Development of novel organophosphorus electron acceptor molecules for application as organic materials based batteries

减缓气候变化是21世纪的主要挑战之一，在上一次巴黎联合国气候变化会议的背景下，推广可再生能源是强制性的。这包括开发高效的储能设备，但与大多数快速发展的电子设备领域相比，电池技术的进程相当缓慢。特别是二次(充电)电池领域缺乏改进，导致电子设备对电池性能的依赖成为瓶颈。因此，需要在可充电电池领域进行改进，以产生传统的金属储能材料的替代品。由于传统电池由正极、负极和导电电解液组成，这些都是基于含有金属的材料，因此用经济高效和可再生的有机材料来替代将是有益的。目前，正极材料占传统锂离子电池总生产成本的40%，特别是正极材料的替代将带来电池性能的改善。此外，纯有机电池的发展，其中所有三个组成部分都是由有机材料制成的，可能会带来有效的替代方案，以取代目前固定的金属基蓄电池。因此，本课题主要研究有机正极材料的合成及其在纯有机电池和有机-无机混合电池中的应用。这些活性阴极材料将以磷为基础，作为分子的组成部分，因为与文献中已知的含氮类似物相比，它们具有优越的性能，但很少受到科学关注。有希望的结构还将被微调，以产生带有取代基的分子，以增强自组装性能和提高效率。这些分子随后将在电池测试单元中进行分析，以了解它们在实际设备中的性能。

Climate change mitigation is one of the major challenges of the 21st century and in the context of the last United Nations Climate Change Conference in Paris, promotion of renewable energy sources is mandatory. This includes the development of efficient energy storage devices, but in contrast to most of the fast evolving areas of electronic devices, process on battery techniques is quite slow. Especially the field of secondary (rechargeable) batteries lacks improvement resulting in a bottleneck of electronic devices relying on the battery performance. Thus, improvements in the field of rechargeable batteries are needed to yield alternatives for conventional, metal-based energy storage materials. As conventional batteries consist of a cathode, anode and conducting electrolyte, which are all based on metal containing materials, substitution by cost-efficient and regenerative organic materials would be beneficial. With the cathode material contributing 40% to the overall production cost of conventional Li-Ion batteries nowadays, substitution of the cathode material in particular would give rise to improved batteries. Furthermore, the development of pure organic batteries, in which all three components are made of organic materials, could lead to efficient alternatives to today`s stationary metal-based accumulators. Therefore, this research project focuses on the synthesis of organic cathode materials and their application in pure organic as well as in organic-inorganic hybrid batteries. These active cathode materials will be based on phosphorus as integral part of the molecule since they offer advantageous properties compared with their literature known nitrogen containing analogues but have found little scientific attention. Promising structures will additionally be fine-tuned to yield molecules with substituents for enhanced self-assembling properties and improved efficiency. These molecules will be subsequently analysed in battery test cells concerning their performance in actual devices.