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Effects of Oxide Incorporation into Sulfide Solid Electrolytes and Development of All-Solid-State Lithium-Ion Batteries
Get PDF豊橋技術科学大学博士(工学)doctoral thesi
Characterization of Na2Zn2TeO6 ceramic solid electrolyte densified by hot pressing
Get PDFIn this work, we applied hot pressing (HP) for the densification of Na 2 Zn 2 TeO 6 NZTO at lower temperature than conventional furnace sintering (FS). Calcined NZTO powder w as densified by HP at 700 ºC for 1 hour under uniaxial pressure of 20 and 60 MPa using a graphite mold . By increasing the uni axial pressure to 60 MPa for HP, high relative density above 90 % was obtained. As prepared NZTO by HP showed total (bulk + grain boundary) ionic conductivity of 0.29 mS cm -1 at room temperature, which is lower than NZTO prepare d by FS at 800 ºC (= 0.4 mS cm -1 ) with lower relative density 85 %). It was found that the contribution of grain boundary resistance in as prepared NZTO by HP is larger than NZTO by FS. We confirmed that the grain boundary resistance was significantly reduced by post annealing. Consequently, total conductivity at room temperature was improved to 0.42 mS cm -1 and 0.56 mS cm -1 by annealed at 700 ºC and 800 ºC for 2 hours . X ray photoelectron spectroscopy analysis indicated the 2 residual carbon residual carbon--contained secondary phases were reduced by postcontained secondary phases were reduced by post--annealing. These annealing. These secondary phases could be formed by the carbon contamination from secondary phases could be formed by the carbon contamination from a a graphite graphite moldmold for for HP and their removal by postHP and their removal by post--annealing results into the improvement ionic conduction at annealing results into the improvement ionic conduction at graingrain--boundary.boundary.journal articl
Influence of phase characteristics of input earthquake ground motions and lateral carrying capacity on seismic response and seismic performance of medium-low story buildings
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“The Awakening” Caused by Psychological Forces and the Polysemy of Awake as a Result Phrase
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Development of a label-free bio-image sensor and visualization of chemicals from the hippocampus
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Introduction of halogen-containing functional groups by decarboxylation reaction of carboxylic acids
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Cinchona alkaloid derivatives and their polymers as efficient catalysts for asymmetric reaction
No full text豊橋技術科学大学博士(工学)doctoral thesi
