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Articles by Jongsoon Kim
High-energy O3-Na1-2xCax[Ni0.5Mn0.5]O2 cathode for long-life sodium-ion batteries
High-energy O3-Na1-2xCax[Ni0.5Mn0.5]O2 cathode for long-life sodium-ion batteries To facilitate the practical realization of sodium-ion batteries, the energy density, determined by the output operating volt-age and/or capacity, needs to be improved to the level of commercial Li-ion batteries.
New P2-type layered oxide cathode with superior full-cell performances for K-ion battery
New P2-type layered oxide cathode with superior full-cell performances for K-ion battery The K-ion battery (KIB) has attracted considerable attention as a potential alternative to the Li-ion battery because of its low cost and high energy density. However, its development and durability have been severely limited by the lack of suitable cathodes with high capacity and good cycle life.
Nb-doped titanium phosphate for sodium storage: electrochemical performance and structural insights
Nb-doped titanium phosphate for sodium storage: electrochemical performance and structural insights The effect of Nb5+ doping on the electrochemical and structural characteristics of NaTi2(PO4)3 was investigated. The Nb5+ substitution lowered the band gap energy from 2.8 to 1.4 eV according to density functional theory calculations.
Correction: Development of P3-K0.69CrO2 as an ultra-high-performance cathode material for K-ion batteries
* Corresponding authors a Department of Energy Engineering, Hanyang University, Seoul 04763, South Korea E-mail: yksun@hanyang.ac.kr b Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 05006, South Korea
Role of Mn substituent in Na3V2(PO4)3 for high-rate sodium storage
Mn-doped Na3V2−xMnx(PO4)3 (x = 0, 0.1) cathode materials, which allow extraction of 2 mol of Na from the formula unit, were synthesized, and the effect of doping was investigated. A large discharge capacity of 114 mAh g−1, approaching 96.6% of the theoretical capacity, was attained, which was theoretically activated by the V3+/4+ redox reaction. Structural investigation was performed using Rietveld refinement of X-ray diffraction data and X-ray absorption near-edge structure analysis.
Development of P3-K0.69CrO2 as an ultra-high-performance cathode material for K-ion batteries
Potassium-ion batteries (KIBs) are emerging as a promising energy storage technology because of their low cost and high energy density. However, the large size of K ions hinders the reversible electrochemical potassium (de)insertion in the host structure, limiting the selection of suitable electrode materials for KIBs. Herein, we designed and exploited a new layered oxide, P3-type K CrO (hereafter denoted as P3-K CrO ), as a high-performance cathode for KIBs for the first time.
Spontaneous hybrids of graphene and carbon nanotube arrays at the liquid-gas interface for Li-ion battery anodes
H. Kim, J. Kim, H. Jeong, H. Kim, H. Lee, J. Ha, S. Choi, T. Kim, Y. Nah, T. J. Shin, J. Bang, S. Satija and J. Koo, Chem. Commun., 2018, Accepted Manuscript , DOI: 10.1039/C8CC02148A If you are not the author of this article and you wish to reproduce material from it in a third party non-RSC publication you must formally request permission using RightsLink. Go to our Instructions for using RightsLink page for details.
Tailoring a novel cathode material with extremely high power and long cyclability for application of Na-ion batteries in real-life
We report Na2Fe1.96V0.96(PO4)3 (NFVP) as a new cathode material for Na ion batteries with outstanding cycle life and high power density for the first time. Structural characterization of NFVP was performed using Rietveld refinement of X-ray diffraction and neutron diffraction patterns, which revealed large Na diffusion paths in the structure that enable fast Na (de)intercalation without large volume change.
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