Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"Li-Air"”.
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Characterizing mass transport and crossover reactions in Li-air batteries
Lithium air batteries (LABs) promise extremely high gravimetric energy densities. Similar to fuel cells, mass transport of redox active species, such as dissolved oxygen gas or redox mediators, is one of the challenges faced by LABs. While increasing mass transport increases LAB cell performance, …
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Tracking the Function and Failure of Li-Air Electrolytes using Electrochemical and Spectroscopic Methods
Li-air batteries (LABs) have gained significant attention due to their high gravimetric energy densities that are comparable to fossil fuels, with the added advantage of being greener than Lithium ion batteries, as they contain no transition metals. LABs rely on the reaction with O2 and the …
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Electrochemical studies of lithium-oxygen reactions for lithium-air battery applications
… understanding reaction mechanisms during Li-O₂ cell operation is critical for implementing Li-air batteries with high reversibility and long cycle life. In this thesis, the rotating ring disk electrode (RRDE) technique has been used to probe the influence of different electrolyte solvents …
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Investigation of oxidation in nonaqueous lithium-air batteries
The demand for clean energy in portable applications is driving the development of high specific energy batteries, which will enable automobiles powered by electricity derived from renewable energy sources such as solar and wind. Lithium-air batteries are a promising avenue for advancing the energy …
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Gas diffusion electrodes and operating conditions for electrochemical energy storage applications
… world today faces two contradictory challenges: climate change and energy security. Interestingly, both challenges can be potentially addressed by targeting atmospheric CO2. The global demand for energy has increased due to population growth and most of this demand is met by the dwindling resource …
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Fundamental understanding and materials design approaches for lithium-oxygen electrochemical energy storage
… needed to increase the energy and power capabilities of lithium storage devices for electric vehicle and grid-scale applications. Systems based on oxygen electrochemistry are promising due to the relatively high potentials (~ 3 V vs. Li) of Li-oxygen redox couples, which can enable high energy …
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Investigation of lithium-air battery discharge product formed on carbon nanotube and nanofiber electrodes
… for integration in a wide variety of applications since their discovery over 20 years ago. Their myriad desirable material properties including exceptional mechanical strength, high thermal conductivities, large surface-to-volume ratios, and considerable electrical conductivities, which …
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Synthesis And In-Situ Charactorization Of Energy Storage Material
… electrochemical energy storage devices, such as Li-ion batteries, Li-air batteries and supercapacitors, due to its high conductivity, high surface area, mechanical and electrochemical stability. However, the fact that graphene (and other carbon based materials) can only store charges on exposed …
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Yüksek enerji yoğunluğu gerektiren uygulamalar için grafen temelli monolit elektrotların üretilmesi, karakterizasyonu ve potansiyel uygulama alanlarının incelenmesi
… spesifik yüzey alanı, elektriksel iletkenlik ve çok düşük yoğunluk gibi özelliklere sahip olması nedeniyle, enerji depolama sistemleri başlıca uygulama alanları arasındadır. Tez kapsamında, yüksek enerji yoğunluğu gerektiren uygulamalarda kullanılabilecek, grafen temelli monolit …
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Multifunctioning Electrocatalytic Cathodes for Lithium-Air and Lithium-Oxygen Batteries
Despite its historical success, currently, the limited energy density in Li-ion batteries restricts the electrifying of transportation into small and medium-scale vehicles. On the contrary, Li- O2 batteries (LOBs) and Li-air batteries (LABs) with larger theoretical energy density are capable of …
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Li₂0₂ in Li-0₂ batteries : catalytic enhancement of electrochemical oxidation and thermophysical transformations
… in reducing dependence on foreign oil and curtailing global warming. However, optimal market penetration of electric vehicles is confronted with the prohibitive cost and limited energy capacity of current state of the art lithium-ion battery packs, factors which limit range below 300 miles. …
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Fundamental understanding and design principles of oxide/metal surfaces for lithium storage
Lithium-battery technologies have promising potentials to enable efficient energy distribution, sustainable transportation systems, and the widespread of renewable energy. One of the most critical challenges that limits their further advances is the limited ability to design efficient interfacial …
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Intraurban Spatiotemporal Variability of Ambient Air Pollutants across Metropolitan St. Louis
<p>Ambient air monitoring networks have been established in the United States since the 1970s to comply with the Clean Air Act. The monitoring networks are primarily used to determine compliance but also provide substantive support to air quality management and air quality research including …