Y. Takase , M. Kodama , R. Iwamura , H. Kawakami , K. Aotani , Y. Aihara , S. Hirai
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引用次数: 0
Abstract
All-solid-state batteries with lithium-metal anodes are expected to exhibit high performance. For practical application, the growth of lithium dendrites must be suppressed. One method to suppress dendrite growth is to insert a carbon interlayer at the interface between the anode and solid electrolyte (SE). Dendrite growth is related to the anode interface properties and depends on the SE particle size used in the SE layer. Appropriate control of the SE particle size used at the anode interface can improve battery performance. In this study, the effects of SE particle size and carbon interlayer type on lithium-metal deposition morphology are investigated by X-ray CT measurement. The results show that dendrite growth is suppressed when the small-particle SE is used owing to the smaller pores between the SE layer and carbon interlayer. In addition, by controlling the SE particle size distribution using a double SE layer, both high ionic conductivity and dendrite suppression can be achieved. Furthermore, dendrite growth can be suppressed using a silver particle-added carbon interlayer, even with the large-particle SE where dendrites are prone to grow more easily.
采用锂金属阳极的全固态电池有望实现高性能。在实际应用中,必须抑制锂枝晶的生长。抑制枝晶生长的一种方法是在阳极和固体电解质(SE)之间的界面上插入一层碳中间膜。枝晶的生长与阳极界面的特性有关,并取决于 SE 层中使用的 SE 颗粒大小。适当控制阳极界面上使用的固态电解质粒度可以提高电池性能。本研究通过 X 射线 CT 测量研究了 SE 颗粒大小和碳夹层类型对锂金属沉积形态的影响。结果表明,使用小颗粒 SE 时,由于 SE 层和碳夹层之间的孔隙较小,枝晶的生长受到抑制。此外,通过使用双 SE 层来控制 SE 的粒度分布,可以同时实现高离子电导率和抑制枝晶生长。此外,使用添加了银颗粒的碳中间层还能抑制枝晶的生长,即使是使用更容易生长枝晶的大颗粒 SE 也是如此。
期刊介绍:
Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.