Secure electrolytes for lithium-ion-batteries

锂离子电池的安全电解液

• 批准号: 288105319
• 负责人: Professor Dr.-Ing. Thomas Hanemann
• 金额: --
• 依托单位: Institut für Angewandte Materialien - Werkstoffkunde (IAM-WK)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/288105319?language=en
• 关键词: Secure; electrolytes; lithium; ion; batteries

The main objective of this proposal entitled Secure electrolytes for lithium-ion-batteries is the development of new electrolytes for lithium-ion-batteries with a significant reduction of the inflammability given in present commercial mixtures. In the first funding period three different base electrolytes with significant enhanced flash points in combination with thermal stable conduct-ing salts and for the first time integration of CO2 releasing flame-retardants in the battery cell had been developed. Despite the addition of new electrochemical passive materials in the cell the elec-trochemical performance have been retained in comparison to commercial reference electrolytes without any presence of flame-retardants. Based on that in this proposal two main research direc-tions are planned: First, the results shall be expanded from the up to now used coin cells to small and large sized pouch-bag cells investigating the upscaling to application relevant cell sizes and the related research questions of suitable scalability of all performance and safety issues. Second, the flame-retardants shall be integrated into the electrode layers enabling larger amounts within the cell and a simplified future processing. It has to be researched, how this integration affects the electro-chemical performance and the aspired safety increase. In both cases a comprehensive chemical analytic control, especially of the evolved gaseous decomposition compounds during thermal runa-way shall help to understand the decomposition mechanism and the effect of the applied flame-retardants.

这项题为“锂离子电池安全电解质”的提案的主要目标是开发新的锂离子电池电解质，大大降低目前商用混合物的易燃性。在第一个供资期内，开发了三种不同的基础电解质，其闪点显著提高，并与热稳定的导电盐结合，首次将释放CO2的阻燃剂整合到电池中。尽管在电池中添加了新的电化学钝化材料，但与不存在任何阻燃剂的商业参比电解质相比，电化学性能得到了保留。在此基础上，本方案计划了两个主要的研究方向：首先，将结果从目前使用的硬币电池扩展到小型和大型袋式电池，研究与应用相关的电池尺寸的升级以及所有性能和安全问题的适当可扩展性的相关研究问题。第二，阻燃剂应整合到电极层中，使电池内的阻燃剂量更大，并简化未来的加工。必须研究这种集成如何影响电化学性能和期望的安全性增加。在这两种情况下，全面的化学分析控制，特别是在热运行过程中产生的气态分解化合物，将有助于理解分解机制和所用阻燃剂的效果。