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锂金属电池中隔膜结构与锂金属沉积形貌演化的关系尚不清晰，原位实验和数值模拟能够揭示影响机理。通过自主研发原位光学-电化学耦合装置，可直观观测锂金属沉积过程的形貌演化情况。对三种不同的隔膜进行原位实验研究，发现玻璃纤维隔膜相较于聚丙烯隔膜更容易产生锂金属枝晶，聚丙烯和聚乙烯复合隔膜比单层聚丙烯隔膜表现出更均匀的锂金属沉积形貌。扫描电子显微镜图像显示三种隔膜具有不同的微结构，结合相场法数值的模拟分析，发现隔膜微结构对锂金属沉积形貌演化、锂金属枝晶的生成具有重要影响，相场模拟结果符合原位实验观测结果。
Abstract：The relationship between the separator structure and the morphology evolution of lithium electrodeposition in lithium metal batteries is still unclear. The reaction mechanism can be revealed by in-situ experiments and numerical simulations. The morphology evolution of lithium electrodeposition can be observed directly by a home-made in-situ optic-electrochemical coupling device. In-situ experimental studies on three different separators revealed that glass fiber separator is more prone to lithium metal dendrite formation compared to polypropylene separators, while polypropylene and polyethylene composite separators exhibit more uniform lithium metal deposition morphology than the single-layer polypropylene separator. Scanning electron microscope images demonstrate distinct microstructures among the three separators. Combined with phase-field method numerical simulations, the results indicate that separator microstructures significantly influence lithium metal deposition morphology evolution and dendrite formation, with phase-field simulation outcomes aligning well with in-situ experimental observations.
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基本信息:
DOI：10.19996/j.cnki.ChinBatlnd.2026.01.002
中图分类号:TG146.26;TM912
引用信息:
[1]何杰,初雨晨,王胜科.隔膜对锂沉积影响的原位光学实验和相场模拟[J].电池工业,2026,30(01):4-8.DOI:10.19996/j.cnki.ChinBatlnd.2026.01.002.
2025-05-08
2025-05-08
2025-05-08