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 20 of 57 for “"liquid electrolyte"”.
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Quantitative Solid Electrolyte Interphase-Based Descriptors for Lithium Liquid Electrolyte Design
… This shortfall derives from parasitic Li-electrolyte reactions that lead to accumulation of inactive Li⁰ and electrolyte-derived byproducts, which result in the formation of a native solid electrolyte interphase (SEI). The SEI is an electrolyte-derived passivating layer that ideally …
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The design of a microfabricated air electrode for liquid electrolyte fuel cells
… applied to the design of an air electrode for liquid electrolyte fuel cells. The catalyst layer of the electrode is envisioned to be fabricated by using a microfabricated die to apply a three-dimensionally patterned macro-texture upon a microporous carbon matrix. The resulting dual porosity …
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Revealing SEI Formation and Evolution at the Li Anode/Liquid Electrolyte Interface in Li-ion Batteries by in situ Fourier Transform Infrared Spectroscopy
… FTIR method is developed to probe the Li anode/liquid electrolyte interface. Three different conventional electrolyte systems were tested: 1.2 M LiPF₆ in EC, 1.0 M LiPF₆ in EMC, and LP57 (1.0 M LiPF₆ in EC:EMC (3/7 vol %)). Using the spectroelectrochemical cell, FTIR measurements for first …
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Integration of composite nanomaterials into anode and cathode designs
… buckeye and toray papers for air-breathing and liquid electrolyte modes. Buckeye and 0.11mm-thick toray papers are used to design the air-breathing cathode by immobilization of Laccase using a non-covalent linking agent. The liquid electrolyte cathode, designed to be applied in implantable …
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Synthesis and electrochemical characterization of lithium vanadium phosphate
… cathodes were used in lithium anode, LiPF6 liquid electrolyte, Swage-type cells that were galvanostatically cycled from 3.OV to 4.2V and from 3.4V to 4.8V at C/20 rates. Electrochemical impedance spectroscopy was carried out on an LVP / liquid electrolyte / LVP cells from 0.01Hz to 1MHz. …
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Organic electrodes and solid-state electrolytes for lithium electrochemical energy storage
… for positive electrodes and solid-state electrolytes to address these challenges. The positive electrode is one of the main limitations to improving both the capacity and cost of lithium-ion batteries. Organic molecules represent a class of materials, which if selected correctly, can …
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Engineering gas diffusion electrodes for electrochemical carbon dioxide upgrading
… the limited CO₂ flux through bulk volumes of liquid electrolyte limit the effective reaction rate of CO₂ when using promising catalyst systems.
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Poly(dimethylsiloxane)-Based Microfluidic Electrochemical Devices
… that are embedded and fully immersed in liquid electrolyte confined in the channels of a PDMS-based microfluidic network. A hydrogen-air fuel cell of the latter design exhibits exceptional durability and high performance, most notably yielding stable output power (>100 days) without the …
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Synthesis of lithium manganese phosphate by controlled sol-gel method and design of all solid state lithium ion batteries
… due the manganese dissolution in the organic liquid electrolyte due to Jahn-Teller Lattice distortion. This problem was tried to endorse in this thesis. In the second chapter by synthesizing nano sized cathode particles with good electronic conductivity, good performance was achieved. In the …
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MULTILAYER COMPOSITE SOLID ELECTROLYTES FOR LITHIUM ION BATTERIES
… from mobile phones to cars. The conventional liquid electrolytes based LIBs are prone to failure in conditions such as high operating temperature, solvent leakage, lithium dendrites formation and thermal runaway, etc. All-solid-state lithium ion batteries (ASSLIBs) provide a promising power …
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Scalable Synthesis of Solid-State Electrolytes Using Flame-Assisted Spray Pyrolysis
… limits due to the inclusion of a flammable liquid electrolyte. One solution being considered to improve LIB performance is to replace the liquid electrolyte with a non-flammable solid-state electrolyte (SSE), which enables the use of high voltage cathode materials and a lithium metal anode, …
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False optimism for the hydrogen economy and the potential of biofuels and advanced energy storage to reduce domestic greenhouse gas emissions
… advances in photovoltaics, wind power and pumped liquid electrolyte battery technology.
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Effect of Ionic Liquid Electrolytes in DSSCs with Titanium Dioxide (TiO2) Inverse Opal Structures
… improving the efficiency of DSSCs, the current liquid electrolyte cell has plateaued at a conversion efficiency of ~ 12%. A major problem with these cells regarding their applicability is the low viscosity and high volatility of the toxic electrolyte, i.e., acetonitrile, which cause leakage and …
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Microfluidic reactor for the electrochemical reduction of carbon dioxide
… reduction of CO2 that uses a flowing liquid electrolyte. This flowing electrolyte provides enormous flexibility and control over the reaction conditions and enables the use of a reference electrode to study individual electrode performances. These characteristics make the reactor and …
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Alkaline Potassium Polyacrylate Electrolytes for Rechargeable Zinc-Manganese Dioxide Batteries
… friendly, intrinsically safe and low-cost. Liquid electrolytes, such as potassium hydroxide (KOH), are historically used in these batteries; however, many failure mechanisms of the Zn–MnO<sub>2</sub> battery chemistry result from the use of liquid electrolytes, including the formation of …
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Microfabricated thin-film batteries : technology and potential applications
… for these applications most often employ a liquid electrolyte system. However, liquid electrolytes do not allow for small scale and thin-film production as they require hermetic sealing. The aim for batteries in any size or shape, without the restrictions liquid components pose, has led to …
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Design and Characterization of Electrospun Mats with Tailored Morphologies for Enhanced Active Layer Performance in Energy Conversion and Energy Storage Applications
… polymer-ion interaction in polymer-gel electrolytes is demonstrated to result in enhanced battery performance. We demonstrate the ability to develop unique morphologies in Poly(3-hexafluoro propylene) (P3HT) films with energy storage applications using various electrospinning techniques. …
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Microstructural modeling of lithium battery electrodes
… 10 and 13 volume percent conductor loading for liquid electrolyte systems. In dissolved polymer systems, polymer adsorption shifted the percolation threshold to 25 volume percent. Ion transport was analyzed using a computer model designed by Doyle and Newman. Microstructural solutions to …
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Direct measurement of vanadium cross-over in an operating redox flow battery
… in which the storage medium is in the form of liquid electrolyte, which is stored in external reservoirs separate from the cell stack. The storage capacity of such systems is limited by the size of the external tanks, making the RFB an ideal technology for grid level energy storage. The …
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Membraneless hydrogen bromine laminar flow battery for large-scale energy storage
… In this architecture, fluid reactants and electrolyte flow through a small channel at sufficiently low Reynolds number that laminar flow is maintained and the liquid electrolyte acts as a separator between the reactants. Experimental results from a proof of concept cell are presented, and …
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