Chemical Engineering Commons^™

Catalysts For Polymer Membrane Fuel Cells, William E. Mustain, Bryan Pivovar

Faculty Publications

No abstract provided.

Carbon-Based Artificial Sei Layers For Aqueous Lithium-Ion Battery Anodes, Usha Subramanya, Charleston Chua, Victor Gin He Leong, Ryan Robinson, Gwenlyn Cruz Cabiltes, Prakirti Singh, Bonnie Yip, Anuja Bokare, Folarin Erogbogbo, Dahyun Oh

Faculty Publications

Replacing flammable organic electrolytes with aqueous electrolytes in lithium-ion batteries (LIB) can greatly enhance the safety of next-generation energy storage systems. With the extended electrochemical stability window of electrolytes, 'water-in-salt' (WIS) electrolytes containing LIB presented significant performance improvements. However, the solubility limits of lithium salts in water restrain the extent of kinetic protection offered by the high salt concentration. Here, we report design strategies of anode structure to improve the cycle life of LIB with WIS electrolytes. We introduced partially graphitic protective carbon layers on anode particles using a versatile coating method. This protective layer not only improved charge transfer …

Load-Balancing Rendezvous Approach For Mobility-Enabled Adaptive Energy-Efficient Data Collection In Wsns, Jian Zhang, Jian Tang, Zhonghui Wang, Feng Wang, Gang Yu

Faculty and Student Publications

Copyright © 2020 KSII The tradeoff between energy conservation and traffic balancing is a dilemma problem in Wireless Sensor Networks (WSNs). By analyzing the intrinsic relationship between cluster properties and long distance transmission energy consumption, we characterize three node sets of the cluster as a theoretical foundation to enhance high performance of WSNs, and propose optimal solutions by introducing rendezvous and Mobile Elements (MEs) to optimize energy consumption for prolonging the lifetime of WSNs. First, we exploit an approximate method based on the transmission distance from the different node to an ME to select suboptimal Rendezvous Point (RP) on the …

Revisiting Lightweight Encryption For Iot Applications: Error Performance And Throughput In Wireless Fading Channels With And Without Coding, Yazid M. Khattabi, Mustafa M. Matalgah, Mohammed M. Olama

Faculty and Student Publications

© 2013 IEEE. Employing heavy conventional encryption algorithms in communications suffers from added overhead and processing time delay; and in wireless communications, in particular, suffers from severe performance deterioration (avalanche effect) due to fading. Consequently, a tremendous reduction in data throughput and increase in complexity and time delay may occur especially when information traverse resource-limited devices as in Internet-of-Things (IoT) applications. To overcome these drawbacks, efficient lightweight encryption algorithms have been recently proposed in literature. One of those, that is of particular interest, requires using conventional encryption only for the first block of data in a given frame being transmitted. …

Cooperative Relay Selection For Load Balancing With Mobility In Hierarchical Wsns: A Multi-Armed Bandit Approach, Jian Zhang, Jian Tang, Feng Wang

Faculty and Student Publications

© 2013 IEEE. Energy efficiency is the major concern in hierarchical wireless sensor networks(WSNs), where the major energy consumption originates from radios for communication. Due to notable energy expenditure of long-range transmission for cluster members and data aggregation for Cluster Head (CH), saving and balancing energy consumption is a tricky challenge in WSNs. In this paper, we design a CH selection mechanism with a mobile sink (MS) while proposing relay selection algorithms with multi-user multi-armed bandit (UM-MAB) to solve the problem of energy efficiency. According to the definition of node density and residual energy, we propose a conception referred to …

Tuning The Size And Composition Of Manganese Oxide Nanoparticles Through Varying Temperature Ramp And Aging Time, Celia Martinez De La Torre, Jasmine H. Grossman, Andrey A. Bobko, Margaret F. Bennewitz

Faculty & Staff Scholarship

Manganese oxide (MnO) nanoparticles (NPs) can serve as robust pH-sensitive contrast agents for magnetic resonance imaging (MRI) due to Mn2+ release at low pH, which generates a ~30 fold change in T1 relaxivity. Strategies to control NP size, composition, and Mn2+ dissolution rates are essential to improve diagnostic performance of pH-responsive MnO NPs. We are the first to demonstrate that MnO NP size and composition can be tuned by the temperature ramping rate and aging time used during thermal decomposition of manganese(II) acetylacetonate. Two different temperature ramping rates (10°C/min and 20°C/min) were applied to reach 300°C and NPs were aged …

Investigating New Methods To Develop Perovskite Solar Cells, Amani Hussain Alfaifi

Electronic Theses and Dissertations

Discovering the potential of organic-inorganic metal halide perovskites (MHP) as a harvesting material in solar cells has strongly affected the research direction in solar energy. The fascinating optical and electronic properties offered by MHP combined with tremendous effort from scientists around the world have improved the efficiency to about 25% in a decade.

