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Research background

Electrochemical double-layer capacitors (EDLCs) are a type of energy storage device with ultra-strong power performance and longer cycle life than batteries. Activated carbon electrodes are the main component of EDLCs, and their structure is complex, consisting of a porous network formed by graphene sample layers. Understanding the structure of carbon electrodes is crucial for optimizing the performance of supercapacitors. However, past studies have found that the capacitance improvement related to pore size is not clear. This has led to exploration of other structural variables, especially the local structural disorder related to capacitance. Ordered domain size is an important concept, which refers to the average size of graphene-like fragments that form carbon pore walls. However, accurately measuring and understanding the local structural disorder of carbon electrodes and their relationship with capacitance remains a challenge.

In order to solve these problems, Alexander C. Forse’s team from the Department of Chemistry at the University of Cambridge conducted a new study. They first evaluated the capacitance performance of a series of commercial nanoporous…