Transforming Supercapacitors by using Metal-Organic Framework Electrodes

使用金属有机框架电极改造超级电容器

• 批准号: EP/X042693/1
• 负责人: Alexander Forse
• 金额: $ 274.51万
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FX042693%2F1
• 关键词: Transforming; Supercapacitors; using; Metal; Organic

Supercapacitors are high power energy storage devices that can complement batteries in a more sustainable future. However, the improvement of supercapacitors is hindered by the disordered structures of the porous carbon electrodes that are used. To date, it has been very challenging to correlate electrode structure with (i) supercapacitor performance, and (ii) the molecular charging mechanism, making it very difficult to design improved devices. The emergence of conducting metal-organic framework (MOF) electrodes with well-defined porous structures provides an excellent opportunity to address these challenges. For the first time, we will use MOFs as model electrode systems to transform our understanding of supercapacitors.The overarching objective of SUPERMOFS is to correlate electrode structure with the molecular charging mechanism and performance of supercapacitors. To achieve this goal;1. We will synthesise a series of MOF electrodes where the pore size, surface functional groups, and particle morphologies are varied. Electrochemical measurements on a series of supercapacitors will then reveal the impact of these structural features on energy storage capacities and charging rates. Our use of structurally well-defined electrodes will lead to unprecedented insights into how electrode structure determines supercapacitor performance.2. Using our series of MOFs, we will reveal how electrode structure determines the molecular charging mechanisms of supercapacitors for the first time. We will develop new in situ nuclear magnetic resonance (NMR) spectroscopy for studying MOF supercapacitors to determine molecular charging mechanisms (ion adsorption, ion exchange etc.), as well as ionic diffusion rates at different cell voltages. These studies will forge a mechanistic bridge between electrode structure and capacitive performance.Overall, this project will transform our understanding of how supercapacitors work, and will directly lead to improved supercapacitors.

超级电容器是高功率储能设备，可以在更可持续的未来补充电池。然而，超级电容器的改进受到所使用的多孔碳电极的无序结构的阻碍。迄今为止，将电极结构与（i）超级电容器性能和（ii）分子充电机制关联起来非常具有挑战性，这使得设计改进的设备非常困难。具有明确多孔结构的导电金属有机框架（MOF）电极的出现为解决这些挑战提供了绝佳的机会。我们将首次使用 MOF 作为模型电极系统来转变我们对超级电容器的理解。SUPERMOFS 的首要目标是将电极结构与超级电容器的分子充电机制和性能联系起来。为实现这一目标；1．我们将合成一系列孔径、表面官能团和颗粒形态各异的 MOF 电极。对一系列超级电容器的电化学测量将揭示这些结构特征对储能容量和充电速率的影响。我们使用结构明确的电极将对电极结构如何决定超级电容器性能产生前所未有的见解。2。使用我们的系列 MOF，我们将首次揭示电极结构如何决定超级电容器的分子充电机制。我们将开发新的原位核磁共振（NMR）光谱，用于研究 MOF 超级电容器，以确定分子充电机制（离子吸附、离子交换等）以及不同电池电压下的离子扩散速率。这些研究将在电极结构和电容性能之间架起一座机械桥梁。总体而言，该项目将改变我们对超级电容器工作原理的理解，并将直接导致超级电容器的改进。