Flexible solid-state electrolyte membranes are beneficial for feasible construction of solid-state batteries. In this study, a flexible composite electrolyte was prepared by combining a Li + -ion-conducting solid electrolyte Li 1.5 Al 0.5 Ti 1.5 (PO 4 ) 3 (LATP) and a poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF−HFP) gel containing a highly concentrated electrolyte of Li[N-(SO 2 CF 3 ) 2 ] (LiTFSA)/sulfolane using a solution casting method. We successfully demonstrated the operation of Li/LiCoO 2 cells with the composite electrolyte; however, the rate capability of the cell degraded with increasing LATP content. We investigated the Li-ion transport properties of the composite electrolyte and found that the gel formed a continuous phase in the composite electrolyte and Li-ion conduction mainly occurred in the gel phase. Solid-state 6 Li magic-angle spinning NMR measurements for LATP treated with the 6 LiTFSA/sulfolane electrolyte suggested that the Li + -ion exchange occurred at the interface between LATP and 6 LiTFSA/sulfolane. However, the kinetics of Li + transfer at the interface between LATP and the PVDF−HFP gel was relatively slow. The interfacial resistance of LATP/gel was evaluated to be 67 Ω•cm 2 at 30 °C, and the activation energy for interfacial Li + transfer was 39 kJ mol −1 . The large interfacial resistance caused the less contribution of LATP particles to the Li-ion conduction in the composite electrolyte.
YCrxAl1-xO3 nanoparticles were synthesized by a reverse micelle processing for inorganic pigment. Y(NO3)2·6H2O, Cr (NO3)2·6H2O and Al (NO3)3·9H2O are used for precursors in order to synthesis YCrxAl1-xO3 nanoparticles. The aqueous solution consists of mixing the molar ratio of Y/Cr/Al at 1:x:1-x and heat treated at 900~1300°C for 2h. The average size and distribution of synthesized YCrxAl1-xO3 powders was in the range of 10-20nm and narrow, respectively. The average size of the synthesized YCrxAl1-xO3 powders increased with increasing water to surfactant molar ratio and heating temperature. The crystallinity of synthesized YCrxAl1-xO3 powder increased with increasing heating temperature. The synthesized YCrxAl1-xO3 powders were characterized by X-ray diffraction analysis (XRD), field emission scanning electron microscopy (FE-SEM) and color spectrophotometer. The properties of the synthesized powders were affected by such variables as molar ratio, heating temperature etc.
CeO2 nanoparticles were synthesized through the solvothermal process. It is observed that the water/ethanol mixed solvents were strongly influenced on the agglomeration. The average size of CeO2 nanoparticles was about in the range of 11-13nm and its distribution was narrow. With the increase of the ethanol composition, the surface area of CeO2 was increased from 65.384m2/g to 84.649m2/g. The synthesized nanoparticles components, particle size, morphology and surface area were characterized by EDS, XRD, FE-SEM, FE-TEM and BET.
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