EXSOLUTION-BASED NANOPARTICLES FOR LOWEST COST GREEN HYDROGEN VIA ELECTROLYSIS

基于萃取的纳米颗粒通过电解生产成本最低的绿氢

• 批准号: 10102891
• 金额: $ 54.34万
• 依托单位: UNIVERSITY OF ST ANDREWS
• 依托单位国家: 英国
• 项目类别: EU-Funded
• 财政年份: 2024
• 资助国家: 英国
• 起止时间: 2024 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=10102891
• 关键词: EXSOLUTION; BASED; NANOPARTICLES; LOWEST; COST

Today’s alkaline electrolysers favour current densities over efficiency: to achieve commercially relevant current densities, these systems typically operate at voltages exceeding 2 V/cell, corresponding to electrolyser power consumption of>54 kWh/kg. There are four reasons for employing high voltages:1) electrodes’ insufficient electrochemical activity, 2) the relatively high gas permeability of commonly employed diaphragms means that improved hydrogen purity can be achieved at high current operation points, 3) the stack designs are not optimised for low-current operation due to very simple flow fields, and 4) high currents are required to achieve attractive electrolyser CAPEX costs (EUR/kW). Yet, there is a growing consensus that the wider adoption of green H2 is not hindered by electrolyser CAPEX: the costs of green H2 are in most cases vastly dominated by OPEX, which in turn is a direct function of electrolyser efficiency. Thus, to achieve lowest possible levelised cost of H2, efficiency should be prioritised over current density. EXSOTHyC will optimise electrolyseroperation towards lower voltages and higher efficiencies. The innovation is three-fold and addressing all four above-mentioned reasons: Alternative pathways to the O2 and H2 evolution reactions by new anode and cathode approaches • Novel concepts of membrane electrode assemblies with integrated components • Novel cell design to enhance overall cell efficiency by integrating disruptive concepts In the project, we adopt an approach combining computer simulations, rapid prototyping, and thorough experimental validation on single cell, SRU and shortstack level. In a nutshell, we will combine electrodes made using powder metallurgy with ceramic nanoparticles fabricated by exsolution, leveraging on the synergy that both methods require reducing atmospheres. Also, membrane-electrode assemblies based on Zirfon will be developed. The cell/stack will be backed by computer modelling.

当今的碱性电解槽更倾向于电流密度而不是效率：为了实现商业上相关的电流密度，这些系统通常在超过2 V/电池的电压下操作，对应于>54 kWh/kg的电解槽功耗。采用高电压有四个原因：1）电极的电化学活性不足，2）通常采用的隔膜的相对高的气体渗透性意味着可以在高电流操作点实现改进的氢气纯度，3）由于非常简单的流场，堆设计没有针对低电流操作进行优化，以及4）需要高电流来实现有吸引力的电解槽CAPEX成本（EUR/kW）。然而，人们越来越一致地认为，更广泛地采用绿色H2不会受到电解槽资本支出的阻碍：在大多数情况下，绿色H2的成本在很大程度上取决于运营支出，而运营支出又是电解槽效率的直接函数。因此，为了实现H2的尽可能最低的平准化成本，效率应优先于电流密度。EXSOTHyC将优化电解槽操作，以实现更低电压和更高效率。创新有三个方面，解决了上述所有四个原因：通过新的阳极和阴极方法实现O2和H2析出反应的替代途径·具有集成组件的膜电极组件的新概念·通过集成颠覆性概念提高整体电池效率的新电池设计在该项目中，我们采用了结合计算机模拟，快速原型制作，并在单电池、SRU和短堆水平上进行了充分的实验验证。简而言之，我们将结合联合收割机电极使用粉末冶金与陶瓷纳米粒子制造的出溶，利用协同作用，这两种方法都需要减少气氛。此外，将开发基于锆封的膜电极组件。电池/电池堆将得到计算机建模的支持。