Special Issue On Energy Electrochemical Materials,
2016
College of Chemistry, Nankai University;
Special Issue On Energy Electrochemical Materials, Jun Chen
Journal of Electrochemistry
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Research And Application Of Key Materials For Sodium-Ion Batteries,
2016
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China;
Research And Application Of Key Materials For Sodium-Ion Batteries, Yong-Chang Liu, Cheng-Cheng Chen, Ning Zhang, Liu-Bin Wang, Xing-De Xiang, Jun Chen
Journal of Electrochemistry
Sodium-ion batteries (SIBs) have been considered as a potential large-scale energy storage technology owing to the abundance, wide distribution, and low price of sodium resources. However, the larger and heavier sodium ion as compared to lithium ion makes it difficult to identify appropriate electrode materials with the capability for fast and stable sodium-ion insertion/extraction. Furthermore, the optimization of electrolyte, the matching of cathode and anode materials, and the construction of sodium-ion full batteries with high-performance, high-safety, and low-cost are urgently needed in order to make SIBs commercially available. This review summarizes the up-to-date research progresses in key materials (including cathode, …
Advances And Prospects Of Lithium-Sulfur Batteries,
2016
Department of Chemistry, Fudan University, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, IChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Shanghai 200433 , P.R. China;
Advances And Prospects Of Lithium-Sulfur Batteries, Shou-Yi Yuan, Ying Pang, Li-Na Wang, Yong-Gang Wang, Yong-Yao Xia
Journal of Electrochemistry
Lithium-sulfur batteries have recently attracted worldwide attention due to the high specific theoretical energy density of sulfur cathode (2600 Wh⋅kg-1), low cost and wide availability of sulfur. However, the practical application of lithium-sulfur batteries has been hindered by several challenges, such as the shuttling of polysulfide intermediates, the large volume expansion of sulfur during charge/discharge and the dendrites formation on lithium anode. Foremost among these is the shuttling effect arising from the dissolution of lithium polysulfides intermediate into the electrolyte from the cathode reaction and their diffusion to the anode where they react with metal lithium to form …
Micro/Nano-Structured Electrode Materials For Sodium-Ion Batteries,
2016
Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), College of Metallurgy, Northeastern University, Shenyang 110819, China;Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
Micro/Nano-Structured Electrode Materials For Sodium-Ion Batteries, Shuang Yuan, Yun-Hai Zhu, Sai Wang, Tao Sun, Xin-Bo Zhang, Qiang Wang
Journal of Electrochemistry
Sodium has similar physics and chemical properties to lithium, alternatively, sodium (Na)-ion batteries have again aroused a great deal of interest recently, particularly for large-scale stationary energy storage applications due to the practically infinite sodium resources and low cost. However, the technics and materials for Na-ion batteries are immature. Therefore, development of advanced anode and cathode materials for Na-ion batteries is urgently desired but remains a great challenge. This paper briefly reviews some recent progresses in this field, addressing the morphology effects, as well as functions of carbon composite materials toward Na-ion batteries. Several electrode materials with micro/nano-structures based on …
Construction And Sodium Storage Performance Of Complex One-Dimensional Nanomaterials,
2016
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Hubei Wuhan 430070, China;
Construction And Sodium Storage Performance Of Complex One-Dimensional Nanomaterials, Yuan-Jie Zhang, Wei Li, Xuan-Peng Wang, Chao-Jiang Niu, Li-Qiang Mai
Journal of Electrochemistry
One-dimensional nanomaterials have been widely studied in energy storage and conversion fields because of their unique structure and physicochemical properties. Sodium-ion batteries are highly promising and attractive for large-scale energy storage due to the truly abundant sodium resources and low cost. With the growing demand of energy and deepening of research, the evolution of structures and properties of one-dimensional nanomaterials are also experiencing from simplicity to complexity and from ordinary to excellence. Therefore, constructing complex superior one-dimensional nanomaterials has become one of the hotspot in energy storage. Based on the new advance in this field and Mai group’s work, this …
Research Progress Of Si-Based Anode Materials For Lithium-Ion Batteries,
2016
State Key Laboratory of Physical Chemistry of Solid Surfaces, State-Province Joint Engineering Laboratory of Power Source Technology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Research Progress Of Si-Based Anode Materials For Lithium-Ion Batteries, Ding-Qiong Chen, Yang Yang, Qiu-Li Li, Jin-Bao Zhao
