2D/1D nanocomposites for energy storage applications

用于储能应用的 2D/1D 纳米复合材料

• 批准号: 467814954
• 负责人: Dr. Kevin Synnatschke
• 金额: --
• 依托单位: Chemical Physics of Low-Dimensional Nanostructures
• 依托单位国家: 德国
• 项目类别: WBP Fellowship
• 财政年份: 2021
• 资助国家: 德国
• 起止时间: 2020-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/467814954?language=en
• 关键词: 2D; 1D; nanocomposites; energy; storage

The aim of this research proposal is to prepare and to study hybrid electrodes of one- and two-dimensional (1D/2D) nanomaterials for energy storage applications, such as Li/Na-ion batteries.To this end, liquid phase exfoliation of transition metal hexathio- and hexaseleno-diphosphates (2D) is going to be performed in inert gas conditions. The resulting dispersion will be size-selected by reported centrifugation techniques which will enable to prepare composites of different sizes of the 2D nanomaterial with carbon nanotubes (1D). For a competitive use of nanomaterials or nanocomposites in device applications, it will be necessary to understand and to exploit synergistic effects between the individual compounds. Systematic studies on the different impacts on the electrode performance such as i.a., the nanoparticle size and thickness, 1D/2D mixing ratio, intercalation compound, will be required in order to rationalise the development of high-performance electrodes.For this purpose, different mixing ratios between the 1D and 2D nanomaterial have to be tested for different sizes and thicknesses of the 2D nanoplatelets in order to study geometric impacts on the 1D/2D interaction. Such studies are going to be implemented on a model system (Ni2P2S6), which was analysed by the applicant in previous exfoliation experiments. The fabricated anodes will be implemented in experimental Li- and Na-ion battery full cells and characterised by microscopy and spectroscopy, as well as mechanically and electronically before and after charge/discharge cycle experiments, respectively.Such experiments will enable to separate material decomposition occurring upon processing from effects arising from device operation, which will be helpful for optimisation of the electrode architecture, as well as for identification and prevention of effects that promote the material degradation.The knowledge gained from these results will be used to implement and study other M2P2Ch6 (M = transition metal, Ch = chalcogenide) species in energy storage devices. While for other compounds, similar tedious measurements have to be performed as for the Ni2P2S6 electrodes, the full characterisation is important for a solid benchmarking and to further study and understand the impacts of different material properties on the intercalation chemistry and thus the electrode performance of this unique isomorphous material systems. This will allow to rationally identify ideal candidates for novel high-performance nanocomposite electrodes.The experiments performed in inert gas conditions will be repeated in ambient conditions in order to study the stability of the electrodes in realistic and industrially relevant processing conditions, which will give deeper insights into degradation processes and enable to find strategies how to prevent them.To this end, it will be important to study the electrode morphology, chemical composition and performance before and after charge cycles, respectively.

该研究建议的目的是准备和研究用于储能应用的一维（1D/2D）纳米材料的杂交电极，例如Li/Na-ion电池。所得的分散剂将通过报告的离心技术进行大小选择，这将使能够用碳纳米管（1D）制备不同尺寸的2D纳米材料的复合材料。为了在设备应用中使用纳米材料或纳米复合材料的竞争使用，有必要理解和利用各个化合物之间的协同作用。为了合理化高性能电极的发展，需要对电极性能的不同影响，例如I.A.，例如I.A。几何影响对1D/2D相互作用。这些研究将在模型系统（NI2P2S6）上实施，该模型系统将在先前的去角质实验中进行分析。 制造的阳极将在实验性的Li-和Na-ion电池完整电池中实现，并以显微镜和光谱的方式以及在充电/放电周期实验前后的机械和电子后的机械和电子方式进行特征从这些结果中获得的知识将用于实施和研究其他M2P2CH6（M =过渡金属，CH =硫代基因化的）物种。尽管对于其他化合物，但必须与NI2P2S6电极进行类似的繁琐测量值，但完整的表征对于固体基准测试至关重要，并进一步研究并了解不同材料特性对互相化学的影响，从而对这种独特的异形材料系统的电极性能进行了影响。这将允许合理地确定新型高性能纳米复合电极的理想候选者。在惰性气体条件下进行的实验将在环境条件下重复，以研究电极在现实且与工业相关的处理条件下的稳定性，这将使该策略更加有效地进行策略。和电荷循环前后的性能。