Shahbaz Muhammad, Sharif Shahzad, Rehman Afzal Tayyaba Tur, Iqbal Zaeema, Ghaznazvi Zainab, Saeed Maham, Shahzad Ayesha, Bentalib Abdulaziz, Jumah Abdulrahman Bin, Hussain Sajjad
Materials Chemistry Laboratory, Institute of Chemical Sciences, Government College University Lahore 54000 Pakistan
Department of Chemical Engineering, College of Engineering, King Saud University P.O. Box 800 Riyadh 11421 Saudi Arabia.
RSC Adv. 2025 Jun 2;15(23):18142-18157. doi: 10.1039/d5ra01490e. eCollection 2025 May 29.
The scarcity of efficient energy storage devices (ESDs) demands the design of hybrid supercapacitors that integrate the properties of batteries and supercapacitors into one unit. Amongst the various known electrode materials, metal-organic frameworks (MOFs), due to their high porosity and unique electrochemical features, have come forward to boost the electrochemical performance of ESDs. However, the low conductivity of MOFs hinders their practical applications, and researchers are trying to address this issue by designing various strategies that unlock their extraordinary potential. In this work, the conductivity of Ce-PTA-MOF derived from cerium and pyridine-2,4,6-tricarboxylic acid was tweaked by using different amounts of reduced graphene oxide (rGO). Analysis of the electrochemical performance in a three-electrode set up showed that the composite of Ce-PTA-MOF and rGO with a 1 : 2 ratio possessed a significant specific capacity of 689.56 C g which indicated its suitability for use in practical applications. Hence, a hybrid supercapacitor was fabricated from Ce-PTA-MOF@rGO and activated carbon (AC) which exhibited a specific capacity of 380.83 C g, a specific energy of 74 W h kg and a specific power of 434 W kg at 0.5 A g. A coulombic efficiency of 99% was recorded even after 5000 GCD cycles. The remarkable stability and high specific energy and power density proved that this synthesized composite is a viable option for use in future energy storage devices.
高效储能设备（ESD）的稀缺促使人们设计混合超级电容器，将电池和超级电容器的特性集成到一个单元中。在各种已知的电极材料中，金属有机框架（MOF）由于其高孔隙率和独特的电化学特性，已被提出用于提升ESD的电化学性能。然而，MOF的低导电性阻碍了它们的实际应用，研究人员正试图通过设计各种策略来挖掘其非凡潜力，以解决这一问题。在这项工作中，通过使用不同量的还原氧化石墨烯（rGO）来调节由铈和吡啶 - 2,4,6 - 三羧酸衍生的Ce - PTA - MOF的导电性。在三电极装置中对其电化学性能的分析表明，Ce - PTA - MOF与rGO比例为1∶2的复合材料具有689.56 C g的显著比容量，这表明其适用于实际应用。因此，由Ce - PTA - MOF@rGO和活性炭（AC）制备了一种混合超级电容器，在0.5 A g时其比容量为380.83 C g，比能量为74 W h kg，比功率为434 W kg。即使在5000次恒流充放电循环后，库仑效率仍记录为99%。其卓越的稳定性以及高比能量和功率密度证明，这种合成复合材料是未来储能设备的可行选择。