In the first part of the dissertation, we studied the lamination process as a new fabrication method for producing self-encapsulated perovskite solar cells based on laminating half stacks,as opposed to the conventional layer-by-layer method. Our work focused on optimizing the lamination process of complex triple cations perovskite …

Experimental Investigation Of Low-Voltage Silicon Carbide (Sic) Semiconductor Devices For Power Conversion Applications, Saleh Salem H. Alharbi

Electronic Theses and Dissertations

Enhancing the performance and efficiency of power converter systems requires fast-switching power devices with considerably low switching and conduction losses. Silicon (Si) semiconductor devices are the essential components in electronic converter designs, and their behaviors and switching characteristics determine the system’s overall performance and efficiency. These conventional Si devices are nearing to hit their physical and operational limits in meeting power converter requirements with respect to high temperature and large voltage conditions. However, silicon carbide (SiC) power devices enable greater converter efficiency and better power density, particularly under hard switching frequencies and high output voltages due to their outstanding material …

Experimental Evaluation Of Medium-Voltage Cascode Gallium Nitride (Gan) Devices For Bidirectional Dc–Dc Converters, Salah Salem H. Alharbi

Electronic Theses and Dissertations

As renewable energy sources, such as photovoltaic (PV) cells and wind turbines, are rapidly implemented in DC microgrids, energy storage systems play an increasingly significant role in ensuring uninterrupted power supply and in supporting the reliability and stability of microgrid operations. Power electronics, especially bidirectional DC–DC converters, are essential parts in distributed energy storage and alternative energy systems because of their grid synchronization, DC power management, and bidirectional power flow capabilities. While there is increasing demand for more efficient, compact, and reliable power converters in numerous applications, most existing power converters are hindered by traditional silicon (Si) based semiconductors, which …

Enhancing Protection Of Vehicle Drivers And Road Safety By Deploying Adas And Facial Features Pattern Analysis (Ffpa) Technologies, Raymond Sze Wai Fu, Xueying Wang, Antonio Wong, Chi-Wing Tsang

Faculty of Science & Technology (THEi)

The latest technology associated with Intelligent Transportation Systems (ITS) have been designed with the aim to minimize the numbers of person injury in road accidents and improve the overall road safety. The driver behavior is one major concern in many accidents in HK urban road links. In particular, the driver's attitudes, such as fatigue, drowsiness and concentration are the major causes to road accidents. It will affect the driver's ability and decisions in properly controlling their vehicles. Very often, this kind of driver distraction is particularly obvious when driving after 2 to 3 hours from most research sources. In the …

Seed-Mediated Crystallization Of Charge-Transfer Complexes And Their Applications For Gas Sensing, Xuecheng Yu

Wayne State University Dissertations

The dissertation focused on controllable seed-mediated nucleaton of charge transfer complex, namely tetrathiafulvalene bromide ((TTF)Br) and Krogmann’s salts (KCP), and their applications in sensing. On gold nanoparticle (AuNP) decorated highly oriented pyrolytic graphite (HOPG) substrate, the presence of AuNP promotes the formation of charge transfer salt nanowires. The size of these nanowires, both (TTF)Br and KCP, were found to be confined by the size of AuNPs, shown by SEM and AFM characterization. On micro-disk electrodes, charge transfer salt nanowires were found to own a linear time dependency, by both SEM and in-situ optical microscopy. The micro-disk electrodes promoted higher crystallization …

Timcc: On Data Freshness In Privacy-Preserving Incentive Mechanism Design For Continuous Crowdsensing Using Reverse Auction, Xiaoqiang Ma, Weiwei Deng, Feng Wang, Menglan Hu, Fei Chen, Mohammad Mehedi Hassan

Faculty and Student Publications

© 2013 IEEE. As an emerging paradigm that leverages the wisdom and efforts of the crowd, mobile crowdsensing has shown its great potential to collect distributed data. The crowd may incur such costs and risks as energy consumption, memory consumption, and privacy leakage when performing various tasks, so they may not be willing to participate in crowdsensing tasks unless they are well-paid. Hence, a proper privacy-preserving incentive mechanism is of great significance to motivate users to join, which has attracted a lot of research efforts. Most of the existing works regard tasks as one-shot tasks, which may not work very …

