A5014957710- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Extraction and Separation Processes
- Graphene research and applications
- Catalytic Processes in Materials Science
Institute for Basic Science
2017-2020
Seoul National University
2017-2020
Sodium-ion batteries (SIBs) have attracted enormous attention in recent years due to the high abundance and low cost of sodium. However, contrast lithium-ion batteries, conventional graphite is unsuitable for SIB anodes because it much more difficult intercolate larger Na ions into layers. Therefore, critical develop new anode materials SIBs practical use. Here, heteroatom-doped graphene with doping levels disordered structures prepared using a simple economical thermal process. The...
Although sodium ion batteries (NIBs) have gained wide interest, their poor energy density poses a serious challenge for practical applications. Therefore, high-energy-density cathode materials are required NIBs to enable the utilization of large amount reversible Na ions. This study presents P2-type Na0.67Co1–xTixO2 (x < 0.2) with an extended potential range higher than 4.4 V present high specific capacity 166 mAh g–1. A group cathodes containing various amounts Ti is prepared using facile...
A breakthrough utilizing an anionic redox reaction (O
Integrated with heat-generating devices, a Li-ion battery (LIB) often operates at 20-40 °C higher than the ordinary working temperature. Although macroscopic investigation of thermal contribution has shown significant reduction in LIB performance, molecular level structural and chemical origin aging mild environment not been elucidated. On basis combined experiments electrochemical measurements, Cs-corrected electron microscopy, situ analyses, we herein provide operando insights on how...
Sodium‐ion batteries (NIBs) are promising alternatives to lithium‐ion for large‐scale energy applications such as storage systems, owing the earth‐abundance and low cost of sodium resources. Among layered oxide cathode materials NIBs, O3‐type NaCrO 2 has attracted considerable attention its electrochemically active Cr 3+/4+ , which is unlike that LiCrO potential carbon coating with a high thermal stability. In this study, we propose new facile eco‐friendly method applying nitrogen‐doped...
Sodium ion batteries (NIBs) have attracted much attention as promising alternatives of lithium (LIBs) for large scale energy storage systems. This is because sodium cheap and abundant throughout the world contrary to lithium. However, low gravimetric/volumetric density NIBs hinders its practical use. For layered oxide, Na + /vacancy ordering appears at certain concentration, which caused by minimization electrostatic interactions between cations. leads first-order transition that acts...
Sodium-ion batteries (NIBs) for large power sources having kWh or MWh scale of energy are highly interesting alternatives lithium-ion because abundant sodium resources in the earth and high chemical similarity between Li Na ions. However, due to atomic weight + low working potential NIBs, densities NIBs also required be improved wide applications. Despite similar behavior ions rechargeable batteries, performance active material is an essential research- topic realization NIBs. Especially,...