Electrochemical and microstructural analysis of the processes occurring in Si microwire-array anodes (and full-cells) for high capacity Lithium ion batteries

高容量锂离子电池硅微线阵列阳极（和全电池）过程的电化学和微观结构分析

• 批准号: 236979258
• 负责人: Professor Dr. Rainer Adelung
• 金额: --
• 依托单位: Lehrstuhl für Allgemeine Materialwissenschaft
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/236979258?language=en
• 关键词: Electrochemical; microstructural; analysis; processes; occurring

The main goal described in the first period proposal was: To build the most advanced silicon wire anode (SWA) for Li ion batteries presently existing even with higher capacities and higher reliability, more reliable by obtaining a better understanding of the basic processes occurring during lithiation / delithiation. Even though this is a challenging goal, it could be already fulfilled for the most part, so that in the here proposed continuation the goal will be pushed forward, mainly towards in depth understanding of the properties at performance limits and advanced full cell performance. Throughout the first period, the size dependency on the (peak) potential was understood. With FFT-Impedance Spectroscopy it could be understood how the different lengths and the thicknesses of the wires influence the charge transfer and the elastic interaction within the anode. Voltammetric measurements showed how the diffusion is limited when using different wire geometries. Those packages are still scheduled in the third year to estimate the property change at performance limits like temperature influence and different cycling parameters. This resulting structural change should be investigated by transmission electron microscopy (TEM) in the following third year. A simple and reliable method for the transfer of moisture sensitive Li-Si was successful and might boost the scientific relevance of electron microscopy in the field of moisture and beam sensitive samples. Besides the continuation of the work packages as planed in the initial proposal, we introduced an additional work package (WP 9) dealing with TEM analyses on potential cathode materials.

第一阶段提案中描述的主要目标是：通过更好地了解锂离子电池的基本过程，为现有的锂离子电池制造最先进的硅线负极(SWA)，即使在更高的容量和更高的可靠性下，也更可靠。尽管这是一个具有挑战性的目标，但它在很大程度上已经实现了，因此在这里提议的延续中，目标将向前推进，主要是深入了解性能极限和先进的全电池性能。在整个第一阶段，对(峰值)电势的大小依赖是理解的。利用快速傅立叶变换阻抗谱，可以了解不同长度和粗细的导线对阳极内的电荷转移和弹性相互作用的影响。伏安测量表明，当使用不同的导线几何形状时，扩散是如何受到限制的。这些程序包仍计划在第三年评估性能极限下的性能变化，如温度影响和不同的循环参数。这种由此产生的结构变化应该在接下来的第三年用透射电子显微镜(TEM)进行研究。一种简单可靠的转移湿敏Li-Si的方法是成功的，并可能提高电子显微镜在湿敏和束敏样品领域的科学相关性。除了按照最初的计划继续进行工作包外，我们还引入了一个额外的工作包(WP 9)，用于处理潜在阴极材料的透射电子显微镜分析。

项目成果

Hochleistungsakkus: Weiter kommen mit Silicium

高性能电池：利用硅走得更远

• DOI: 10.1002/nadc.20184068906
• 发表时间: 2018
• 期刊: Nachrichten Aus Der Chemie
• 作者: S. Hansen;J. Carstensen;L. Kienle;R. Adelung
• 通讯作者: R. Adelung

Alkali Metals Extraction Reactions with the Silicides Li15Si4 and Li3NaSi6: Amorphous Si versus allo-Si

• DOI: 10.1021/cm503371e
• 发表时间: 2014-11
• 期刊: Chemistry of Materials
• 影响因子: 8.6
• 作者: M. Zeilinger;Laura‐Alice Jantke;L. Scherf;F. Kiefer;G. Neubüser;L. Kienle;A. Karttunen;S. Konar;U. Häussermann;T. Fässler

(Re-)crystallization mechanism of highly oriented Si-microwire arrays by TEM analysis

通过 TEM 分析高度取向硅微线阵列的（重）结晶机制

• DOI: 10.1007/s10008-017-3672-6
• 期刊: Journal of Solid State Electrochemistry
• 影响因子: 2.5
• 作者: G. Neubüser;S. Hansen;V. Duppel;R. Adelung;L. Kienle
• 通讯作者: L. Kienle

Electrochemical Fabrication and Characterization of Silicon Microwire Anodes for Li Ion Batteries

• DOI: 10.1149/2.0111603jes
• 发表时间: 2016
• 期刊: Journal of The Electrochemical Society
• 影响因子: 3.9
• 作者: Sandra Nöhren;E. Quiroga‐González;J. Carstensen;H. Föll

Invited) Fabrication and Characterization of Silicon Microwire Anodes by Electrochemical Etching Techniques

特邀）电化学刻蚀技术硅微丝阳极的制备与表征

• DOI: 10.1149/06606.0027ecst
• 发表时间: 2015
• 作者: S. Nöhren;E. Quiroga-Gonzalez;J. Carstensen;H. Föll
• 通讯作者: H. Föll