Abstract
Despite the rapidly growing demand for high-performance and eco-friendly supercapacitors in the pursuit of sustainable energy storage, achieving both high volumetric energy density and ultrafast charging remains a significant challenge. Two-dimensional layered materials (2DLM) have emerged as promising electrode materials due to their ability to form highly networked nanochannels. Understanding the transport behavior of ions within these nanochannels is crucial for efficient energy storage. Recent advancements have shown promise in creating nanochannels that enhance ion transport and storage. However, controlling the properties of nanochannels has been challenging due to their nanoscale size and limited choice of solvents primarily water.Here, we propose a manufacturing method of 2DLM films that confines various solvents within the van der Waals gap, allowing for adjustable thickness from nano to micro dimensions. The confined solvents serve as nanofluidic channels, improving ion transport and achieving high-density energy storage. Our ethanol-confined films demonstrate a gravimetric capacitance of 302 F g-1 and a volumetric capacitance of 1033 F cm-3, measured at a scan rate of 100 mV s-1, which is twice as high as water-confined films. By selectively controlling the nanochannels, we can regulate the channel distance and density of the film, effectively enhancing the electrode surface potential and enabling ultrafast ion transport. This demonstration offers valuable insights into the design of 2DLM films for energy storage and conversion applications.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call