Global ETD Search

1	High Energy Density Battery for Wearable Electronics and Sensors Palanisamy, Asha January 2016 (has links) No description available. Electrical Engineering Lithium sulfur high energy density battery for wearables LAGP S-cathode CNT substrate
2	The development of fibre-reinforced ceramic matrix composites of oxide ceramic electrolyte Marriner-Edwards, Cassian January 2016 (has links) Flammable solvents contained in liquid electrolytes pose a serious safety risk when used in lithium batteries. Oxide ceramic electrolytes are a safer alternative, but suffer from inadequate mechanical properties and ionic conductivity. Thin electrolyte layers resolve the issue of conductance, but accentuate the detrimental mechanical properties of oxide ceramics. The presented work has investigated oxide ceramic electrolyte reinforcement in composite electrolytes for all-solid-state batteries. Fabricating oxide ceramic electrolytes with engineered microstructure enabled development of a reinforced composite. This approach is based on the formation of 3D- porous ceramics via stereolithography printing of polymer templates from designed cubic, gyroid, diamond and bijel architectures. The microstructural parameters of templates were analysed and modified using computational techniques. Infiltration of the prepared 3D-porous electrolyte with polymeric-fibre reinforcement created the reinforced composite electrolyte. The prepared ceramic composite showed excellent reproduction of the template microstructure, good retention of ionic conductivity and enhanced mechanical properties. The final composite was composed of NASICON-type Li<sub>1.6</sub>Al<sub>0.6</sub>Ge<sub>1.4</sub>(PO<sub>4</sub>)<sub>3</sub> oxide ceramic electrolyte and epoxy and aramid fibre reinforcement. The gyroid architecture was computationally determined as having the optimal stress transfer efficiency between two phases. The printed gyroid polymer template gave excellent pore microstructure reproduction in ceramic that had 3D-interconnected porosity, high relative density and the most uniform thickness distribution. The ceramic matrix porosity allowed for complete infiltration of reinforcement by aramid and epoxy forming the fibre-reinforced ceramic matrix composite. The interpenetrating composite microstructure with ceramic and epoxy gave a flexural strength increase of 45.65 MPa compared to the ceramic. Unfortunately, the infiltration procedure of aramid-epoxy reinforcement did not realise the full tensile strength potential of aramid fibres.
3	Effect of Alumina and LAGP Fillers on the Ionic Conductivity of Printed Composite Poly(Ethylene Oxide) Electrolytes for Lithium-Ion Batteries Crisanti, Samuel Nathan, Crisanti 31 May 2018 (has links) No description available. Chemical Engineering Electrical Engineering Energy Materials Science Mechanical Engineering Polymer Chemistry Polymers lithium ion battery electrolyte solid polymer composite LAGP alumina peo litf ionic conductivity printed aerosol jet deposition nanoparticles space charge layer
4	Fabrication and Characterizations of LAGP/PEO Composite Electrolytes for All Solid-State Lithium-Ion Batteries Lee, Jeremy J. 07 June 2018 (has links) No description available. Engineering Energy Materials Science Technology Solid State Physics Alternative Energy Lithium-ion battery solid-state-electrolyte LAGP Mechanical-Testing Elastic-Modulus Ultimate-Strength EIS Conductivity Electrical Thermal PEO LiBF4 LiTFSI Composite

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