Dispersion Of Spherical Silicon Dioxide Nanoparticles In Poly(Styrene-B-Methyl Methacrylate) Diblock Copolymer Domains, Joshua C. Obinwa

Master's Theses

Polymer-nanoparticle hybrids are nanomaterials in which the unique properties of the nanosized structures can be precisely tuned by choosing an appropriate combination of the polymer and the nanoparticle. However, nanoparticle dispersion in a polymer is challenging due to the aggregation tendency of nanoparticles. To improve nanoparticle dispersion and control the location of nanoparticles in block copolymer assemblies, the nanoparticle surface is modified with surface ligands compatible with the block copolymer. In this thesis, hydroxyl-terminated poly(styrene-b-methyl methacrylate) (PS-b-PMMA) was utilized to functionalize the nanoparticle surface, covalently anchoring the hydroxylterminated end of the polymer onto the silicon dioxide nanoparticles. The silicon dioxide …

Molecular Weight And Heating Value Of Lignin Extracted Using Deep Eutectic Solvent., Ekugbere Owen Owhe

Master's Theses

The molecular weight of lignin helps us to determine how lignin can be applied accurately in industry. The molecular weight can predict the behavior of lignin, and how it will function when combined with other materials. This thesis discusses how the molecular weight of lignin can be found with gel permeation chromatography (GPC) after acetylation with acetic anhydride and pyridine. Different lignins gave different number average molecular weight and weight average molecular weight values, which were likely due to the biomass source, type of extraction and solubility in the solvent of choice. How the structure of lignin changed after derivatization …

Che 472-Hm2: Process And Plant Design Honors, Nellone Reid

Chemical and Materials Engineering Syllabi

No abstract provided.

Aqueous And Oil Products From Hydrothermal Liquefaction Of Manure Digestate, Kenzie Burns

Honors Theses

Hydrothermal liquefaction is a promising thermochemical waste-to-energy (WtE) technology for conversion of wet biomasses, such as manure and digested manure, into value-added products, namely energy-rich biofuel and a nutrient-rich aqueous product. WtE technologies can address environmental issues relating to overproduction of organic wastes and increasing dependence on fossil fuels, which leads to climate change. HTL has not been implemented on a commercial scale, in part due to the uncertainty regarding specific reaction pathways for different feedstocks and ideal conditions for production of the most valuable products.

This research investigates the compositions of the aqueous and oil products from HTL of …

Ac Conductivity Studies Of Polyethylene-Oxide-Garnet Type Li7la3zr2o12 Hybrid Composite Solid Polymer Electrolyte For Li-Ion Battery, Parisa Bashiri

Wayne State University Dissertations

Solid electrolytes including ceramics and polymers are considered to be the ultimate substitute for organic liquid electrolytes currently used in commercialized lithium ion batteries to address the safety concerns due to Li dendrite growth and internal short circuiting. However, low ionic conductivity due to high grain boundary resistance in ceramics and semi-crystalline nature of polymers has held back the solid electrolytes from being used in Li-ion batteries. Polyethylene oxide (PEO), complexed with a Li-salt, is a well-studied polymer electrolyte showing ionic conductivity properties at room temperature. However, the coexistence of amorphous and crystalline regions at room temperature (< Tm, the melting temperature) has

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Integral Mass Balance (Imb) Method For Measuring Multicomponent Gas Adsorption Equilibria In Nanoporous Materials, Darren P. Broom, Orhan Talu, Michael J. Benham

Chemical & Biomedical Engineering Faculty Publications

© 2020 American Chemical Society. To assess the performance of an adsorbent for a particular gas separation, and for process design, it is necessary to determine multicomponent gas adsorption equilibria, either experimentally or from predictions based on models or theory. The experimental techniques commonly used for this purpose, however, are time-consuming and typically require large samples. In this article, we describe a new approach, called the Integral Mass Balance (IMB) method, which combines the controlled flow of a gas mixture with in situ gravimetric measurement and gas composition analysis using quadrupole mass spectrometry. The IMB method allows very rapid equilibrium …

Thermoanalytical Studies On The Decomposition Of Energetic Ionic Liquids, Alan Esparza

