Dual-responsive organo-sulfur network cathodes for stable high capacity polymer batteries

Novel dual-responsive organo-sulfur networks will be designed, structurally characterized and deployed for stable and efficient cathode materials for polymer batteries. The central aims of this second period of the SPP 2248 are grouped into two areas: First, we will build on the successful use of NDI-sulfur networks prepared by inverse vulcanization, their use in batteries as well as the implementation of theoretical methodologies coupled to in-operando NEXAFS spectroscopy. Particularly, we will clarify the optimum sulfur chain length of short network strands between electrochemically active organic cross-linkers. We will attempt to uncover network homogeneity and distribution of strand lengths and how its width can be experimentally modulated. Furthermore, in-operando NEXAFS spectroscopy will accompany battery characterization and clarify the formation of detrimental irreversible polysulfide formation (Sx-Liy) under varying conditions. In the second area organic linkers will be (re)designed and used for network preparation by (inverse) vulcanization or cationic polymerization. By considering preliminary results and applying criteria of i) specific capacity, ii) cycling stability and iii) availability/ scalability, we will identify structure-function relationships from a libary of organocarbonyl monomers. Finally, the results from the two areas will be merged to simultaneously surpass specific capacities of purely organic batteries and improve the generally moderate cycling stabilities of organo-sulfur-based systems. The speciality of this project lies in the triad of theoretical methodologies, synthesis of battery materials and their detailed characterization, including advanced and powerful in-operando X-ray spectroscopies. The chances for a successful project are very high due to the existing collaboration of the groups Müller/ Sommer/ Walter, which will be continued and extended in the second period.

新型的双响应性有机硫网络将在结构上进行设计，在结构上进行特征和部署，以用于聚合物电池的稳定和高效的阴极材料。 SPP 2248第二阶段的中心目标分为两个领域：首先，我们将以通过反硫化逆硫化作用的NDI-Sulfur网络的成功使用，它们在电池中的使用以及与Operando NexAF互联网Nexafs Spectroscoppoys相连的理论方法。特别是，我们将阐明电化学活性有机交联之间短网络链的最佳硫链长度。我们将尝试发现链长的网络同质性和分布，以及如何对其宽度进行实验调节。此外，在各种条件下，核心内Nexafs光谱学将处理电池表征并阐明有害不可逆的多硫化物形成（SX-LIY）。在第二区域，有机接头将是（重新）设计和用于通过（反）硫化或阳离子聚合的网络制备。通过考虑初步结果并应用了i）特定能力的标准，ii）循环稳定性和ii）可用性/可伸缩性，我们将确定来自Organocarbonyl单体的LIBARY的结构 - 功能关系。最后，将合并这两个区域的结果，以简单地超过纯有机电池的特定容量，并改善基于有机硫的系统的通常现代自行车系统。该项目的专长在于理论方法的三合会，电池材料的合成及其详细表征，包括高级和强大的Operando In-Operando X射线光谱。由于Müller/ Sommer/ Walter团体的现有合作，成功项目的机会很高，这将在第二阶段继续并扩展。