Study on Al2O3 Coated Carbon Sulfur Composite Materials for Lithium-Ion Battery

2013 ◽  
Vol 860-863 ◽  
pp. 952-955
Author(s):  
Xing Hua Liang ◽  
Chao Chao Ye ◽  
Yu Si Liu ◽  
Tian Jiao Liu ◽  
Lin Shi
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Retention Rate ◽  
Chemical Properties ◽  
Lithium Ion ◽  
Cycle Performance ◽  
Impregnation Method ◽  
Physical And Chemical ◽  
Coated Carbon ◽  
And Chemical Properties

Coated Al2O3thin film on the surface of the carbon sulfur composite material by liquid phase impregnation method, then made physical and chemical properties and electrochemical performance analysis on the coated carbon sulfur composite materials.Al2O3reduce the direct contact of the carbon sulfur composite materials and electrolyte, reducing the erosion of electrolyte on cathode materials, improve the cycle performance of carbon sulfur composite material. 0.1C in the 2.1~3.2v cycle 20 to 100 times. The capacity retention rate increased from 70% to 90% after coating.

Superdeep Penetration - Novel Method of Nanoreinforced Composites Producing Based on Metallic, Ceramic and Polymer Matrixes

2009 ◽  
Vol 79-82 ◽  
pp. 1975-1978
Author(s):  
Oleg Figovsky ◽  
Sergey Usherenko
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Chemical Properties ◽  
Second Stage ◽  
Superdeep Penetration ◽  
Third Stage ◽  
Novel Method ◽  
Two Stages ◽  
Physical And Chemical ◽  
And Chemical Properties

Now there is a motivation for creation of the materials possessing a considerable difference of physical and chemical properties in volume of composite materials 1 . Composite materials allow realizing a complex of various properties which cannot be realized simultaneously in mono material. The perspective in reception of a new smart nanomaterial is basically defined by possibilities which create processing conditions Choosing and manufacturing of fibers refers to the second stage of composite material reinforcement. Process of assemblage of a composite material from the details made at first two stages of process refers to the third stage. But at each stage of process of manufacturing of a composite material there are specific problems. The basic problem at composite material creation, as a rule, is essential contradictions between engineering solutions for various stages of process.

Study of Whiskers to be Used in Composite Materials

2021 ◽  
Vol 316 ◽  
pp. 51-55
Author(s):  
Tamara I. Shishelova ◽  
Vadim V. Fedchishin ◽  
Mikhail A. Khramovskih
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Chemical Properties ◽  
High Strength ◽  
Rapid Expansion ◽  
Physical And Chemical Properties ◽  
Reinforcement Fiber ◽  
Object Of Study ◽  
Physical And Chemical ◽  
And Chemical Properties

Rapid expansion of technologies poses higher requirements to structural materials and items made of them. Conventional materials are being replaced by composite materials (composites). Different additives enhancing the properties of initial materials are used as reinforcement fibers of composites. Utilization of micro-and nanosize particles for production of present-day materials is paid much attention to. Whiskers are among such materials. These crystals have high strength, high chemical and temperature resistance. But for rational utilization of whickers of different chemical composition in composite materials one should know their physical and chemical properties. Objectives of the paper: to study physical and chemical properties of whiskers in different compounds, their composition and structure; to prove experimentally the feasibility of utilizing whiskers as a reinforcement fiber of composite materials. Object of study: specimens of whiskers of silicon nitride (Si3N4), aluminum oxide (Al2O3), aluminum nitride (AlN), and mullite (Al6Si2O13). Methods of investigation: thermal study of specimens, study of mechanical properties and chemical strength, and IR-spectroscopy. Results of study: specimens of whiskers have been studied and their mechanical properties have been tabulated for comparison. Extensive thermal investigation was followed by deduction of regularities and identification of chemical properties of whiskers. IR-spectra of whiskers have been studied and conclusions on molecular composition and on presence of impurities in some whiskers have been made.

