Abubakar Dahiru Shuaibu, Abdulmajid A. Mirghni, Syed Shaheen Shah, Yuda Prima Hardianto, Atif Saeed Alzahrani, Md. Abdul Aziz
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引用次数: 0
Abstract
This study investigates the advancement of coin cell supercapacitors (SCs) for sustainable, high-performance energy storage by employing biomass-derived date stone activated carbon with various ionic liquid (IL) electrolytes at different temperatures. The research reveals that SCs demonstrate both pseudocapacitive and electrochemical double-layer characteristics. Among the tested ILs, 1-Butyl-3-methylimidazolium trifluoromethanesulfonate (BMIMOTf) emerges as the most effective, achieving an impressive energy density of 129.9 Wh kg−1, a power density of 403.8 W kg−1, and a specific capacitance of 103.9 F g−1 at 0.5 A g−1. After 5000 cycles, the supercapacitor utilizing BMIMOTf maintains 97.3% of its initial capacitance and exhibits a Coulombic efficiency approaching 100%. Additionally, temperature-dependent analyses from room temperature to 50°C reveal that higher temperatures boost the electrochemical performance of the SC, attributed to improved ionic conductivity. This research offers a more comprehensive understanding of how materials and electrolytes interact, emphasizing the capacity of BMIMOTf to foster innovations in eco-friendly energy storage solutions.
本研究通过在不同温度下使用含有不同离子液体（IL）电解质的生物质来源的枣石活性炭，研究了硬币电池超级电容器（SCs）的可持续、高性能储能技术的进展。研究表明，sc具有赝电容和电化学双层特性。在测试的ILs中，1-丁基-3-甲基咪唑三氟甲磺酸盐（BMIMOTf）是最有效的，实现了129.9 Wh kg - 1的能量密度，403.8 W kg - 1的功率密度和103.9 F g - 1的比电容，在0.5 a g - 1。经过5000次循环后，利用BMIMOTf的超级电容器保持了97.3%的初始电容，并显示出接近100%的库仑效率。此外，从室温到50°C的温度相关分析表明，由于离子电导率的提高，更高的温度可以提高SC的电化学性能。这项研究提供了对材料和电解质如何相互作用的更全面的理解，强调了BMIMOTf促进环保储能解决方案创新的能力。
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