77 citations · 285 across the 9 of their papers we have counts for
9 papers
Revealing the formation and electrochemical properties of bis(trifluoromethanesulfonyl) imide intercalated graphite with first-principles calculations
Chol-Jun Yu, Un-Song Ri, Gum-Chol Ri +1
Graphite has been reported to have anion as well as cation intercalation capacities as both cathode and anode host materials for the dual ion battery. In this work, we study the in…
Role of Water Molecule in Enhancing the Proton Conductivity on Graphene Oxide at Humidity Condition
Gum-Chol Ri, Jin-Song Kim, Chol-Jun Yu
Recent experimental reports on in-plane proton conduction in reduced graphene oxide (rGO) films open a new way for the design of proton exchange membrane essential in fuel cells an…
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…
Revealing the stability and efficiency enhancement in mixed halide perovskites MAPb(ICl) with ab initio calculations
Un-Gi Jong, Chol-Jun Yu, Yong-Man Jang +3
A little addition of Cl to \ce{MAPbI3} has been reported to improve the material stability as well as light harvesting and carrier conducting properties of organometal trihalide pe…
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…
Ab initio thermodynamic study of SnO(110) surface in an O and NO environment: a fundamental understanding of gas sensing mechanism for NO and NO
Chol-Jun Yu, Yun-Hyok Kye, Song-Nam Hong +5
For the purpose of elucidating the gas sensing mechanism of SnO for NO and NO gases, we calculate the phase diagram of SnO(110) surface in contact with an O and NO…
First-principles study of ternary graphite compounds cointercalated with alkali atoms (Li, Na, and K) and alkylamines towards alkali ion battery applications
Gum-Chol Ri, Chol-Jun Yu, Jin-Song Kim +3
Using density functional theory calculations, we have investigated the structural, energetic, and electronic properties of ternary graphite intercalation compounds (GICs) containin…
Electronic structure and photo absorption property of pseudo-cubic perovskites CHNHPbX (X=I, Br) including van der Waals interaction
Chol-Jun Yu, Un-Gi Jong, Mun-Hyok Ri +1
Using density functional theory with the inclusion of van der Waals (vdW) interaction, we have investigated electronic energy bands, density of states, effective masses of charge c…