Effect of electrode physical and chemical properties on lithium-ion battery performance

2013 ◽  
Vol 37 (14) ◽  
pp. 1723-1736 ◽  
Author(s):  
Victor Chabot ◽  
Siamak Farhad ◽  
Zhongwei Chen ◽  
Alan S. Fung ◽  
Aiping Yu ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Chemical Properties ◽  
Lithium Ion ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
And Chemical Properties

Mechanical Property of Brucite Fiber Reinforced Composite Material

2013 ◽  
Vol 357-360 ◽  
pp. 1019-1022 ◽  
Author(s):  
Bo Wen Guan ◽  
Shuan Fa Chen ◽  
Kai Ping Liu
Keyword(s):  
Mechanical Property ◽  
Composite Material ◽  
Chemical Properties ◽  
Reinforce Concrete ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Physical And Chemical ◽  
And Chemical Properties ◽  
Reinforced Composite Material

In this paper, microstructure of brucite fiber was introduced briefly and its physical and chemical properties were given. Disperse method of fiber applied in concrete has been introduced. The effect of compressive strength, flexural strength of concrete and cement mortar by the addition of brucite fiber have also been discussed. The mechanism that fiber can reinforce concrete has been discussed. The results showed that the diameter of brucite fiber changes from micrometer scales to nanometer dimension with the dispersing action of water reducers. Brucite fiber can exert its high tensile strength on concrete and improve the mechanical property of cement motar and concrete. Life of bructie fiber reinforced composite material can be prolonged by the addition of brucite fiber.

Computer Modeling and Research of FML Composites Using the Method of Features

2015 ◽  
Vol 220-221 ◽  
pp. 837-842
Author(s):  
Michał Majzner ◽  
Andrzej Baier
Keyword(s):  
Composite Materials ◽  
Multicriteria Optimization ◽  
Chemical Properties ◽  
Fiber Composites ◽  
Probability Of Failure ◽  
Design Engineering ◽  
Physical And Chemical Properties ◽  
Construction Process ◽  
Physical And Chemical ◽  
And Chemical Properties

The use of modern materials, such as composite materials, enabling the production of new or modifying the existing design solutions, and improvement of their technical characteristics in their use in the design, engineering and manufacturing process, allows achieving an improvement of their endurance, physical and chemical properties to match the features and functionality that comply with assumptions. In research studies, it has been proposed to systematize and formalize features in the context of modeling and fabrication of objects created on the basis of structural fiber composites. The result of the study and analysis will be precisely adapted algorithm of the design and construction process and also fabrication of the structural objects made upon using composite materials. The process of multicriteria optimization and stress analysis upon using CAx-class software will enable to reduce the probability of failure or damage to the modified component.

Electroluminescence Properties of ZnO Nano-Particles Embedded in Polyimide

2011 ◽  
Vol 694 ◽  
pp. 137-141
Author(s):  
Jia Qi Lin ◽  
Jun Hui Shi ◽  
Jing Leng ◽  
Ming Hui Xia ◽  
Qing Guo Chi
Keyword(s):  
Composite Materials ◽  
Absorption Edge ◽  
Chemical Properties ◽  
Blue Shift ◽  
Uv Absorption ◽  
Nano Particles ◽  
Breakdown Field ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
And Chemical Properties

In this paper, ZnO Nano-particles is embedded in polyimide, and physical and chemical properties of polyimide/ZnO composite materials have been studied. It is found that different ZnO content will cause UV absorption edge blue shift, and EL tests show that electricity aging and pre-breakdown have changed. For PI/ZnO(1%) and PI/ZnO(2%) composite materials, Electricity aging is at 1.4Mv/cm and 1.5Mv/cm, Pre-breakdown field is at 1.9Mv/cm and 1.8Mv/cm, respectively. In addition, there are emission peaks at 442.8nm, 514.2nm, 609.4nm in the EL spectrum of the PI/ZnO (1%) films and 538nm, 633.2nm of PI/ZnO(2%) films, which indicates that some defects in this area.

