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首页> 外文会议>Meeting of the Electrochemical Society >Effect of Composition and Temperature on Current Efficiency for Aluminium Electrolysis from Cryolite-Based Molten Alumina Electrolytes
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Effect of Composition and Temperature on Current Efficiency for Aluminium Electrolysis from Cryolite-Based Molten Alumina Electrolytes

机译：组合物与温度对碳电解铝电解铝电解电流效率的影响

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摘要

The current efficiency (CE) for aluminium electrolysis in modern cells can be as high as 96%. The main reason for loss in current efficiency is the so-called back reaction between dissolved metal and the anode product of CO_2. Decreasing temperature of the cell may give higher current efficiency. However, low superheat may cause solidification of melt. A laboratory cell to determine the current efficiency was recently modified to obtain more reliable results. Electrolysis was performed at constant current density and the current efficiency was determined from the weight of deposited aluminium. Effects of electrolyte composition by addition of LiF and temperature were studied. The loss in current efficiency is strongly related to the content of dissolved metal in the electrolyte. The effect of LiF addition on the current efficiency was discussed in this study.
机译：现代电池中铝电解的电流效率（CE）可以高达96％。电流效率损失的主要原因是溶解金属与CO_2的阳极产品之间的所谓反应。电池的降低温度可提供更高的电流效率。然而，低过热可能会导致熔体凝固。最近修改了确定当前效率的实验室细胞以获得更可靠的结果。在恒定电流密度下进行电解，并从沉积铝的重量确定电流效率。研究了电解质组合物通过添加生命和温度的影响。当前效率的损失与电解质中溶解金属的含量密切相关。本研究讨论了生命添加对电流效率的影响。

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