Bipolar Polymeric Protective Layer for Dendrite-Free and Corrosion-Resistant Lithium Metal Anode in Ethylene Carbonate Electrolyte

Chenglong Deng, Binbin Yang, Yaohui Liang, Yi Zhao, Boshun Gui, Chuanyu Hou, Yanxin Shang, Jinxiang Zhang, Tinglu Song, Xuzhong Gong*, Nan Chen*, Feng Wu, Renjie Chen*

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

4 引用 (Scopus)

摘要

The unstable interface between Li metal and ethylene carbonate (EC)-based electrolytes triggers continuous side reactions and uncontrolled dendrite growth, significantly impacting the lifespan of Li metal batteries (LMBs). Herein, a bipolar polymeric protective layer (BPPL) is developed using cyanoethyl (−CH2CH2C≡N) and hydroxyl (−OH) polar groups, aiming to prevent EC-induced corrosion and facilitating rapid, uniform Li+ ion transport. Hydrogen-bonding interactions between −OH and EC facilitates the Li+ desolvation process and effectively traps free EC molecules, thereby eliminating parasitic reactions. Meanwhile, the −CH2CH2C≡N group anchors TFSI anions through ion-dipole interactions, enhancing Li+ transport and eliminating concentration polarization, ultimately suppressing the growth of Li dendrite. This BPPL enabling Li|Li cell stable cycling over 750 cycles at 10 mA cm−2 for 2 mAh cm−2. The Li|LiNi0.8Mn0.1Co0.1O2 and Li|LiFePO4 full cells display superior electrochemical performance. The BPPL provides a practical strategy to enhanced stability and performance in LMBs application.

源语言英语
文章编号e202400619
期刊Angewandte Chemie - International Edition
63
17
DOI
出版状态已出版 - 22 4月 2024

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引用此

Deng, C., Yang, B., Liang, Y., Zhao, Y., Gui, B., Hou, C., Shang, Y., Zhang, J., Song, T., Gong, X., Chen, N., Wu, F., & Chen, R. (2024). Bipolar Polymeric Protective Layer for Dendrite-Free and Corrosion-Resistant Lithium Metal Anode in Ethylene Carbonate Electrolyte. Angewandte Chemie - International Edition, 63(17), 文章 e202400619. https://doi.org/10.1002/anie.202400619