In situ visualizing the interplay between the separator and potassium dendrite growth by synchrotron X-ray tomography
文献类型：期刊论文
| 作者 | Ni, Ling; Osenberg, Markus; Liu, Haijun; Andre, Hilger; Chen, Libao; Zhou, Dong; Dong, Kang; Arlt, Tobias; Yao, Xiayin; Wang, Xiaogang |
| 刊名 | NANO ENERGY
 |
| 出版日期 | 2021 |
| 卷号 | 83 |
| 英文摘要 | Rechargeable potassium (K) batteries are a promising next-generation technology for low-cost grid scale energy storage applications. Nevertheless, the undesirable interfacial instabilities originating from the interplay between the employed separators and electrodes largely compromise the battery?s performance, and the underlying mechanism of which remains elusive. Herein, the interfacial stability between three types of commercial separators (Celgard 2325, Celgard 2400 and GF/D) and the K electrodeposits is investigated in K|K symmetric cells via in-situ Synchrotron X-ray tomography technique. It is demonstrated that the cell built with a Celgard 2400 separator can achieve a stable cycling performance due to its high mechanical strength and integrity along the thickness direction, thus alleviating the K dendrites growth. In contrast, a GF/D membrane of low mechanical cohesion and excessive porosity is found to be easily deformed and filled with deciduous potassium dendritic aggregates during battery cycling. Similarly, the tri-layer Celgard 2325 separators, which are weakly bonded by interlaminar forces, are found to be severely delaminated by the overgrowth of K dendrites. Furthermore, it is revealed that the delamination failure behaviors of Celgard 2325 is driven by the local stress induced by the spatially and heterogeneously formed dead K dendrites. Our work provides direct visualization of morphological evolvement of the separators in presence of potassium dendrites in K|K symmetric cells and highlights the significance of mechanical cohesion, porosity distribution and mechanical integrity of separators in dictating the battery?s performance under realistic battery operation conditions. As a result, these discoveries provide an indepth understanding that is needed to design next-generation high performance separators to mitigate the formation of potassium dendrite in KMBs. |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/21970]  |
| 专题 | 中国科学院宁波材料技术与工程研究所 2021专题_期刊论文 |
| 作者单位 | 1.Wang, XG 2.Sun, F (corresponding author), Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China. 3.Yang, C (corresponding author), Helmholtz Ctr Berlin Mat & Energy, Hahn Meitner Pl 1, D-14109 Berlin, Germany. |
| 推荐引用方式 GB/T 7714 | Ni, Ling,Osenberg, Markus,Liu, Haijun,et al. In situ visualizing the interplay between the separator and potassium dendrite growth by synchrotron X-ray tomography[J]. NANO ENERGY,2021,83. |
| APA | Ni, Ling.,Osenberg, Markus.,Liu, Haijun.,Andre, Hilger.,Chen, Libao.,...&Chen, Renjie.(2021).In situ visualizing the interplay between the separator and potassium dendrite growth by synchrotron X-ray tomography.NANO ENERGY,83. |
| MLA | Ni, Ling,et al."In situ visualizing the interplay between the separator and potassium dendrite growth by synchrotron X-ray tomography".NANO ENERGY 83(2021). |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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