阴极
阳极
锂(药物)
电极
电解质
介电谱
电化学
材料科学
分析化学(期刊)
化学
光电子学
医学
色谱法
内分泌学
物理化学
作者
Seong Jin An,Jianlin Li,Claus Daniel,Sergiy Kalnaus,David L. Wood
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2017-01-01
卷期号:164 (7): A1755-A1764
被引量:63
摘要
Simple three-electrode pouch cells which can be used in distinguishing the voltage and resistance in individual electrodes of lithium ion batteries have been designed. Baseline (1 mm-staggered alignment, cathode away from a reference electrode) and aligned electrodes to a reference electrode located outside of the anode and cathode were studied to see alignment effects on resistance analysis. Cells composed of A12 graphite anodes, LiNi0.5Mn0.3Co0.2O2 (NMC 532 or NCM 523) cathodes, lithium foil references, microporous tri-layer membranes, and electrolytes, were cycled with cathode cutoff voltages between 3.0 V and 4.3 V for formation cycles or 4.6 V for C-rate performance testing. By applying a hybrid pulse power characterization (HPPC) technique to the cells, resistances of the baseline cells contributed by the anode and cathode were found to be different from those of the aligned cells, although overall resistances were close to ones from aligned cells. Resistances obtained via electrochemical impedance spectroscopy (EIS) and 2D simulation were also compared with those obtained from HPPC.
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