Journal of Electrochemistry
Owing to its high theoretical specific capacity (4200 mAh·g-1), silicon is a promising candidate to replace graphite as the anode in lithium ion batteries (LIBs). However, low intrinsic electric conductivity and dramatic volume change (~ 300%) during the process of lithiation and delithiation result in electrode pulverization and capacity loss with cycling, accordingly, the application of silicon as an anode in LIBs has been severely hindered. We will discuss the structure of silicon electrode including synthesis of Si-based composites,the selection of binder for silicon and the fabrication of binder-free Si-based electrode, as well as the electrolyte additive to …
Research Progress In Cycle Stability Of Silicon Based Li-Ion Battery Anodes,
2016
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;
Research Progress In Cycle Stability Of Silicon Based Li-Ion Battery Anodes, Ze-Liang Guo, Hui Wu
Journal of Electrochemistry
Silicon(Si), with the highest specific capacity currently known, is a promising anode material for Li-ion battery. However, in the charging and discharging process, with Li atoms inserting into and breaking out of the Si crystal lattices, the Si anode undergoes enormous volume expansion and contraction, ending in pulverization. The fact that the specific capacity of bulk Si anodes drop quickly is a challenging problem. In this review, we summarize recent progresses in Si anode. We concern about the nanostructure of silicon, cooperation of silicon with other additives and macrostructure design of anodes. We discuss strengths and shortcomings of different methods, …
Electrochemical Performance Of Crystalline Li12Si7 As Anode Material For Lithium Ion Battery,
2016
State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province and School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China;
Electrochemical Performance Of Crystalline Li12Si7 As Anode Material For Lithium Ion Battery, Ya-Xiong Yang, Rui-Jun Ma, Ming-Xia Gao, Hong-Ge Pan, Yong-Feng Liu
Journal of Electrochemistry
Crystalline Li12Si7 is successfully synthesized by heating the mixture of LiH and Si with a molar ratio of 12:7, which avoids the huge difference of the melting points between Li and Si. The electrochemical performance and lithium storage mechanism of the as-prepared Li12Si7 are studied in this work. It is found that only a change in cell volume takes place without a phase change during the lithiation/delithiation of Li12Si7 at a voltage range of 0.02 ~ 0.6 V, exhibiting a solid-solution lithium storage mechanism. Such a lithium storage process effectively retards the volume effect …
Continuous Synthesis And Condition Exploration Of Precursor Ni1/3Co1/3Mn1/3(Oh)2 Ternary Cathode Material,
2016
Zibo Guoli New Power Source Technology Co., Ltd., Zibo, Shandong 255086, China; Zibo Engineering Technology Research Center of Asymmetric Large Power Capacitor Battery, Zibo, Shandong 255086, China;
Continuous Synthesis And Condition Exploration Of Precursor Ni1/3Co1/3Mn1/3(Oh)2 Ternary Cathode Material, Zhi-Jun Jiang, Ya-Li Zhang, Qian Wang, Hui Zhang
Journal of Electrochemistry
Commercial LiNi1/3Co1/3Mn1/3(OH)2 ternary material is generally prepared by a combination of co-precipitation and solid state reaction method. The particle size distribution and morphology of Ni1/3Co1/3Mn1/3(OH)2 precursor have a great impact on the electrochemical performance of LiNi1/3Co1/3Mn1/3O2. In this work, the precursor Ni1/3Co1/3Mn1/3(OH)2 ternary cathode material was prepared by co-precipitation method with MnSO4, NiSO4, and CoSO4 as raw materials, NaOH as a precipitating agent and NH3 …
The Study Of Dynamical Electrochemical Impedance Spectroscopy For Oxygen Reduction Reaction On Pt/C Catalyst,
2016
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003,Shandong, China;Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China;
The Study Of Dynamical Electrochemical Impedance Spectroscopy For Oxygen Reduction Reaction On Pt/C Catalyst, Kun-Ming Shi, Jian-Wei Guo, Jia Wang
Journal of Electrochemistry
With joint techniques of rotating disc electrode(RDE) and electrochemical impedance spectroscopy(EIS), and further establishment on equivalent circuit model, this paper studied oxygen reduction reaction(ORR) on commercial Pt/C catalyst in acid medium. Our results found that the dynamical interface on Pt/C consists of two independent processes: 1) the PtO reduction from Pt surface, 2) the new PtO formation from ORR, thus providing key clues for catalyst stability and activity. This also implied that the dynamical interface facilitates reconstruction for porous electrode, and matches with mass transfer. One important issue is discovered that at high overpotential, the high reaction rate for ORR …
The Tribology And Chemistry Of Phosphorus Containing Lubricant Additives,
