Reliable reference electrodes for lithium-ion batteries

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• 作者：F. La Mantia¹ ; C.D. Wessells ; H.D. Deshazer ; Yi Cui ; ^{yicui@stanford.edu}
• 关键词：Reference electrode ; Lithium-ion batteries ; Polarizability ; High current rate
• 刊名：Electrochemistry Communications
• 出版年：2013
• 出版时间：June, 2013
• 年：2013
• 卷：31
• 期：Complete
• 页码：141-144
• 全文大小：490 K

文摘

Despite the high attention drawn to the lithium-ion batteries by the scientific and industrial community, most of the electrochemical characterization is carried out using poor reference electrodes or even no reference electrode. In this case, the performances of the active material are inaccurate, especially at high current densities. In this work we show the error committed in neglecting the polarizability of lithium counter electrodes, and we propose two reference electrodes to use in organic electrolytes based on lithium salts, namely Li₄Ti₅O₁₂ and LiFePO₄. In particular, it was observed that, the polarizability of the metallic lithium counter electrode has a relevant stochastic component, which renders measurements at high current densities (above 1 mA¡¤cm^? 2) in two electrode cells non reproducible.