究提供了机会.其中,α-MoO_(3)作为功能层应用于忆阻器是最有希望的候选材料之一.然而,对α-MoO_(3)基忆阻器的导电机制的研究仍然不足.本工作中,我们制作了cross-point结构的α-MoO_(3)忆阻器,通过电极工程优化了其忆阻性能,并详细研究了其电阻转变机制.通过引入具有Ag/Ti叠层结构的混合电极实现了多值非挥发性存储性能.基于电流-电压曲线拟合和温度依赖特性测试结果,结合高分辨透射电镜微观表征,我们提出了α-MoO_(3)忆阻器的双重导电机制.在电阻转变过程中,阳离子和阴离子的迁移都对电导调制有贡献,两种由Ag和氧空位组成的导电丝同时存在.该器件展现出稳定的忆阻特性,超过103的耐久性、大于104的开关比ROFF/RON、多值存储特性和快速响应(10μs).本工作为二维α-MoO_(3)纳米片在高密度存储中的应用提供了理论基础.

关键词： 2Dα-MoO_(3) multi-level storage dual-conductivity mechanism electrode engineering

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