A Critical Evaluation of the Effect of Electrode Thickness and Side Reactions on Electrolytes for Aluminum-Sulfur Batteries.,ChemSusChem

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A Critical Evaluation of the Effect of Electrode Thickness and Side Reactions on Electrolytes for Aluminum-Sulfur Batteries.
ChemSusChem ( IF 7.5 ) Pub Date : 2020-04-17 , DOI: 10.1002/cssc.202000447
John Lampkin ₁ , He Li ₁ , Liam Furness ₁ , Rinaldo Raccichini _{1,

2} , Nuria Garcia-Araez ₁

Affiliation

The high abundance and low cost of aluminum and sulfur make the Al–S battery an attractive combination. However, significant improvements in performance are required, and increasing the thickness and sulfur content of the sulfur electrodes is critical for the development of batteries with competitive specific energies. This work concerns the development of sulfur electrodes with the highest sulfur content (60 wt %) reported to date for an Al–S battery system and a systematic study of the effect of the sulfur electrode thickness on battery performance. If low‐cost electrolytes made from acetamide or urea are used, slow mass transport of the electrolyte species is identified as the main cause of the poor sulfur utilization when the electrode thickness is decreased, whereas complete sulfur utilization is achieved with a less viscous ionic liquid. In addition, the analysis of very thin electrodes reveals the occurrence of degradation reactions in the low‐cost electrolytes. The new analysis method is ideal for evaluating the stability and mass transport limitations of novel electrolytes for Al–S batteries.

中文翻译：

电极厚度和副反应对铝硫电池电解质影响的关键评估。

铝和硫的高丰度和低成本使铝硫电池成为一种有吸引力的组合。然而，需要显着提高性能，增加硫电极的厚度和硫含量对于开发具有竞争性比能量的电池至关重要。这项工作涉及迄今为止报道的 Al-S 电池系统中硫含量最高（60 wt%）的硫电极的开发，以及硫电极厚度对电池性能影响的系统研究。如果使用由乙酰胺或尿素制成的低成本电解质，当电极厚度减小时，电解质物质的缓慢传质被认为是硫利用率不佳的主要原因，而使用粘度较低的离子液体则可以实现硫的完全利用。此外，对非常薄电极的分析揭示了低成本电解质中发生的降解反应。新的分析方法非常适合评估铝硫电池新型电解质的稳定性和传质限制。

更新日期：2020-04-17

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