Dual‐Scale Al2O3 Particles Coating for High‐Performance Separator and Lithium Metal Anode,Energy Technology

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Dual‐Scale Al2O3 Particles Coating for High‐Performance Separator and Lithium Metal Anode
Energy Technology ( IF 3.6 ) Pub Date : 2020-03-05 , DOI: 10.1002/ente.201901429
Qingtong Wang ₁ , Jian Yang ₁ , Zhuyi Wang ₁ , Liyi Shi ₁ , Yin Zhao ₁ , Shuai Yuan _{1,

2}

Affiliation

Herein, the polyethylene (PE) separators are coated by micro/nanoalumina particles. The alumina particles with different sizes play different roles. The microalumina mainly enhances the thermal stability of the polyolefin separator and provides large channels for lithium‐ion diffusion. The nanoalumina particles are helpful in improving the lithium‐ion transference number by increasing the contact interface area of electrolyte/alumina. The lithium‐ion transference number of the separators with different coatings increases from 0.32 to 0.40, mainly due to the ratio of micro/nanoalumina particles. Meanwhile, ion conductivity increases from 0.30 to 0.40 mS cm⁻¹. As a result, the cycling stability of the lithium metal anode is greatly improved by the synergetic effect of microsized alumina particles and nanosized alumina particles.

中文翻译：

高性能隔膜和锂金属阳极的双尺度Al2O3颗粒涂层

在此，聚乙烯（PE）隔板被微米/纳米氧化铝颗粒涂覆。不同尺寸的氧化铝颗粒起不同的作用。微氧化铝主要增强了聚烯烃隔膜的热稳定性，并为锂离子扩散提供了较大的通道。纳米氧化铝颗粒通过增加电解质/氧化铝的接触界面面积，有助于改善锂离子转移数。具有不同涂层的隔膜的锂离子转移数从0.32增加到0.40，这主要归因于微米/纳米氧化铝颗粒的比例。同时，离子电导率从0.30增加到0.40 mS cm ^-1。结果，通过微尺寸氧化铝颗粒和纳米尺寸氧化铝颗粒的协同作用，锂金属阳极的循环稳定性大大提高。

更新日期：2020-03-05

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