A5043411929- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Advanced battery technologies research
- Supercapacitor Materials and Fabrication
- Advanced Battery Technologies Research
- Extraction and Separation Processes
- Chemical Synthesis and Characterization
- Alzheimer's disease research and treatments
- Trace Elements in Health
- Cell death mechanisms and regulation
Seoul National University
2017-2023
Government of the Republic of Korea
2017
Seoul Institute
2017
Ulsan National Institute of Science and Technology
2013-2014
Boise State University
2006
Na-ion batteries are an attractive alternative to Li-ion for large-scale energy storage systems because of their low cost and the abundant Na resources. This Review provides a comprehensive overview selected anode materials with high reversible capacities that can increase density batteries. Moreover, we discuss reaction failure mechanisms those view suggesting promising strategies improving electrochemical performance.
Abstract Mild‐acid Zn‐MnO 2 batteries have been considered a promising alternative to Li‐ion for large scale energy storage systems because of their high safety. There remarkable improvements in the electrochemical performance batteries, although reaction mechanism MnO cathode is not fully understood and still remains controversial. Herein, reversible dissolution/deposition (Mn 2+ /Mn 4+ ) through 2e − directly evidenced using solution‐based analyses, including electron spin resonance...
Abstract A new polyanion‐based compound, Na 3.12 M 2.44 (P 2 O 7 ) (M = Fe, Fe 0.5 Mn , Mn) is synthesized and examined as a cathode for ion batteries. Off‐stoichiometric synthesis induces the formation of Na‐rich phase, 3.32 2.34 ‐ member solid solution series 4‐α 2+α/2 (2/3 ≤ α 7/8) which delivers reversible capacity about 85 mA h g −1 at ca. 3 V vs. Na/Na + exhibits very stable cycle performance. Above all, it shows fast kinetics ions, delivering an almost constant 72% rates between C/10...
We clarified the failure mechanism of Li–O<sub>2</sub>batteries with a redox mediator.
Abstract The activity of lithium ions in electrolytes depends on their solvation structures. However, the understanding changes Li + is still elusive terms interactions between and solvent molecules. Herein, chelating effect ion by forming [Li(15C5)] gives rise to a decrease activity, leading negative potential shift metal anode. Moreover, weakly solvating ionic liquids, such as [Li(TFSI) 2 ] − (TFSI = bis(trifluoromethanesulfonyl)imide), increase resulting positive LiFePO 4 cathode. This...
Two types of sodium cobalt pyrophosphates, triclinic Na3.12Co2.44(P2O7)2 and orthorhombic Na2CoP2O7, are compared as high-voltage cathode materials for Na-ion batteries. Na2CoP2O7 shows no electrochemical activity, delivering negligible capacity. In contrast, exhibits good performance, such high redox potential at ca. 4.3 V (vs. Na/Na+) stable capacity retention over 50 cycles, although delivered approximately 40 mA h gâ1. This is attributed to the fact that (~3.1 Ã ) has smaller diffusion...
Sodium-ion batteries are an attractive alternative to replace Lithium-ion and Ni–metal hydride for electric vehicle smart grid applications. Kyu Tae Lee, Linda F. Nazar, co-workers demonstrate on page 770, the first time, synthesis of new polyanion-based compounds, Na3.12M2.44(P2O7)2 (M=Fe, Fe0.5Mn0.5, Mn), their electrochemical performance as a cathode material Na ion batteries. The deliberate off-stoichiometric phase, Na3.42Fe2.44(P2O7)2.05 shows excellent cycle rate performance, this is...
<p>Vanadium redox flow batteries (VRFBs) have been considered one of promising power sources for large scale energy storage systems (ESS) because their excellent cycle performance and good safety. However, VRFBs still a few challenging issues, such as poor Coulombic efficiency due to vanadium crossover between catholyte anolyte, although recent efforts shown promise in electrochemical performance. Herein, the complexes with various glyme ligands examined active materials suppress thus...
Abstract Review: [40 refs.
Mild-acid Zn-MnO2 batteries have emerged as a promising alternative to replace Li-ion in large-scale energy storage systems, primarily due their high safety and low cost. While there been significant improvements the electrochemical performance of batteries, reaction mechanism MnO2 cathode is not fully comprehended. Despite ongoing debate regarding MnO2, it noteworthy that reversible formation dissolution zinc hydroxysulfates (ZHS) unequivocally observed during cycling. Nevertheless,...