Fluorinated Interface Layer with Embedded Zinc Nanoparticles for Stable Lithium-Metal Anodes,ACS Applied Materials & Interfaces

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Fluorinated Interface Layer with Embedded Zinc Nanoparticles for Stable Lithium-Metal Anodes
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-04-06 , DOI: 10.1021/acsami.1c02868
Jingru Li ₁ , Han Su ₁ , Min Li ₂ , Jiayuan Xiang ₂ , Xianzhang Wu ₂ , Sufu Liu ₁ , Xiuli Wang ₁ , Xinhui Xia ₁ , Changdong Gu ₁ , Jiangping Tu ₁

Affiliation

Lithium-metal batteries are promising candidates for the next-generation energy storage devices. However, notorious dendrite growth and an unstable interface between Li and electrolytes severely hamper the practical implantation of Li-metal anodes. Here, a robust solid electrolyte interphase (SEI) layer with flexible organic components on the top and plentiful LiF together with lithiophilic Zn nanoparticles on the bottom is constructed on Li metal based on the spray quenching method. The fluorinated interface layer exhibits remarkable stability to shield Li from the aggressive electrolyte and restrain dendrite growth. Accordingly, the modified Li electrode delivers a stable cycling for over 400 cycles at 3 mA cm^–2 in symmetric cells. An improved capacity retention is also achieved in a full cell with a LiFePO₄ cathode. This novel design of the artificial SEI layer offers rational guidance for the further development of high-energy-density lithium-metal batteries.

中文翻译：

含嵌入式锌纳米粒子的氟化界面层，用于稳定的锂金属阳极。

锂金属电池是下一代储能设备的有希望的候选者。然而，臭名昭著的枝晶生长和锂与电解质之间的不稳定界面严重阻碍了锂金属阳极的实际植入。在此，基于金属锂的喷涂淬火方法，在顶部具有柔性有机成分的坚固的固体电解质中间相（SEI）层，在底部具有丰富的LiF以及在底部具有大量的Lithiophilic Zn纳米颗粒。氟化界面层表现出显着的稳定性，可将锂与侵蚀性电解质隔离并抑制枝晶生长。因此，在对称电池中，改良的Li电极在3 mA cm ^–2下可提供超过400个循环的稳定循环。使用LiFePO的全电池还可以提高容量保持率_4个阴极。人工SEI层的这种新颖设计为进一步开发高能密度锂金属电池提供了合理的指导。

更新日期：2021-04-21

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