Abstract

The presence of dimethylacetamide (DMAA) in the composition of electrolytes of a sodium-ion battery destroys the passive film on electrodes and results in a number of reactions not connected with the electrochemical process that must be considered in developing such batteries. Introducing DMAA into the composition of a battery electrolyte greatly improves the conductivity of the polymeric membrane that separates the cathode and anode spaces. However, it is established that in the presence of sodium metal, anhydrous DMAA undergoes Claisen-like self-condensation with subsequent reactions. IR spectroscopy is used to explain the causes of the electrochemical instability of sodium perchlorate solutions in mixed solvents containing DMAA.

中文翻译：

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钠和二甲基乙酰胺之间的相互作用是钠离子电池运行不稳定的原因

摘要

钠离子电池电解质组合物中二甲基乙酰胺（DMAA）的存在会破坏电极上的钝化膜，并导致许多与电化学过程无关的反应，因此开发此类电池时必须考虑这些反应。将DMAA引入电池电解质的组成中可极大地改善分隔阴极和阳极空间的聚合物膜的电导率。然而，已经确定在钠金属的存在下，无水DMAA经历了克莱森样的自缩合并随后发生反应。红外光谱用于解释在含DMAA的混合溶剂中高氯酸钠溶液电化学不稳定的原因。