Open Access Theses & Dissertations

Hydrazine has been extensively used as a propellant for space applications for more than half a century. However, its hazardous characteristics cause high storage and handling costs. For this reason, the search for alternatives, the so-called “green monopropellants,” is of great interest. Most green monopropellants are mixtures of an oxidizer and a fuel, and several ionic liquids (ILs) have been proposed for this application. Among them, hydroxylammonium nitrate (HAN) and 2-hydroxylethylhydrazinium nitrate (HEHN) are promising oxidizer and fuel, respectively. The objective of the present work was to clarify the decomposition kinetics of both HAN and HEHN, using thermogravimetric analysis (TGA), …

การพัฒนาเมมเบรนเพื่อจับแก๊สคาร์บอนไดออกไซด์ด้วยกระบวนการเมมเบรนแก๊สแอบซอร์ปชัน, สุพิชญา ศรีสดใส

Chulalongkorn University Theses and Dissertations (Chula ETD)

งานวิจัยนี้ศึกษาเกี่ยวกับปัจจัยในการขึ้นรูปของเมมเบรนชนิดแผ่นเรียบด้วยวิธีการเปลี่ยนวัฏภาคเพื่อทดสอบประสิทธิภาพการจับแก๊สคาร์บอนไดออกไซด์ด้วยกระบวนการเมมเบรนแก๊สแอบซอร์ปชันซึ่งในกระบวนการดังกล่าวมักพบปัญหาสำคัญที่เกิดจากการใช้งานคือการเปียกของเมมเบรน ซึ่งก่อให้เกิดความเสียหายต่อเมมเบรนและประสิทธิภาพของเมมเบรนในการจับแก๊สคาร์บอนไดออกไซด์ลดน้อยลง โดยในงานวิจัยนี้สนใจที่จะนำสาร 2 ประเภทคือ แอลกอฮอล์ (เมทานอลและเอทานอล) และคาร์บอนแบล็คมาใช้เป็นสารเติมแต่งให้กับสารละลายพอลิไวนิลลิดีนฟลูออไรด์เพื่อปรับโครงสร้างสัณฐานวิทยาและคุณสมบัติความไม่ชอบน้ำของเมมเบรน ผลการศึกษาพบว่าเมื่อเติมสารเติมแต่งประเภทแอลกอฮอล์แล้ว สามารถช่วยเพิ่มขนาดของรูพรุนและความพรุนบนพื้นผิวเมมเบรนได้ โดยเมื่อเติมสารเติมแต่งเมทานอลกับคาร์บอนแบล็ค 5 เปอร์เซ็นโดยน้ำหนักสามารถลดขนาดรูพรุนเฉลี่ยได้ ซึ่งมีค่าเท่ากับ 192.5 นาโนเมตรเนื่องจากสามารถลดค่าความเข้ากันได้ของตัวทำละลายและตัวไม่ละลาย (น้ำ) ที่มีผลต่อการเปลี่ยนวัฏภาคของเมมเบรนให้ช้าลงและเมื่อเพิ่มปริมาณของคาร์บอนแบล็คที่ความเข้มข้นแตกต่างกัน (2.5, 5, 7.5 เปอร์เซ็นโดยน้ำหนัก) ทำให้เพิ่มค่ามุมสัมผัสของความไม่ชอบน้ำของเมมเบรนจาก 79 องศาเป็น 88 องศาและความพรุนบนพี้นผิวของเมมเบรนที่เพิ่มมากขึ้น เมื่อนำไปทดสอบด้วยกระบวนการเมมเบรนแก๊สแอบซอร์ปชันโดยใช้โมโนเอทาโนลามีน 3 โมลาร์เป็นสารดูดซึม ได้ค่าฟลักซ์ของการดูดซึมแก๊สคาร์บอนไดออกไซด์ที่ 3.57±1.1 มิลลิโมลต่อตารางเมตรต่อวินาที

การออกแบบการบูรณาการความร้อนของกระบวนการผลิตแอลฟ่าเมทิลเอสเตอร์ซัลโฟเนท, กฤตวิทย์ ชอบทำดี

Chulalongkorn University Theses and Dissertations (Chula ETD)

