论文标题
固体电解质的相互作用（SEI）（SEI）
Solid-electrolyte interphases (SEI) in nonaqueous aluminum-ion batteries
论文作者
论文摘要
非水铝合金电池是一种有趣的新兴储能技术，比现有的网格储能解决方案提供了许多优势。碳质和石墨材料是该系统中具有吸引力的阴极材料，这要归功于它们的低成本和出色的速率功能。然而，在第一个周期中，库仑效率差的现象是某些类型的碳中的一个已知问题，其原因尚未完全理解。在这项工作中，我们建议这样的过程是由与锂离子电池中石墨阳极相似的固体相互作用形成引起的。使用电纺碳纳米纤维作为具有可调结晶性的模型材料，发现这种现象的原因与阴极材料中的表面缺陷有关，并被高表面积进一步扩增。但是，简单的粘合剂聚合物的使用有助于通过屏蔽与电解质直接接触的表面缺陷来减轻问题。
Nonaqueous aluminum-ion batteries are an interesting emerging energy storage technology, offering a plethora of advantages over existing grid energy storage solutions. Carbonaceous and graphitic materials are an appealing cathode material in this system, thanks to their low cost and excellent rate capabilities. The phenomenon of poor Coulombic efficiency in the first cycle, however, is a known issue among some types of carbons, the reasons for which are yet to be fully understood. In this work, we propose that such processes are caused by the formation of a solid-electrolyte interphase, in a similar fashion to graphite anodes in lithium-ion batteries. Using electrospun carbon nanofibers as a model material with tunable crystallinity, the cause of such phenomena was found to be linked to the presence of surface defects in the cathode material, and was further amplified by high surface area. The simple use of a binder polymer, however, helps mitigating the issue by shielding surface defects from direct contact with the electrolyte.
