Kang, Stephen Dongmin Kuo, Jimmy Jiahong Kapate, Nidhi Hong, Jihyun Park, Joonsuk Chueh, William C. 2024-01-19T13:04:29Z 2024-01-19T13:04:29Z 2022-01-10 2021-12 0013-4651 https://pubs.kist.re.kr/handle/201004/116017 Following a critical review of the galvanostatic intermittent titration technique in Part I, here we experimentally demonstrate how to extract chemical diffusivity with a modified method. We prepare dense bulk samples that ensure diffusion-limitation. We utilize the scaling with root t(relax) + tau - root t(relax )( t(relax): relaxation time; T: pulse duration), avoiding problems with composition-dependent overpotentials. The equilibrium Nernst voltage is measured separately using small porous particles. This separation between the diffusion measurement and the titration procedure is critical for performing each measurement in a reliable setting. We report the chemical diffusion coefficients of LixNi1/3Mn1/3Co1/3O2 and their activation energy. We extract ionic conductivity and compare it with total conductivity to confirm ion-limitation in chemical diffusion. The measurements suggest that the time scale for diffusion in typical Li-ion battery particles could be much shorter than that of the intercalation/deintercalation processes at the particle surface (Biot number less than 0.1). (C) 2021 The Author(s). Published on behalf of The Electrochemical Society by IOP Publishing Limited. English Electrochemical Society, Inc. Galvanostatic Intermittent Titration Technique Reinvented: Part II. Experiments Article 10.1149/1945-7111/ac3939 1 Journal of the Electrochemical Society, v.168, no.12 Journal of the Electrochemical Society 168 12 Y scie scopus 000727012800001 2-s2.0-85122614213 Electrochemistry Materials Science, Coatings & Films Electrochemistry Materials Science Article ELECTRODE POWDER COMPACTS BOUNDED DIFFUSION CATHODE MATERIALS IONIC TRANSPORT LI PERFORMANCE IMPEDANCE KINETICS Batteries 리튬이온전지