Nano textured core-shell carbide-derived carbon particles for electrochemical energy storage and electrocatalysis (COSH-CDC)

用于电化学储能和电催化的纳米结构核壳碳化物衍生碳颗粒（COSH-CDC）

基本信息

批准号：
374564898
负责人：
Professor Dr.-Ing. Bastian Etzold
金额：
--
依托单位：
Leibniz-Institut für Neue Materialien gGmbH (INM)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2017
资助国家：
德国
起止时间：
2016-12-31 至 2020-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/374564898?language=en
关键词：
Nano textured core shell carbide

项目摘要

In this project, we will synthesize core/shell hybrid materials for electrochemical applications, based on a novel two-step synthesis that we have recently developed. Using a metal carbide powder, our approach is to first achieve partial transformation of the outer part of the granular material to carbide-derived carbon (CDC) by chlorination. The second step employs either calcination of the residual core (yielding metal oxide for energy storage applications), or a second chlorination step (yielding a carbon core with a porosity very different from the shell for electrocatalysis). The key of partial transition of carbide-to-CDC is the use of homogenously distributed NiCl2, yielding a highly controllable in situ formation of chlorine gas in a precisely tuned stoichiometric ratio. The use of different metal carbides, namely, TiC, VC, NbC, and Mo2C, enables us to design different metal oxide cores (for energy storage) or different porosities of the core (for electrocatalysis).Recent joint work of the two PIs has established the feasibility of both core/shell designs, namely, metal oxide / CDC and CDC/CDC core shell particles. Yet, a systematic and comprehensive understanding of structure/property correlations and surveying of the electrochemical properties is still missing. Bringing the key expertise of synthesis, electrochemical energy storage, and electrocatalysis of the Etzold Group (TU Darmstadt) and Presser Group (INM Saarbrücken), we will be able to create synergistic added value and provide for the project-involved PhD students a vibrant collaborative research environment to broaden their knowledge beyond a selected electrochemical application.Electrochemical energy storage of our core/shell particles will capitalize on the high charge storage capacity of the metal oxide core, which can only be utilized because of the high electrical conductivity of the mesoporous carbon shell. By this way, no additional conductive additive is required to be added and possibly high power handling can be enabled. Having a metal oxide core and a carbon shell is also different from a large amount of current hybrid material works, where the metal oxide is grown on top of the carbon substrate. We will investigate aqueous and non-aqueous electrolytes to study the hybrid materials' redox-activity and lithium ion intercalation ability.For electrocatalysis, platinum will be deposited on the hierarchically structured carbons with graphitic and mesoporous shell and microporous and amorphous cores. The influence of the special carbon architecture on cathode (oxidation reduction reaction) and anode site (hydrogen oxidation reaction; methanol oxidation reaction) fuel cell reactions will be studied. Thereby improved performance is expected as the core facilitates a high dispersion and thus activity of the catalyst, while the shell improves with its mesoporosity the mass transfer and reduces with its graphitic character the Ohmic resistance.

在这个项目中，我们将基于我们最近开发的新型两步合成，将核/壳混合材料用于电化学应用。使用金属碳化物粉末，我们的方法是首先通过氯化颗粒材料的外部部分转化为碳化物衍生的碳（CDC）。第二步的员工要么计算残留核心（产生用于储能应用的金属氧化物），要么是第二个氯化步骤（产生的碳芯与孔隙率与壳的孔子大不相同以进行电催化）。碳化物到CDC部分过渡的关键是使用均匀分布的NICL2，在精确调整的化学计量比中产生高度控制的氯气的原位形成。使用不同金属碳化物的使用，即TIC，VC，NBC和MO2C，使我们能够设计核心的不同金属氧化物芯（用于储能）或不同的孔隙度（用于电催化）。两个PIS的关节工作已经确定了核心/壳的壳核心/CDC/CDC/CDC的可行性，即核心/CDC/CDC的可行性。结构/属性相关性和电化学性质的测量仍然缺失。 Bringing the key expertise of synthesis, electrochemical energy storage, and electrocatalysis of the Etzold Group (TU) Darmstadt) and Presser Group (INM Saarbrücken), we will be able to create synergistic added value and provide for the project-involved PhD students a vibrant collaborative research environment to broaden their knowledge beyond a selected electrochemical application.Electrochemical energy storage of our core/shell颗粒将资本利用金属氧化物芯的高电荷存储能力，这只能由于中孔碳壳的高电导率而被利用。这样，不需要添加其他导电添加剂，并且可以启用可能的高功率处理。具有金属氧化物芯和碳壳也不同于大量当前的杂化材料作品，其中金属氧化物在碳底物的顶部生长。我们将研究水性和非水电器，以研究杂交材料的氧化还原活性和锂离子插入能力。用于电催化性，铂对阴极建筑对阴极（氧化还原）（氧化还原）的影响（氧化还原反应）和阳极位点（氢氧化反应）；甲醇氧化反应；甲醇氧化反应）燃料反应将燃料反应燃料反应。因此，预计性能会提高，因为核心设施是高度分散的，因此可以通过其介孔性来改善催化剂的活性，而壳的质量转移则可以通过其图形性特征为欧姆电阻而减少。