ABSTRACT
Advancing the atomistic level understanding of aqueous dissolution of multicomponent materials is essential. We combined ReaxFF and experiments to investigate the dissolution at the Li1+xAlxTi2-x(PO4)3-water interface. We demonstrate that surface dissolution is a sequentially dynamic process. The phosphate dissolution destabilizes the NASICON structure, which triggers a titanium-rich secondary phase formation.
ABSTRACT
A Na-ion solid-state electrolyte, Na3 P0.62 As0.38 S4 , is developed with an exceptionally high conductivity of 1.46 mS cm-1 at 25 °C and enhanced moisture stability. Dual effects of alloying element As (lattice expansion and a weaker AsS bond strength) are responsible for the superior conductivity. Improved moisture stability is regulated by shifting low-energy moisture reactions to high-energy ones due to As.
ABSTRACT
This paper investigates the determinants of the relationship among Korean outbound tourism demand for Jeju Island and three other Asian island countries using the multivariate generalized autoregressive conditional heteroskedasticity (MGARCH) and Vector Error Correction (VEC) models. It is found that pairwise conditional correlations among tourism demand for Jeju, Thailand, Singapore and the Philippines are not constant but time-varying. Estimated conditional correlations among Jeju and the three Asian countries are negative over some time periods. This implies that the three Asian countries are substitutes for Jeju in certain specific time horizons. The VEC model is used to investigate the short-run and long-run dynamic relationships and the results reveal that Industrial Production Index and real exchange rates had the positive or negative impact on conditional correlations of tourism demand for these destinations. Tourism policy implications are discussed for managing tourism demand for these destinations.