| 학회 | 한국화학공학회 |
| 학술대회 | 2022년 봄 (04/20 ~ 04/23, 제주국제컨벤션센터) |
| 권호 | 28권 1호, p.461 |
| 발표분야 | [주제 8] 에너지 저장 |
| 제목 | Inhomogeneous reaction kinetics of layered oxide cathode in lithium-ion batteries: reaction-limited vs. diffusion-limited |
| 초록 | This presentation, I will show that the apparent phase separation is a dynamical artefact occurring in a many-particle system driven by autocatalytic electrochemical reactions, that is, an interfacial exchange current that increases with the extent of delithiation. I experimentally validate this population-dynamics model using the single-phase material Lix(Ni1/3Mn1/3Co1/3)O2 (0.5 < x < 1) and demonstrate generality with other transition-metal compositions. Operando diffraction and nanoscale oxidation-state mapping unambiguously prove that this fictitious phase separation is a repeatable non-equilibrium effect. I quantitatively confirm the theory with multiple-datastream-driven model extraction. More generally, our study experimentally demonstrates the control of ensemble stability by electro-autocatalysis, highlighting the importance of population dynamics in battery electrodes (even non-phase-separating ones). # keywords: Particle by particle reaction, reaction limited system, diffusion limited system, layered oxide, cathode, lithium-ion battery, Particle by particle reaction, reaction limited system, diffusion limited system, layered oxide, cathode, lithium-ion battery |
| 저자 | 박정진 |
| 소속 | 한국과학기술(연) |
| 키워드 | 에너지 환경(Energy and Environment) |
| 원문파일 | 초록 보기 |
