김병헌 교수

Abstract O2-type lithium-rich layered oxides, known for mitigating irreversible transition metal migration and voltage decay, provide suitable framework for exploring the inherent properties of oxygen redox. Here, we present a series of O2-type lithium-rich layered oxides exhibiting minimal structural disordering and stable voltage retention even with high anionic redox participation based on the nominal composition. Notably, we observe a distinct asymmetric lattice breathing phenomenon within t

Dependency of lithium diffusion kinetics on the site energy variations in DRX. In DRX, lithium ions occupying larger-volume octahedral sites exhibit more unstable site energies. This instability serves as an activation barrier.

Despite the potential to increase the energy limit of Li-rich cathodes by using oxygen redox, its practicality has been limited by the accompanying structural changes and voltage hysteresis. While voltage hysteresis is commonly associated with transition metal (TM) migration and oxygen dimerization, the specific contribution of each is unclear. We provide a mechanistic insight into how each of these changes induces hysteresis in a representative Li-rich disordered rocksalt cathode, Li 1.2 Mn 0.4

본 연구에서는 엘라스머(Elasmar, 2003)의 수입미디어에 대한 감수성 모형(the model of susceptibility to imported media)을 이용하여, 중국드라마를 대상으로 영상물 제작국에 대한 사전지식과 태도가 드라마 시청에 미치는 영향에 대해 분석하였다. 실제 시청자의 시청 선택을 분석하고자 마니아층이라 할 수 있는 중국드라마 인터넷 동호회 회원들에 대한 설문조사를 실시하였다. 분석 결과, 첫째, 중국드라마의 시청동기는 요인분석을 통해 배우/이야기 매력, 중국에 대한 호기심, 습관적 시청, 볼거리 등 4가지 동기로 요약되었다. 둘째, 시청자가 중국에 대해 가지고 있는 사전지식 및 태도의 일부 변수(중국어 이해도, 중국에 대한태도, 중화권 콘텐츠 경험, 중국 콘텐츠(전통)에 대한 태도)은 중국드라마의 시청동기에 영향을 미쳤다. 셋째, 시청자가 중국에 대해 가지고 있는 사전지식의 일부 변수(중화권 콘텐츠 경험) 및 시청동기(배우 이야기 매력)가 중국드라마

Advancing liquid electrolyte design is crucial for overcoming the performance limitations of current battery technologies and enabling next-generation energy storage systems. Among recent developments, localized high-concentration electrolytes (LHCEs) have demonstrated remarkable cycling stability. However, their reliance on fluorinated diluents, which are highly reactive with lithium metal, inevitably leads to severe spontaneous corrosion. This study introduces a fluorine-free, corrosion-resist

Lithium-rich cathodes are regarded as promising energy storage materials due to their high energy densities. However, voltage hysteresis presents challenges to maximizing their energy efficiency and practical implementation. Voltage hysteresis has generally been associated with transition metal migration and oxygen dimer formation within the structure. To understand the contribution of specific structural disorder to voltage hysteresis, one needs to consider the kinetics of the formation and rec

Enhanced Stability in Lithium Metal Batteries The artwork illustrates a benzene shielding battery systems from degradation. The surrounding sea and waves represent the electrolyte and lithium corrosion reactions. By blocking these corrosive elements, the benzene barrier ensures the battery's structural integrity and long-term stability, highlighting a robust defense mechanism for energy storage architectures even under highly corrosive environments. More details can be found in the Research Arti