Abstract
Due to their exceptional properties such as lightweight, high electrical conductivity, specific surface area (SSA), adjustable pore structures, and desired surface characteristics, carbonaceous materials have substantial interest as electrode materials for supercapacitors (SCs). In attempts to achieve high energy density, ionic liquid (IL) electrolyte is has attracted great attention Because it can be used in a wide voltage range. However, initial attempts to incorporate IL into SCs encountered challenges, as the large and sluggish ions struggled to effectively access the narrow pores of conventional microporous carbons. In addressing these issues, we have synthesized interconnected meso/macroporous carbon spheres (MCSs) that were produced via co-assembly of polymer and silica sphere (20-70 nm). The interconnected large meso/macropores facilitated ion mass-transport and thereby efficient utilization of the carbon electrode's surface for capacitive energy storage. The MCS-based SCs demonstrated a high capacitance (328.93 F g-1) and ultrahigh energy density (182.7 Wh kg-1), and MCS/IL-based inogel SCs exhibited a remarkably high energy density of 0.111 mWh cm⁻ 2 and a high-power density 8.89 m Wcm-2 demonstrated excellent mechanical durability 0% and 100% strain, with notable capacitive retention of 95.3% observed at 100% strain. Comparable to the best results reported to date. Therefore, the results obtained in this study provide morphological insights into the differences in electrochemical performance based on pore size and particle size. Additionally, these findings contribute to the design of carbon-based materials suitable for electrochemically robust yet dynamically sluggish ionic liquid electrolytes, aiming for high-performance deformable energy supply devices.
Published Version
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