Yazar "Mushtaq, Muhammad Waheed" seçeneğine göre listele

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    Öğe
    Improved electrochemical performance of nitrogen-containing copper-based 1D metal organic framework derived from highly connective pyridine-2,4,6-tricarboxylic acid for hybrid supercapacitors
    (Royal Soc Chemistry, 2025) Shahbaz, Muhammad; Sharif, Shahzad; Mushtaq, Muhammad Waheed; Ghaznazvi, Zainab; Iqbal, Zaeema; Khurshid, Muhammad Aqib; Sahin, Onur
    Metal organic frameworks (MOFs) are promising candidates for emergent energy storage devices due to their intrinsic properties, such as rich porosity, variable nano-geometries, and multifunctional characteristics. Here, we report the synthesis of copper-based MOFs (Cu-PTA-MOF), polyaniline (PANI), and polypyrrole (PPY), which have been characterized using different techniques. Pyridine-2,4,6-tricarboxylic acid (PTA) ligands were connected by metal ions through pi-d conjugated layers to generate the 1D polymer. Electrochemical attributes of Cu-PTA-MOF@AC, Cu-PTA-MOF@PANI and Cu-PTA-MOF@PPY were explored using a three-electrode assembly with 1 M KOH. Cu-PTA-MOF@PANI exhibited good results. For practical application, it was coupled with an activated carbon electrode in a hybrid supercapacitor device. The device exhibits a specific capacity of 232 C g-1, 72.5 W h kg-1 energy density and 4500 W kg-1 power density at 0.5 A g-1 current density with a coulombic efficiency of 98.8% even after 10 000 GCD cycles. The conductive polymer endowed the material with rapid ion and electron transfer and allowed utilization of the active material in a hybrid supercapacitor.
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    Öğe
    Tuning the electrochemical performance of a copper-based 2D rectangular layered metal organic framework by incorporating reduced graphene oxide and polyaniline
    (Royal Soc Chemistry, 2026) Riasat, Madiha; Shahbaz, Muhammad; Ullah, Ghulam; Mushtaq, Muhammad Waheed; Saeed, Maham; Shahzad, Sundas; Shahzad, Ayesha
    To meet the challenge of developing efficient energy storage devices, metal organic frameworks (MOFs) with intrinsic properties have emerged as promising candidates. The conductivity and stability of the extended 1D pi-d and pi-pi stacking in a 2D MOF can be further enhanced by fabricating its composite with conductive materials. Herein, a nitrogen-containing 2D Cu-PDA MOF was synthesized and mixed with conductive materials, such as reduced graphene oxide (rGO) and polyaniline (PANI), to enhance the electrical conductivity. After structural investigation, the electrochemical attributes of Cu-PDA and its composites (Cu-PDA@rGO and Cu-PDA@PANI) have been explored by utilizing different electroanalytical techniques like CV, GCD and EIS analyses. In a three-electrode assembly, Cu-PDA@rGO shows a specific capacity of 551.31 C g-1. Hence, for practical applications, a hybrid supercapacitor has been designed by fabricating Cu-PDA@rGO against activated carbon (AC), which reveals a specific capacity of 159.4 C g-1, a specific energy of 32.10 Wh kg-1 and a specific power of 180.17 W kg-1 while maintaining a coulombic efficiency of 99.4% even after 5000 GCD cycles. These excellent findings demonstrate that Cu-PDA@rGO is a potential candidate for future energy storage devices.