2016
University of Dayton
The Tribology And Chemistry Of Phosphorus Containing Lubricant Additives, David W. Johnson
Chemistry Faculty Publications
Phosphate esters, thiophosphate esters and metal thiophosphates have been used as lubricant additives for over 50 years. Recently, phosphorus‐containing ionic liquids have emerged as a new class of lubricant additives. While the use of phosphorus compounds has been extensive, a detailed knowledge of how they work has been a much more recent development. In this chapter, the use of phosphate esters, thiophosphate esters, metal thiophosphates and phosphorus‐containing ionic liquids as antiwear or extreme pressure additives is discussed. The primary emphasis will be on how they form a protective film, which is both durable and reduces friction. The first part of …
In Situ Ion Exchange In A Micro-Porous Transition Metal Silicate Framework,
2016
Western Kentucky University
In Situ Ion Exchange In A Micro-Porous Transition Metal Silicate Framework, Jason M. Lively
Masters Theses & Specialist Projects
Ion selectivity of minerals has traditionally been utilized in industry as a catalyst, metal separation, and environmental reclamation/sequestration tool. There is an increased interest in understanding ion selectivity mechanisms of micro-porous minerals and mineral-like structures and how they can be applied in various industries: environmental and, potentially, pharmaceutical. This study seeks to understand the ion exchange mechanisms in micro-porous zirconosilicates using time-resolved Raman spectroscopy and X-ray diffraction. The thesis material was exchanged with H+, Na+, K+, and Cs+ in order to better understand structural changes as well as the influence of the H+-bonding during the exchange process. It is hypothesized …
Metal-Organic Hybrid Nanocomposites For Energy Harvesting Applications,
2016
Western Kentucky University
Metal-Organic Hybrid Nanocomposites For Energy Harvesting Applications, Thulitha Madawa Abeywickrama
Masters Theses & Specialist Projects
Various synthetic methods have been developed to produce metal nanostructures including copper and iron nanostructures. Modification of nanoparticle surface to enhance their characteristic properties through surface functionalization with organic ligands ranging from small molecules to polymeric materials including organic semiconducting polymers is a key interest in nanoscience. However, most of the synthetic methods developed in the past depend widely on non-aqueous solvents, toxic reducing agents, and high temperature and high-pressure conditions. Therefore, to produce metal nanostructures and their nanocomposites with a simpler and greener method is indeed necessary and desirable for their nano-scale applications. Hence the objective of this thesis …
Preface-Jes Focus Issue On Electrolysis For Increased Renewable Energy Penetration,
2016
Old Dominion University
Preface-Jes Focus Issue On Electrolysis For Increased Renewable Energy Penetration, B. Pivovar, M. Carmo, K. Ayers, X. Zhang, J. O'Brien
Mechanical & Aerospace Engineering Faculty Publications
(First paragraph) Today represents a particularly exciting time, as our planet’s energy system is undergoing major changes due to dramatically decreasing renewable energy prices and increasing societal concerns over greenhouse gas emissions, criteria pollutants (arsenic, mercury, NOx, particulate matter), and climate change. These factors are pushing society toward deep decarbonization of our energy system, perhaps the most challenging issue facing the planet today. Unfortunately, wind and solar energy, while both promising generation sources, come with intermittency challenges and have limitations in their abilities to impact industrial and transportation sector demands where fossil fuel energy carriers based on chemical bonds have …
An Investigation Of The Requirements For Excimer Formation And Charge Stabilization In Model Pi-Stacked Assemblies,
2016
Marquette University
An Investigation Of The Requirements For Excimer Formation And Charge Stabilization In Model Pi-Stacked Assemblies, Brandon Uhler
Dissertations (1934 -)
Formation of -stacked excimers plays an important role in many systems, ranging from biological phenomena and polymer formation and function to photovoltaic devices and organic molecular electronics. In these systems, the geometrical reorganization of the ground state upon photoexcitation is still a subject of debate. In this work, we compare the dynamics of excimer formation and hole (charge) stabilization in fluorene and fluorene-based model systems. We use a variety of gas-phase methods to examine the spectroscopy and dynamics of these systems, including Two-Color Resonant Two-Photon Ionization (2CR2PI), Hole-Burning (HB), Laser Induced Fluorescence (LIF), and Dispersed Fluorescence (DF). In order to …