แอลฟ่าเมทิลเอสเทอร์ซัลโฟเนทเป็นสารลดแรงตึงผิวที่ผลิตจากเคมีชีวภาพจากน้ำมันพืชหรือไขมันสัตว์ ซึ่งเป็นสารลดแรงตึงผิวที่มีคุณภาพดีและมีคุณสมบัติใกล้เคียงกับโซเดียมโดเดซิลเบนซีนซัลโฟเนท โซเดียมลอริลอีเทอร์ซัลเฟต และโซเดียมโดเดซิลซัลเฟต ที่เป็นสารลดแรงตึงผิวที่ผลิตมาจากปิโตรเลียม เนื่องจากแนวทางการใช้พลังงานเชื้อเพลิงของโลกเปลี่ยนแปลงในอนาคต จะส่งผลให้ความต้องการใช้เมทิลเอสเทอร์ในอนาคตมีแนวโน้มลดลง งานวิจัยนี้ได้ศึกษากระบวนการผลิตแอลฟ่าเมทิลเอสเทอร์ซัลโฟเนท เนื่องจากเป็นสารเคมีที่ใช้เมทิลเอสเทอร์เป็นสารตั้งต้นในกระบวนการผลิต ทำให้เป็นโอกาสที่จะชดเชยการใช้เมทิลเอสเทอร์เป็นพลังงานเชื้อเพลิงที่ลดลงได้ ซึ่งในกระบวนการผลิตแอลฟ่าเมทิลเอสเทอร์ซัลโฟเนทเป็นกระบวนการผลิตที่คายพลังงานความร้อนออกจากกระบวนการผลิต จึงเห็นโอกาสในการนำพลังงานกลับมาใช้เกิดประโยชน์อีกทั้งเป็นการช่วยลดต้นทุนในการผลิตของเเอลฟ่าเมทิลเอสเทอร์ซัลโฟเนทได้อีกด้วย โดยมีวัตถุประสงค์ของงานวิจัย คือ เพื่อปรับปรุงและพัฒนาประสิทธิภาพของเครื่องแลกเปลี่ยนความร้อนโดยการออกแบบเครื่องแลกเปลี่ยนความร้อนแบบเครือข่าย ศึกษาและวิเคราะห์ผลการออกแบบเครื่องแลกเปลี่ยนความร้อนแบบเครือข่ายและความเป็นไปได้ในการลงทุนโดยใช้โปรแกรม Aspen plus และ Aspen energy analyzer โดยผลการสร้างแบบจำลองพบว่าการใช้น้ำเป็นสารหล่อเย็นในกระบวนการผลิตจะส่งให้พื้นที่รวมของเครื่องแลกเปลี่ยนความร้อนน้อยกว่าการใช้อากาศเป็นสารหล่อเย็นและแบบจำลองดังกล่าวสามารถผลิตไอน้ำจากกระบวนการผลิตได้ 25,000 กิโลกรัมต่อชั่วโมง ที่ความดันของไอน้ำ 3 บาร์ สามารลดปริมาณการใช้เอททีลีนไกลคอนได้ 11,085 กิโลกรัมต่อชั่วโมงโดยใช้เมทานอลในกระบวนการผลิตมาแลกเปลี่ยนความร้อนแทนและสามารถลดพื้นที่แลกเปลี่ยนความร้อนรวมของกระบวนการผลิตเหลือเป็น 394.70 ตารางเมตร

Tuning The Activity And Stability Of Platinum Nanoparticles Toward The Catalysis Of The Formic Acid Electrooxidation, Islam M. Al-Akraa, Bilquis A. Al-Qodami, Santosh Sridhar Mysore Dr, R. Viswanatha Dr, Abdul Kareem Thottoli, Ahmad M. Mohammad

Chemical Engineering

No abstract provided.

Preparation And Characterization Of Ceramic Nanofiltration Membrane Prepared From Hazardous Industrial Waste, Shereen Kamel Amin, Mai Hassan Roushdy, Heba Mohamed Abdallah, Ahmed Mostafa, Magdi Fouad Abadir

Chemical Engineering

Kiln rollers, which are widely used in ceramic tiles production, are usually subjected to surface grinding to remove the contaminations. The resulted fine powder is considered useless waste and a hazardous source of environmental pollution particularly as it contains health‐threatening fine free silica. In the present paper, the grind waste from kiln rollers was reused as raw material in the fabrication of nanofiltration cerramic membrane. The samples of produced ceramic membranes were formed into disks by adding 15% (by weight) organic binder solution with 2% concentration, then pressed at 35 MPa, dried and fired at temperatures range from 1100°C to …

Preparation Of Ceramic Membranes From Sludge Waste, Mai H. Roushdy

Chemical Engineering

Ceramic tiles industry produces industrial waste wit large amount which become a worldwide problem. Ceramic sludge produced from ceramic tiles wastewater treatment plant is routinely discarded as a useless waste. The aim of this paper is to recycle the ceramic sludge waste to be used as raw material for ceramic membrane production. The ceramic sludge was collected, dried, and characterized by mineralogical composition (XRD), thermal analysis (DTA and TGA), and chemical composition determination (XRF). The support ceramic membrane samples were formed, pressed, dried then fired using temperatures from 1050 to 1200 °C for 1 to 3 hours. Verification parameters were …

