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Full-Text Articles in Engineering
Effects Of Metal Sulfate Electrolyte Additives On Charge Acceptance In Agm Batteries, Alex Drake
Effects Of Metal Sulfate Electrolyte Additives On Charge Acceptance In Agm Batteries, Alex Drake
Theses and Dissertations
In the United States the transportation sector is the second largest source of greenhouse gas emissions, making up 27% of the total greenhouse gas emitted in 2015. Within the transportation sector passenger vehicles make up the largest percentage of emissions at 41.6% [1]. To help curb passenger vehicle CO2 emissions manufacturers are adopting increasing amounts of hybrid technology. Micro-hybrid technology utilizes a typical internal combustion engine and lead-acid battery partnered with Start-Stop technology and regenerative breaking to decrease emissions by 5-12%. To keep up with the electrical demands of this type of use, advanced lead acid batteries in the form …
Irradiation Effects On Titanium Dioxide Electrodes For Lithium Ion Batteries, Kassiopeia Ann Smith
Irradiation Effects On Titanium Dioxide Electrodes For Lithium Ion Batteries, Kassiopeia Ann Smith
Boise State University Theses and Dissertations
This dissertation presents the mechanisms of irradiation induced defects and the resulting electrochemical response of TiO2 anode for lithium-ion-batteries. The objective is to realize pathways by which irradiation could be used to enhance the energy density of rechargeable lithium ion batteries in order to provide power to applications under extreme environments. Recent studies suggest that the presence of structural defects (e.g. vacancies and interstitials) in metal oxides may enhance the electrochemical charge storage capacity in electrode materials. One approach to induce defect formation in electrode materials is to use ion irradiation, which has been proven to produce point …
Analysis Of The Properties Of Supercapacitors And Possible Applications For The Technology, Vincent Oliveto
Analysis Of The Properties Of Supercapacitors And Possible Applications For The Technology, Vincent Oliveto
Honors Theses
Supercapacitors have a lot of excellent qualities that would make them a great substitute for batteries when it comes to electrical energy storage systems. Supercapacitors can discharge and charge very rapidly, they have a lifespan in the realm of millions of cycles, and they are much more efficient than batteries. Unfortunately, they cannot hold nearly as much charge as batteries. This paper seeks to further investigate the properties of supercapacitor technology and the best way to exploit these properties with the purpose of integrating them into renewable energy systems. There is currently a lot of research occurring around the world …
Solid Polymer Electrolytes From Crosslinked Polytetrahydrofuran For Calcium Ion Conduction, Jiayue Wang
Solid Polymer Electrolytes From Crosslinked Polytetrahydrofuran For Calcium Ion Conduction, Jiayue Wang
Theses - ALL
Polytetrahydrofuran (PTHF) and 3,4-epoxycyclohexylmethyl 3ʹ,4ʹ-epoxycyclohexane carboxylate (Epoxy) were crosslinked by photocuring via active monomer mechanism to make solid state networks. The networks were loaded with various amounts of calcium salt and calcium nitrate to create calcium ion solid state electrolytes. The loading range includes both salt-in-polymer and polymer-in-salt regimes. The O:Ca ratios range from 1.1 to 13.8. The ion-conductivity determined by electrochemical spectroscopy impedance and thermal properties (TGA, DSC) and Raman spectroscopy of PTHF-Epoxy/Ca(NO3)2 polymer electrolytes were measured. All samples were rubber-like and stable at temperatures from room temperature to 120 °C. With increase of salt loading, ion-conductivities of electrolytes …
Autonomous Uav Battery Swapping, Reed Jacobsen, Nikolai Ruhe, Nathan Dornback
Autonomous Uav Battery Swapping, Reed Jacobsen, Nikolai Ruhe, Nathan Dornback
Williams Honors College, Honors Research Projects
One of the main hindrances of unmanned aerial vehicle (UAV) technology are power constraints. One way to alleviate some power constraints would be for two UAVs to exchange batteries while both are in flight. Autonomous mid-air battery swapping will expand the scope of UAV technology by allowing for indefinite flight times and longer missions. A single board computer will control each UAV’s flight software to respond to inputs to align with each other mid-flight. When the two UAVs have joined, mechanical components will exchange a depleted battery on the worker UAV for a freshly charged battery that belongs to the …
Novel Technique Of Fabrication Of Porous Copper And Copper Oxide To Improve The Lithium Ion Battery Performance, Raju Prasad Ghimire
Novel Technique Of Fabrication Of Porous Copper And Copper Oxide To Improve The Lithium Ion Battery Performance, Raju Prasad Ghimire
Electronic Theses and Dissertations
Due to widespread and long-term application, Lithium-ion batteries are considered as promising power sources for portable devices, satellites, medical instruments, computers, electric vehicles and grid application. It started to occupy the market once Sony commercialized in 1991. Rechargeable lithium ion batteries drawing people attention due to their peculiar properties such as high energy density and low self-discharge compared to other alkali metals. However, these widespread and long-term applications still require better batteries in terms of performance, safety and cost, which can be achieved by better utilization of anode materials and/or an optimized design of battery configuration. There are several challenges …
Fabrication And Characterizations Of Lagp/Peo Composite Electrolytes For All Solid-State Lithium-Ion Batteries, Jeremy J. Lee
Fabrication And Characterizations Of Lagp/Peo Composite Electrolytes For All Solid-State Lithium-Ion Batteries, Jeremy J. Lee
Browse all Theses and Dissertations
With the rise of electric vehicles and increasing dependence on mobile electronics, the demands for lithium-ion batteries have followed in tandem for their high energy and power densities. However, traditional lithium-ion batteries consisting of liquid electrolytes have limited operating temperatures and are susceptible to ignition and subsequent fires. Recently, battery research has diverged into solid state chemistry to address the aforementioned issues. In this research, we systematically investigate a series of ceramic/polymer lithium-ion conducting composite electrolytes, i.e. Li1.4Al0.4Ge1.6(PO4)3 /lithiated polyethylene oxide (LAGP/PEO). Lithiated PEO was prepared with two different lithium salts, LiBF4 and LITFSI. The impacts of the LAGP on …
Understanding Of Molecular Interactions And Reversibility In Silylamines, Josephine Chen
Understanding Of Molecular Interactions And Reversibility In Silylamines, Josephine Chen
Dissertations and Theses
Modern Li-ion batteries employ flammable electrolytes that pose safety concerns. Battery safety has become important as several incidents involving Li-ion battery fires have been observed. This issue could be addressed through a switchable battery electrolyte. Reversible ionic liquids (RevILs) could be used in such an electrolyte that would cease operation in the event of rapid temperature elevation because they can switch between states of drastically different properties upon the application of an external stimulus, such as temperature or CO2 addition. Silylamines, in particular, are a class of thermally responsive RevILs that are conducting in its ionic liquid (RevIL) state …