Tokyo Institute of Technology · 공학
Manabu Kodama 교수의 연구실은 고성능 고체전지, 특히 모두 고체형 리튬이온이온 배터리(ASLB)의 전극 및 전해질 구조를 고해상도 3차원 이미징과 정밀 분석 기법을 통해 규명하는 데 초점을 맞추고 있습니다. 주로 신크로트론 방사선을 이용한 나노컴퓨터 단층촬영(나노-CT)과 초미세산란(USAXS)을 활용해 전극 내 물질 분포, 나노스케일 공극 구조, 고압 하에서의 입자 거동을 비파괴적으로 관찰합니다. 또한 딥러닝과 시뮬레이션 기법을 접목해 전도도 향상과 이온 이동성 최적화를 위한 전극 설계 원리를 도출하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Three-dimensional measuring method of the material distribution of an all-solid-state lithium-ion battery (ASSLiB) cathode, by synchrotron radiation high-resolution X-ray computational tomography (nanotomography, nano-CT) and deep learning is proposed in this study. The cathode of the ASSLiB comprised materials with high X-ray absorption coefficients, such as LiCoO2 and LiNi0.5Co0.2Mn0.3O2. Such high absorption coefficients imparted difficulties in obtaining a high-resolution, high-contrast imag
Interleukin (IL) 18, a powerful inducer of the immunoregulatory cytokine interferon-gamma (IFN-gamma), presents upstream of the cytokine activation cascade in the inflammatory response. The anti-inflammatory properties of steroids permit their use in various conditions, although effects are transient and pathological states are not fully relieved by short-term steroidal use. We examined the effect of lipopolysaccharide (LPS)/IL-2 on the cytokine cascade in human peripheral blood mononuclear cell
High-pressure in situ X-ray computational tomography measurements of sulfide solid electrolyte were conducted to elucidate the behavior of a single particle. Chlorine in Li6PS5Cl solid electrolyte was replaced by iodine to obtain high-contrast X-ray computational tomography measurements, and the behavior of a single particle under high pressure was successfully visualized. The experimental results were statistically analyzed to extract the generalized behavior of a solid electrolyte particle. Th
High-performance all-solid-state lithium-ion batteries require observation, control, and optimization of the electrode structure. X-ray computational tomography (CT) is an effective nondestructive method for observing the electrode structure in three dimensions. However, the limited availability of synchrotron radiation CT, which offers high-resolution imaging with a high signal-to-noise ratio, makes it difficult to conduct experiments and restricts the use of X-ray CT in battery development. Co
At present, it would be desirable to improve the C-rate values of bulk-type all-solid-state lithium-ion batteries by optimizing the electrode structures. Although simulations are an effective means of determining optimal structures, a high degree of accuracy is required. The present study demonstrates a pseudo-two-dimensional (P2D) method of simulating cathodes providing improved accuracy along with low computational cost and based on actual three-dimensional electrode structures. This method in
Lithium-metal anodes are promising electrodes for fabricating high-capacity all-solid-state batteries; however, lithium dendrite growth during charging limits their applicability. One method to suppress lithium dendrite growth is to insert a carbon interlayer between the solid electrolyte and the lithium-metal anode. There are many potential approaches for inserting a carbon interlayer. The optimal conditions for suppressing lithium dendrite growth and ensuring uniform lithium deposition have no
In a high performance all-solid-state lithium-ion battery (ASSLiB), lithium-ion should be smoothly transported to minimize overpotential. Nanoscale pores in the ASSLiB can inhibit ionic transportation; therefore, the pore structure should be measured and nanoscale pores should be prevented for high performance batteries. In this study, laboratory-scale ultra-small-angle X-ray scattering (USAXS) measurements are proposed to evaluate the nanoscale pores in ASSLiBs. The results measured with the US
An accurate analysis of ion transportation in an all-solid-state battery is crucial to improve and estimate performance. For an all-solid-state battery using sulfide solid electrolytes, coupling the stress and electric field simulations is required because the battery is pressurized, this affects the void space, which then affects ion transportation. In this paper, we propose a new method to analyze the ionic conductivity in a pressurized all-solid-state battery by coupling nonlinear stress anal
Three dimensional magnetohydrodynamic, two-phase flow and electrochemical reaction coupling numerical simulation of alkaline water electrolysis with magnetic field is conducted to estimate and reveal the mechanism of overvoltage suppression with the magnetic field. The numerical results shown that both vertical magnetic field to the electrode and parallel magnetic field to the electrode suppress the overpotential by the mixing of the electrolyte. This mixing is induced by the secondary flow in b
Abstract Three‐dimensional large scale magnetohydrodynamic, two‐phase flow, and electrochemical reaction coupling numerical simulations of alkaline water electrolysis with magnetic field were conducted to elucidate the bubble‐bubble interaction and the influence of that on the overpotential. Numerical results show that the magnetic field enhances the coalesce of bubbles and the bubble size was increased with the increase in the magnetic flux density. Moreover, the magnetic field suppressed the c