Development Of Novel Adsorbent For Industrial Waste Water Treatment, Hassaan M. Shehata, Dalia A. Ali, Islam M. Al-Akraa Dr, Hany A. Elazab, Hoda A. Elsawy Dr

Chemical Engineering

The main objective of this research project is to perform some experimental procedures to inform the ability of the novel adsorbent used in this project. The chemical modification of the adsorbent is the chemical oxidation of pure powder chitosan using some specific redox pairs which are potassium dichromate and sodium bisulphite. After preparing the modified chitosan, there are some parameters that must be discussed during the adsorption process. The first parameter is the time parameter, showing experimentally the optimum time for adsorption under certain conditions by collecting values of absorbance and concentration of thymol blue adsorbed after the process from …

Synthesis And Characterization Of Chitosan Based Catalyst For Catalysis Applications, Mostafa Radwan

Chemical Engineering

In this research, chitosan based catalyst synthesis and characterization was investigated for different application in catalysis as chitosan based catalyst was combined with metal oxides in order to be used in dye removal of methyl orange (MO). Diluted acetic acid was used to dissolve chitosan then different percentages for metallic ions were mixed with diluted chitosan and then, 500 μL were added to the sample to reduce the metal salts then, microwave was used to heat the mixture for 5 minutes and then dried at 80-100 °C. Finally, X- ray diffraction was used to confirm the catalyst prepared. The aim …

Integrated Approach To Investigate The Wellbore Integrity Under Downhole Conditions, Weicheng Zhang

Doctoral Dissertations

“The integrity of the cement sheath is the key part to maintain zonal isolation and prevent the inter-zonal communication. Loads arising from multiple stages of wellbore life span may induce various modes of cement failure within the cement (disking and radial cracks) and at the cement-casing and the cement-formation interfaces (debonding fractures). This research utilizes the integrated laboratory and numerical approach to investigate the cement hardening process, to predict the cement failure under various loading conditions. An innovative experimental setup is established to measure the cement pore pressure variation during the hardening process under downhole conditions, and a staged 3D …

Investigation On Nanoparticle Based Combination Therapy For Targeted Cancer Treatment, Muhammad Raisul Abedin

Doctoral Dissertations

“The current treatment methods in cancer are associated with toxicity in healthy tissues, partial therapeutic response, drug resistance and finally recurrence of the disease. The cancer drugs are challenged by non-specific binding, undesired toxicity in healthy cells, low therapeutic index and finally poor therapeutic outcome. In this work, a targeted nanoscale therapeutic system Antibody Drug Nanoparticle (ADN) was engineered to selectively inhibit the breast cancer cell growth with reduced toxicity in healthy cells. The ADNs were designed by synthesizing rod shaped anoparticles using pure chemotherapeutic drug and covalently conjugating a therapeutic monoclonal antibody (mAb) on the surface of the drug …

Process Intensification Of Fuel Synthesis And Electrolysis, Jeremy Lee Hartvigsen

Doctoral Dissertations

”As more renewable energy is added to the electric grid, energy storage becomes a high priority. Suggestions have been made for energy storage in the form of fuel and chemicals. Currently, Solid Oxide Electrolysis systems can operate in endothermic mode and reduce the electrical requirement by supplying heat. Fuel synthesis from syngas is exothermic and can supply heat. However, the temperature mismatch in the normal operation of the electrolysis step and fuel synthesis step makes the direct utilization of this heat impossible. This work explores possibilities of alternate arrangements of coupling electrochemical systems and chemical synthesis. This work also explores …

Strategies To Improve The Electrochemical Performance Of Lithium-Ion Batteries By Stabilizing The Interface Of Electrode/Electrolyte, Ye Jin

Doctoral Dissertations

”Lithium-ion batteries (LIBs) provide great potential for electric vehicles, and smart grids as future energy-storage devices. However, there are many challenges in the development of the LIB industry, including low energy and power density of electrode materials, poor rate performance, short cycle life of electrode materials, and safety issues caused by the flammability of the conventional organic liquid electrolytes.

In this research, we were committed to using general approach to efficiently and economically synthesize or modify LIB materials by stabilizing the interface between electrode and electrolyte. Atomic layer deposition (ALD) method was used to coat metal oxide thin films on …