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Rosaiah Pitcheri,Divya Ponnusamy,Sambasivam Sangaraju,Tighezza Ammar M.,Kalaivani V.,Muthukrishnaraj A.,Ayyar Manikandan,Niyitanga Theophile,Kim Haekyoung 한국탄소학회 2024 Carbon Letters Vol.34 No.1
Synthesis of extremely competent materials is of great interest in addressing the energy storage concerns. Manganese oxide nanowires (MnO2 NWs) are prepared in situ with multiwall carbon nanotubes (MWCNT) and graphene oxide (GO) using a simple and effective hydrothermal method. Powder XRD, Raman and XPS analysis are utilized to examine the structural characteristics and chemical state of composites. The initial specific discharge capacity of pure MnO2 NWs, MnO2 NWs/MWCNT and MnO2 NWs/rGO composites are 1225, 1589 and 1685 mAh/g, respectively. The MnO2 NWs/MWCNT and MnO2 NWs/rGO composites showed stable behavior with a specific capacity of 957 and 1108 mAh/g, respectively, after 60 cycles. Moreover, MnO2 NWs/rGO composite sustained a specific capacity of 784 mAh/g, even after 250 cycles at a current density of 1 A/g showing outstanding cycling stability.
Lakshmi C. Bhagya,Venus S. Anna,Velanganni S.,Muthukrishnaraj A.,Ayyar Manikandan,Henini Mohamed 한국탄소학회 2024 Carbon Letters Vol.34 No.1
Recently, dye-sensitized solar cells (DSSCs) can be seen as a talented alternate to the conservative photovoltaic strategies and has fascinated significant consideration as they offer the opportunity for low-cost and also high alteration photovoltaic (PV) energy [1,2,3]. Over the last decade, researchers have concentrated on developing a photoanode (working electrode) with a diversity of morphologies in order to expand the proficiency of DSSCs. TiO2 is the greatest often active photoanode substantial in DSSCs, owing to its porosity and durable catalytic nature. Recently discovered interface properties such as charge departure, converse recombination, and tricking of photogenerated electrons in semiconductor device outsides self-sufficiently by defining optimal material mixtures and their gathering [4, 5]. To maximize overall energy conversion efficiency (ECE), it is essential to construct a combination of materials consisting of various metal oxide semiconductors (MOS) that reduces recombination currents, improves light absorption, ensures a good electric connection.