Kyoto University · 공학
타케시 야마구치 교수의 연구실은 리튬 이온의 전극/전해질 인터페이스에서의 이동 거동과 전도 메커니즘을 중심으로 한 고체 전해질 및 복합 전해질 시스템의 전기화학적 거동을 연구합니다. 주로 아세틱 인피던스 스펙트로스코피를 활용해 리튬 이온 이동 저항과 활성화 에너지를 정량적으로 분석하며, 전해질 용매와의 상호작용이 인터페이스 거동에 미치는 영향을 이론적 계산과 결합해 규명하고자 합니다. 특히 리튬이온 전도성 세라믹스와 폴리머 전해질의 복합체에서의 인터페이스 전도성 향상 전략을 모색하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Solvated lithium-ion transfer at the interface between the graphite and electrolyte was investigated by ac impedance spectroscopy. Electrolytes consisting of 1 mol dissolved in 1,2-dimethoxyethane (DME) and dimethylsulfoxide (DMSO) were used. Cyclic voltammograms of highly oriented pyrolytic graphite in the above electrolytes showed that solvated lithium ion intercalation occurred below a potential of 1.5 V (vs. In 1 mol electrolyte, impedance spectra of graphite were measured at a potential of
In this study, lithium-ion transfer through the electrode/electrolyte interface was examined using a model interface composed of a lithium-ion-conductive ceramic and liquid electrolytes to focus on lithium-ion transfer. Lithium-ion transfer resistances at the interface and their activation energies were evaluated by impedance spectroscopy. The activation energies were quite large and consistent with the interaction between lithium-ion and solvents in an electrolyte as determined by a theoretical
Lithium-ion transfer at the interface between the lithium-ion-conductive ceramic of (LLT) and the polymer electrolyte of polyethylene oxide (PEO) complexed with was studied by ac impedance spectroscopy for the system of The impedance ascribed to ion transfer through the interface was observed. The resistance due to the lithium-ion transfer at the interface was larger than those through phases of LLT and and the temperature dependence of the interfacial resistances showed Arrhenius-type behavior.
