A5049160792- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Extraction and Separation Processes
- Semiconductor materials and devices
- Fuel Cells and Related Materials
- Supercapacitor Materials and Fabrication
- Advancements in Solid Oxide Fuel Cells
- Advanced Computational Techniques and Applications
- Chemical Looping and Thermochemical Processes
- Coordination Chemistry and Organometallics
- Advanced battery technologies research
- Ferroelectric and Piezoelectric Materials
- Nanoporous metals and alloys
- Traffic Prediction and Management Techniques
- Asymmetric Synthesis and Catalysis
- Graphene research and applications
- Electron and X-Ray Spectroscopy Techniques
- Advanced Decision-Making Techniques
- Asymmetric Hydrogenation and Catalysis
- Semiconductor materials and interfaces
Ulsan National Institute of Science and Technology
2017-2023
Hyundai Motors (South Korea)
2021-2023
Myongji University
2023
Conventional nickel-rich cathode materials suffer from reaction heterogeneity during electrochemical cycling particularly at high temperature, because of their polycrystalline properties and secondary particle morphology. Despite intensive research on the morphological evolution materials, its practical investigation electrode cell levels is still rarely discussed. Herein, an intrinsic limitation in high-energy full-cells discovered under industrial electrode-fabrication conditions. Owing to...
Abstract Lithium-excess 3 d -transition-metal layered oxides (Li 1+ x Ni y Co z Mn 1− − O 2 , >250 mAh g −1 ) suffer from severe voltage decay upon cycling, which decreases energy density and hinders further research development. Nevertheless, the lack of understanding on chemical structural uniqueness material prevents interpretation internal degradation chemistry. Here, we discover a fundamental reason phenomenon by comparing ordered cation-disordered materials with combination X-ray...
Abstract A practical solution is presented to increase the stability of 4.45 V LiCoO 2 via high‐temperature Ni doping, without adding any extra synthesis step or cost. How a putative uniform bulk doping with highly soluble elements can profoundly modify surface chemistry and structural identified from systematic chemical microstructural analyses. This modification has an electronic origin, where surface‐oxygen‐loss induced Co reduction that favors tetrahedral site causes damaging spinel...
A high-energy nickel-rich cathode with primary particle concentration gradient is developed via a simple, one-step process involving sacrificial polymeric-bead cluster. The particles' gradients and internal buffer space in the secondary particles are successfully formed without any surface coating reagents. It demonstrated that material has high specific capacity thermal stability. As service to our authors readers, this journal provides supporting information supplied by authors. Such...
Li- and Mn-rich layered oxides (LMRs) have emerged as practically feasible cathode materials for high-energy-density Li-ion batteries due to their extra anionic redox behavior market competitiveness. However, sluggish kinetics regions (<3.5 V vs Li/Li+ ) associated with chemistry engender LMRs chemical irreversibility (first-cycle irreversibility, poor rate properties, voltage fading), which limits practical use. Herein, the structural origin of this is revealed through a comparative study...
Abstract In recent years, Li‐ and Mn‐rich layered oxides (LMRs) have been vigorously explored as promising cathodes for next‐generation, Li‐ion batteries due to their high specific energy. Nevertheless, actual implementation is still far from a reality since the trade‐off relationship between particle size chemical reversibility prevents LMRs achieving satisfactory, industrial energy density. To solve this material dilemma, herein, novel morphological structural design introduced Li 1.11 Mn...
Abstract Li‐excess 3d‐transition metal layered oxides are promising candidates in high‐energy‐density cathode materials for improving the mileage of electric vehicles. However, their low rate capability has hindered practical application. The lack understanding about redox reactions and migration behavior at high C‐rates make it difficult to design with capability. In this study, characteristics atomic that is predominant fast charge/discharge investigated by comparing cation‐ordered...
A systematic analysis of the calendar aging behavior 700 mA h full-cell with nickel-rich LiNi 0.88 Co 0.1 Al 0.02 O under 45 °C and 60 for 30 weeks.
In article number 1602559, Minjoon Park, Jaephil Cho, and co-workers report a new porous nickel-rich cathode material with self-induced transition metals concentration gradient developed by poly-styrene bead (PSB) clusters incorporated co-precipitation method without an additional coating process. The PSB exhibits not only excellent electrochemical performance at high temperature even cut-off voltage, but also superior structural integrity after tests. These results can effectively...
Li- and Mn-rich layered oxides (LMR) come into the spotlight due to anomalously high capacities under O redox. However, redox also incurs undesirable situations: voltage fade, inhomogeneous kinetics low coulombic efficiency, limiting a practical use. Herein, through comparative study on LMR (Li 1.15 Mn 0.51 Co 0.17 Ni 2 ) having different distributions of redox-active oxygen in structural arrangement, we reveal origin irreversible properties LMR, which appear mainly at region (LVRR, ~3.0V)....
Intrinsic problems for nickel-based cathodes under high temperature is challenging expansion their application to electric vehicles (EVs), and stationary energy storages. While majority of the research focuses on improving performances degradation mechanisms long-term cycling, relatively less studies are published regarding storage conditions. Here, we discuss a high-temperature behavior Ni-rich cathode using systematic protocols with high-energy lithium-ion cell. Although, final capacity...