Abdullah Syed Muhammad, Marwat Mohsin Ali, Adam Kanwar Muhammad, Din Zia Ud, Humayun Muhammad, Abdul Karim Muhammad Ramzan, Ghazanfar Esha, Bououdina Mohamed, Hamayun Umaima, Youssef Mahmoud Saber, Ali Hafiz Tauqeer
Faculty of Materials and Chemical Engineering, Ghulam Ishaq Khan (GIK) Institute of Engineering Sciences and Technology Topi 23640 Pakistan
Energy, Water, and Environment Lab, College of Humanities and Sciences, Prince Sultan University Riyadh 11586 Saudi Arabia.
RSC Adv. 2024 May 1;14(20):14438-14451. doi: 10.1039/d4ra01324g. eCollection 2024 Apr 25.
Supercapacitors have substantially altered the landscape of sophisticated energy storage devices with their exceptional power density along with prolonged cyclic stability. On the contrary, their energy density remains low, requiring research to compete with conventional battery storage devices. This study addresses the disparities between energy and power densities in energy storage technologies by exploring the integration of layered double hydroxides (LDH) and highly conductive materials to develop an innovative energy storage system. Four electrodes were fabricated a hydrothermal process using NiCoCu LDH, Ag-citrate, PANI, and f-SWCNTs. The optimal electrode demonstrated exceptional electrochemical properties; at 0.5 A g, it possessed specific capacitances of 807 F g, twice as high as those of the pure sample. The constructed asymmetric supercapacitor device attained energy densities of 62.15 W h kg and 22.44 W h kg, corresponding to power densities of 1275 W kg and 11 900 W kg, respectively. Furthermore, it maintained 100% cyclic stability and a coulombic efficiency of 95% for 4000 charge-discharge cycles. The concept of a supercapacitor of the hybrid grade was reinforced by power law investigations, which unveiled -values in the interval of 0.5 to 1. This research emphasizes the considerable potential of supercapacitor-grade NiCoCu LDH/Ag-citrate-PANI-f-SWCNTs nanocomposites for superior rate performance, robust cycle stability, and enhanced energy storage capacity.
超级电容器凭借其卓越的功率密度和长期的循环稳定性，极大地改变了先进储能设备的格局。然而，它们的能量密度仍然较低，需要开展研究以与传统电池储能设备竞争。本研究通过探索层状双氢氧化物（LDH）与高导电材料的整合，来开发一种创新的储能系统，从而解决储能技术中能量密度和功率密度之间的差异。使用NiCoCu LDH、柠檬酸银、聚苯胺和f-SWCNT通过水热法制备了四个电极。最佳电极表现出优异的电化学性能；在0.5 A g时，其比电容为807 F g，是纯样品的两倍。构建的不对称超级电容器器件的能量密度分别为62.15 W h kg和22.44 W h kg，对应的功率密度分别为1275 W kg和11900 W kg。此外，它在4000次充放电循环中保持了100%的循环稳定性和95%的库仑效率。幂律研究强化了混合级超级电容器的概念，该研究揭示的值在0.5至1的区间内。本研究强调了超级电容器级NiCoCu LDH/柠檬酸银-聚苯胺-f-SWCNT纳米复合材料在优异倍率性能、强大循环稳定性和增强储能容量方面的巨大潜力。
