Aleksei Kolesnikov, Laurin Profanter, Anindityo Arifiadi, Marvin Mohrhardt, Nick Fehlings, Ilha Lee, Martin Winter, Johannes Kasnatscheew
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引用次数: 0
Abstract
This study focuses on prelithiation of high-capacity Si electrodes (11.9 mAh cm−2) via physical vapor deposition, where high purity and homogeneity is expected. However, carbonate impurities on freshly deposited Li are shown to be inevitable by means of X-ray photoelectron spectroscopy. Also, the Li agglomerates do not disappear and insert into Si for higher degree of prelithiation (14%, which corresponds to 432 μg cm−2), thus remain on the surface leading to inhomogeneities as proven by scanning electron microscopy and nuclear magnetic resonance spectroscopy. Nevertheless, in LiNi0.6Co0.2Mn0.2O2 cells, the cycle life of the prelithiated electrodes is improved from 55% to 76% state-of-health after 306 cycles.
本研究的重点是通过物理气相沉积制备高容量Si电极（11.9 mAh cm−2）的预锂化，其纯度和均匀性都很高。然而，通过x射线光电子能谱分析表明，新沉积的锂上不可避免地存在碳酸盐杂质。此外，通过扫描电镜和核磁共振波谱分析，Li团聚体并没有消失并插入到Si中进行更高程度的预岩化（14%，相当于432 μg cm−2），因此留在表面导致不均匀性。然而，在LiNi0.6Co0.2Mn0.2O2电池中，经过306次循环后，预锂电极的循环寿命从55%提高到76%。
期刊介绍：
Advanced Energy and Sustainability Research is an open access academic journal that focuses on publishing high-quality peer-reviewed research articles in the areas of energy harvesting, conversion, storage, distribution, applications, ecology, climate change, water and environmental sciences, and related societal impacts. The journal provides readers with free access to influential scientific research that has undergone rigorous peer review, a common feature of all journals in the Advanced series. In addition to original research articles, the journal publishes opinion, editorial and review articles designed to meet the needs of a broad readership interested in energy and sustainability science and related fields.
In addition, Advanced Energy and Sustainability Research is indexed in several abstracting and indexing services, including：
CAS: Chemical Abstracts Service (ACS)
Directory of Open Access Journals (DOAJ)
Emerging Sources Citation Index (Clarivate Analytics)
INSPEC (IET)
Web of Science (Clarivate Analytics).
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