Crystal growth and electrochemistry of Lithium-based materials: Investigation of model systems for Li-ion batteries

锂基材料的晶体生长和电化学：锂离子电池模型系统的研究

• 批准号: 180020299
• 负责人: Professor Dr. Rüdiger Klingeler
• 金额: --
• 依托单位: Kirchhoff-Institut für Physik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/180020299?language=en
• 关键词: Crystal; growth; electrochemistry; Lithium; based

The project applies a systematic study in order to understand the complex structural and electronic phase diagrams of state-of-the-art cathode materials for Li-ion batteries. We will investigate the crystal growth parameters and synthesize single-crystalline model materials optimized regarding structure, stoichiometry, and size, and we will characterize them regarding their physical and chemical properties. In addition, we will study electrochemical delithiation of the single crystals along their main axes in order to investigate relations between crystal structure, electrochemical properties and kinetics of Li-diffusion along the crystal axis. In particular, we will synthesize LiMPO4, (M = Mn, Fe, Ni, (Mn,Ni), (Mn,Fe)), and LiCoO2 single crystals by means of the high-pressure traveling-solvent floating-zone technique (up to 150 bar). Later on, additional dopants (e.g., Si) will be introduced. The perfection of polycrystalline feed rods as well as single crystals will be analyzed and characterized in detail and the electronic phase diagrams will be investigated by means of magnetic, transport, and thermodynamic measurements. In addition, the crystals will be provided to the priority program where Li-kinetics, ordering phenomena, and structure will be studied, e.g. by NMR, hard x-ray diffraction, and theoretical modelling.Note: The recently granted BMBF-Research group 03SF0340/LIB2015 aiming at the investigation of nanoscaled and single-crystalline cathode materials shall be associated with the SPP. The research group will move to University of Heidelberg. I hence apply for a high-pressure travelingsolvent floating-zone furnace.

该项目进行了系统研究，以了解最先进的锂离子电池正极材料的复杂结构和电子相图。我们将研究晶体生长参数并合成在结构、化学计量和尺寸方面优化的单晶模型材料，并对其物理和化学性质进行表征。此外，我们还将研究单晶沿主轴的电化学脱锂，以研究晶体结构、电化学性能和锂沿晶轴扩散动力学之间的关系。特别是，我们将通过高压行溶剂浮区技术合成LiMPO4，（M = Mn，Fe，Ni，（Mn，Ni），（Mn，Fe））和LiCoO2单晶（向上）至 150 巴）。稍后，将引入额外的掺杂剂（例如 Si）。将详细分析和表征多晶喂料棒以及单晶的完善性，并通过磁、输运和热力学测量来研究电子相图。此外，这些晶体将提供给研究锂动力学、有序现象和结构的优先项目，例如：注：最近授予的 BMBF 研究小组 03SF0340/LIB2015 旨在研究纳米级和单晶阴极材料，应与 SPP 相关。研究小组将迁往海德堡大学。因此我申请了高压流动溶剂浮区炉。