早稲田大学 · 공학
Tetsuya Ōsaka 교수의 연구실은 리튬이온이온 배터리의 진단 및 안정성 평가를 핵심으로 하며, 전기화학적 임피던스 분석(EIS)을 활용한 배터리 수명 예측 및 고장 징후 진단 기술을 개발하고 있습니다. 또한, 비록금속 촉매, 고성능 전기화학적 축전기(EDLC) 및 전기 도금을 통한 자기재료 개발을 통해 에너지 저장 소재의 효율성과 안전성을 동시에 향상시키는 데 주력하고 있습니다. 특히, 실시간 X-선 영상 기반 내부 단서 검출 기술을 통해 배터리의 안전성 테스트를 혁신적으로 개선하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Electrochemical impedance spectroscopy (EIS) can be utilized to characterize battery features, because it allows the dynamics of each elemental process of the battery reaction to be sensitively and separately determined without destruction of the cell. In addition, EIS is expected to be utilized for premonitory diagnosis of onboard batteries in electric vehicles. Here, an overview of the recent diagnosis technologies for determining the health of commercial lithium-ion batteries (LIB) using EIS
Nitrogen doped carbon nanocapsules (NCNCs) were synthesized as a non-noble electrocatalyst for the ORR using a simple and efficient route. The NCNCs exhibited higher activity than the commercial Pt/C catalyst, excellent stability, and resistance to methanol oxidation in the oxygen reduction reaction.
An electric double layer capacitor (EDLC) was prepared with an activated carbon powder electrode with poly(vinylidene fluoridehexafluoropropylene) (PVdF‐HFP) based gel electrolyte. Ethylene carbonate (EC) and propylene carbonate (PC) were used as plasticizer and tetraethylammonium tetrafluoroborate was used as thesupporting electrolyte. An optimized gel electrolyte of mass ratio exhibited high ionic conductivity of , high electrode capacitance, and good mechanical strength. An electrode consisti
During the course of our recent work performed to develop an electroplated CoNiFe ternary alloy with high saturation magnetic flux density and low coercivity for use in magnetic recording heads, it was observed that two common sulfur‐containing additives, saccharin and thiourea, behave differently with respect to the dependence of sulfur inclusion and coercivity of the alloy film on the additive concentration in the plating bath. To understand the cause of this difference, scanning tunneling mic