Boron-doped coronenes with high redox potential for organic positive electrodes in lithium-ion batteries: a first-principles density functional theory modeling study

2018 ◽  
Vol 6 (21) ◽  
pp. 10111-10120 ◽  
Author(s):  
Yuntong Zhu ◽  
Ki Chul Kim ◽  
Seung Soon Jang
Keyword(s):  
Lithium Ion Batteries ◽  
Density Functional ◽  
Electrode Materials ◽  
Chemical Properties ◽  
Lithium Ion ◽  
Functional Theory ◽  
Positive Electrodes ◽  
Boron Doped ◽  
Physical And Chemical ◽  
And Chemical Properties

Boron-doped coronenes are attractive as promising positive electrode materials for lithium-ion batteries due to the unique physical and chemical properties of coronene.

scholarly journals SiO2@TiO2 Composite Synthesis and Its Hydrophobic Applications: A Review

Catalysts ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 171
Author(s):  
Alicia Rosales ◽  
Karen Esquivel
Keyword(s):  
Composite Material ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Research Information ◽  
Chemical Methods ◽  
Wide Range ◽  
Methods Of Synthesis ◽  
Low Toxicity ◽  
Physical And Chemical ◽  
And Chemical Properties

Titanium dioxide is well known for its photocatalytic properties and low toxicity, meanwhile, silicone dioxide exhibits hydrophobic and hydrophilic properties and thermal stability. The union of these two materials offers a composite material with a wide range of applications that relate directly to the combined properties. The SiO2-TiO2 composite has been synthesized through physical methods and chemical methods and, with adequate conditions, morphology, crystallinity, boundaries between SiO2-TiO2, among other properties, can be controlled. Thus, the applications of this composite are wide for surface applications, being primarily used as powder or coating. However, the available research information on this kind of composite material is still novel, therefore research in this field is still needed in order to clarify all the physical and chemical properties of the material. This review aims to encompass the available methods of synthesis of SiO2-TiO2 composite with modifiers or dopants, the application and known chemical and physical properties in surfaces such as glass, mortar and textile, including aspects for the development of this material.

scholarly journals Study on the Adsorption Performance of Various Adsorbents on Hazardous and Noxious Substances

2021 ◽  
Vol 299 ◽  
pp. 03002
Author(s):  
Hongyan Wang ◽  
Wen Chang ◽  
Yujun Tian
Keyword(s):  
Emergency Response ◽  
Vegetable Oil ◽  
Retention Rate ◽  
Saturated Vapor ◽  
Chemical Properties ◽  
Adsorption Performance ◽  
Import And Export ◽  
Physical And Chemical ◽  
And Chemical Properties ◽  
Noxious Substances

Hazardous and noxious substances (HNS) leakage from ship accidents has been one of the major sources of ship pollutions. Due to the varieties of HNS, the complexity of physical and chemical properties, the harmfulness of potential accidents, and the difficulty of accident prevention, HNS leakage could cause huge social and environmental impacts. HNS emergency response methods and technologies are currently in the early and exploring stage. As a big HNS import and export country with the increasing transportation volume, the risk of HNS pollution accidents in the ports has been significantly increasing over the recent years. However, few studies have been conducted regarding the HNS response technology, especially to the adsorption performance of various adsorbents against HNS. Therefore, this study aims to calculate the degree of adsorption of different adsorbents by selecting the representative HNS, which are commonly transported in the volume, for example, benzene, styrene, and vegetable oil. For inert substances with low saturated vapor pressure (vegetable oil and styrene), the degree and rate of adsorption of the investigated materials were found to be inversely proportional to the mass per unit area (area density). Moreover, these investigated adsorbents were shown to exhibit a good adsorption retention rate against inert substances. This study can provide the technical standard to select the most suitable adsorbents for the relevant HNS leakage.

scholarly journals The study of fly ash filler behaviour in the polymer matrix of polyethyleneterephthalate

2019 ◽  
pp. 28-36
Author(s):  
Tlek Ketegenov ◽  
Natalya Khan ◽  
Olesya Tyumentseva ◽  
Ardak Karagulanova
Keyword(s):  
Electron Microscopy ◽  
Composite Material ◽  
Fly Ash ◽  
Polyethylene Terephthalate ◽  
Polymer Matrix ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Optical And Electron Microscopy ◽  
Physical And Chemical ◽  
And Chemical Properties

The purpose of the investigation was to study the behavior of mechanically activated fly ash filler containing carbon in a polymer matrix of polyethylene terephthalate (PET). By means of the methods of optical and electron microscopy the change of physical and chemical properties of fly ash after intensive grinding in planetary mills of centrifugal type was considered. The research showed that mechanically activated filler, in contrast to its non-activated analog, structures the polymer matrix and provides improving the characteristics of the composite material.

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