Materials and Energy Research Center (MERC) Iranian Ceramic Society (ICERS) Advanced Ceramics Progress 2423-7477 7 2 2021 06 01 Pseudocapacitive Behavior of Nb2O5-TNTs Nanocomposite for Lithium-ion Micro-batteries 1 9 132234 10.30501/acp.2021.289093.1064 EN M. Mohammadifar MS, Department of Semiconductors, Materials and Energy Research Center (MERC), Meshkindasht, Alborz, Iran 0000-0001-9516-8890 A. Massoudi Assistant Professor, Department of Semiconductors, Materials and Energy Research Center (MERC), Meshkindasht, Alborz, Iran 0000-0002-4203-7376 N. Naderi Associate Professor, Department of Semiconductors, Materials and Energy Research Center (MERC), Meshkindasht, Alborz, Iran 0000-0002-4071-5516 M. J. Eshraghi Associate Professor, Department of Semiconductors, Materials and Energy Research Center (MERC), Meshkindasht, Alborz, Iran 0000-0001-9432-3596 Journal Article 2021 06 04 The present study aims to introduce Niobium pentoxide-Titanium nanotube (Nb₂O₅-TNTs) composite as a novel anode material synthesized through hydrothermal method. In this respect, Nb₂O₅ nanoparticles and TNTs are separately synthesized through sonochemical and anodizing processes, respectively. According to FESEM images, the well-oriented TNTs with inner and outer diameters of 70 and 88 nm, respectively, are well decorated by Nb₂O₅ nanoparticles. The Nb₂O₅-TNTs anode shows the areal charge and discharge capacities of 0.167 mAh/cm² and 0.146 mAh/cm², respectively, at 0.113 mA/cm² as well as 60% capacitive storage in 20 mV/s. High power Nb₂O₅-TNT anode reveals 86% reversible capacity in the 16^th cycle with a columbic efficiency of 84% for the 16^th cycle. In addition, the charge transfer resistance in TNTs declines from 750 Ω to 680 Ω after decorating by Nb₂O₅. The superior performance of Nb₂O₅-TNT composites is taken into account to derive higher charge storage from a capacitive charge storage which is dominant in the diffusion-controlled process. Therefore, Nb₂O₅-TNT composite can be applied to the next-generation pseudocapacitive anode in lithium-ion batteries. https://www.acerp.ir/article_132234_2d6c9ea0d4e57bea0bfbed02521237cc.pdf