Bibliographic Details
| Title: |
A modified separator based on ternary mixed-oxide for stable lithium metal batteries. |
| Authors: |
Fu, Zhanghua1,2 (AUTHOR), Xia, Guang1 (AUTHOR), Ye, Jiajia1 (AUTHOR), Zheng, Zhiqiang1 (AUTHOR), Wang, Jing1 (AUTHOR), Zhang, Zhongwen1,3,4 (AUTHOR) zhangzhongwen@sdu.edu.cn, Hu, Cheng1,2 (AUTHOR) c.hu@sdu.edu.cn, Chen, Chuanzhong1,2 (AUTHOR) czchen@sdu.edu.cn |
| Source: |
Journal of Colloid & Interface Science. Feb2025:Part B, Vol. 679, p830-839. 10p. |
| Subject Terms: |
*CHEMICAL stability, *LEWIS acidity, *SOLID electrolytes, *DENDRITIC crystals, *ENERGY storage |
| Abstract: |
[Display omitted] Li metal batteries (LMBs) are among the most promising options for next-generation secondary batteries under the rapidly growing demand for high-energy–density electrochemical energy storage. However, the implementation of LMBs are hindered by major obstacles such as dentritic Li deposition and low cycling Coulombic efficiency. A practical functional separator is developed in this study, which consists of a Lewis acidic mixed oxide of ZrO 2 -SiO 2 -Al 2 O 3 as a functional coating with anion anchoring ability to modulate ion transport in the vicinity of the Li metal anode, delivering a high Li+ transference number of 0.88 in carbonate electrolytes that suppresses dendrite formation. The strong Lewis acid sites in ZrO 2 -SiO 2 -Al 2 O 3 originate from coordinatively unsaturated Zr4+ ions, which immobilize anions and reduce their decomposition rate. This significantly improves the chemical stability of the electrolyte and induces a more stable solid electrolyte interphase layer. The modified separator enables an anode-free cell containing a high-loading LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode to present stable charge and discharge cycling for 150 cycles at 0.5C. By effectively suppressing Li dendrite growth and supporting the long-term operation of anode-free LMBs, this study offers a novel approach to rationally design mixed oxides with high Lewis acidity for functional separators. [ABSTRACT FROM AUTHOR] |
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| Database: |
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