36 citations · 88 across the 10 of their papers we have counts for
10 papers
Influence of Ti/V Cation-Exchange in NaTiO on Na-Ion Negative Electrode Performance: an Insight from First-Principles Study
Chol-Jun Yu, Suk-Gyong Hwang, Yong-Chol Pak +3
Sodium-titanate \ce{Na2Ti3O7} (NTO) is regarded as a highly promising anode material with a very low voltage for Na-ion batteries and capacitors, but suffered from relatively low s…
First-principles study on luminescence properties of Eu-doped defect pyrochlore oxide KNbWOHO:Eu
Song-Hyok Choe, Chol-Jun Yu, Myong Choe +3
Defect pyrochlore oxides have attracted a great interest as promising luminescent materials due to their flexible composition and high electron/hole mobility. In this work, we inve…
Interface Engineering in Hybrid Iodide CH3NH3PbI3 Perovskite Using Lewis Base and Graphene towards High Performance Solar Cells
Chol-Jun Yu, Yun-Hyok Kye, Un-Gi Jong +6
Perovskite solar cells have achieved a substantial breakthrough via advanced interface engineerings. Reports have emphasized that combining the hybrid perovskites with Lewis base a…
First-Principles Study on NaxTiO2 with Trigonal Bipyramid Structures: An Insight into Sodium-Ion Battery Anode Application
Song-Hyok Choe, Chol-Jun Yu, Kum-Chol Ri +4
Developing efficient anode materials with low electrode voltage, high specific capacity and superior rate capability is urgently required on the road to commercially viable sodium-…
Two-dimensional hybrid composites of SnS2 with graphene and graphene oxide for improving sodium storage: A first-principles study
Kum-Chol Ri, Chol-Jun Yu, Jin-Song Kim +1
Among the recent achievements of sodium-ion battery (SIB) electrode materials, hybridization of two-dimentional (2D) materials is one of the most interesting appointments. In this…
The maximum interbubble distance in relation to the radius of spherical stable nanobubble in liquid water: A molecular dynamics study
Song-Nam Hong, Song-Hyok Choe, Un-Gi Jong +2
The mechanism of superstability of nanobubbles in liquid confirmed by many experimental studies is still in debate since the classical diffusion predicts their lifetime on the orde…
Mixed eldfellite compounds \ce{Na(Fe_{1/2}M_{1/2})(SO4)2} (M = Mn, Co, Ni): A new family of high electrode potential cathodes for the sodium-ion battery
Gum-Chol Ri, Song-Hyok Choe, Chol-Jun Yu
Natural abundance of sodium and its similar behavior to lithium triggered recent extensive studies of cost-effective sodium-ion batteries (SIBs) for large-scale energy storage syst…
Ab initio study of sodium cointercalation with diglyme molecule into graphite
Chol-Jun Yu, Song-Bok Ri, Song-Hyok Choe +3
The cointercalation of sodium with the solvent organic molecule into graphite can resolve difficulty of forming the stage-I Na-graphite intercalation compound, which is a predomina…
Ionic Diffusion and Electronic Transport in Eldfellite NaFe(SO)
Chol-Jun Yu, Song-Hyok Choe, Gum-Chol Ri +3
Discovering new electrodes for sodium-ion battery requires clear understanding of the material process during battery operation. Using first-principles calculations, we identify me…
First-principles study of organically modified muscovite mica with ammonium (NH) or methylammonium (CHNH) ion
Chol-Jun Yu, Song-Hyok Choe, Yong-Man Jang +2
Using density functional theory calculations, we have investigated the interlayer cation exchange phenomena in muscovite mica, which is motivated by a necessity to develop flexible…