Nmr Studies Of Electrochemical Energy Storage Materials,
2016
CUNY Graduate Center
Nmr Studies Of Electrochemical Energy Storage Materials, Jing Peng
Dissertations, Theses, and Capstone Projects
Electrochemical energy storage materials constitute essential elements in the development of sustainable energy technologies. They are crucial for improving the efficiency of energy storage devices to facilitate the use of renewable resources. The increasing human demands for energy and limitation of fossil fuel stimulates the continued development of energy storage materials. Better understanding of their working mechanisms and electrochemical properties from a view of chemistry is quite necessary for improving the energy storage technology. In this work, Nuclear Magnetic Resonance (NMR) has been used as a powerful tool to characterize the solvation behavior and diffusion ability of some commonly used …
Photodynamic Killing Of Human Cancer Cells With Smart Photosensitizer Materials And An Endoscopic Implement For Singlet Oxygen Delivery,
2016
CUNY Graduate Center
Photodynamic Killing Of Human Cancer Cells With Smart Photosensitizer Materials And An Endoscopic Implement For Singlet Oxygen Delivery, Mihaela N. Minnis
Dissertations, Theses, and Capstone Projects
The thesis describes progress on probe tips for a microoptic device for the precise delivery of the components necessary for photodynamic therapy (PDT) in a highly localized and controllable fashion. The thesis also summarizes results of a photosensitized oxidation study. The work focused on i) developing a photoactive fluoropolymer surface that will release sensitizer drug molecule for use in PDT, ii) designing new probe tips surfaces for use as sensitizer support for a microoptic PDT device, iii) exploring strategies for covalent attachment of sensitizers and model compounds to Teflon/PVA surfaces with the aim of being coupled with our microoptic device, …
Probing The Structure And Photophysics Of Porphyrinoid Systems For Functional Materials,
2016
CUNY Graduate Center
Probing The Structure And Photophysics Of Porphyrinoid Systems For Functional Materials, Christopher D. Farley
Dissertations, Theses, and Capstone Projects
Porphyrins (Pors) and their many cousins, including phthalocyanines (Pcs), corroles (Cors), subphthalocyanines (SubPcs), porphyrazines (Pzs), and naphthalocyanines (NPcs), play amazingly diverse roles in biological and non-biological systems because of their unique and tunable physical and chemical properties. These compounds, collectively known as porphyrinoids, can be employed in any number of functional devices that have the potential to address the challenges of modern society. Their incorporation into such devices, however, depends on many structural factors that must be well understood and carefully controlled in order to achieve the desired behavior. Self-assembly and self-organization are key processes for developing these new technologies, …
Electrophilic Activation Of Silicon–Hydrogen Bonds In Catalytic Hydrosilations,
2016
University of California, Berkeley
Electrophilic Activation Of Silicon–Hydrogen Bonds In Catalytic Hydrosilations, Mark C. Lipke, Allegra L. Liberman-Martin, T. Don Tilley
Biology, Chemistry, and Environmental Sciences Faculty Articles and Research
Hydrosilation reactions represent an important class of chemical transformations and there has been considerable recent interest in expanding the scope of these reactions by developing new catalysts. A major theme to emerge from these investigations is the development of catalysts with electrophilic character that transfer electrophilicity to silicon by Si-H activation. This type of mechanism has been proposed for catalysts ranging from Group 4 transition metals to Group 15 main group species. Additionally, other electrophilic silicon species, such as silylene complexes and η3-H2SiRR′ complexes, have been identified as intermediates in hydrosilation reactions. In this Review, different types of catalysts are …
Lubricants For Turbine Engines,
2016
University of Dayton
Lubricants For Turbine Engines, David W. Johnson
Chemistry Faculty Publications
The lubricant systems used in turbine engine applications are discussed with respect to the particular problems associated with aircraft applications. After initially describing the relevant specifications, the typical basestocks are described along with some common degradation schemes. The additive systems, including antioxidants, anti-foaming agents, and anti-wear additives needed to achieve the typical specifications, are described along with their mechanism of action and degradation mechanisms. The methods used for the monitoring of lubricant health, including in-line and offline methods, are also discussed. Finally, future changes in specifications, basestocks, and additives are discussed with respect to new, high-performance bearing materials.
