Highly effective Al-doped titanium niobate porous anode material for rechargeable high-rate Li-ion storage performance

• Published in: Journal of the Taiwan Institute of Chemical Engineers Vol. 131; p. 104187
• Main Authors: Muruganantham, Rasu, Lin, Mei-Chun, Wang, Po Kai, Chang, Bor Kae, Liu, Wei-Ren
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2022
• Subjects: Aluminium; Anode; Doping; First principle; Li-ion batteries; TiNb2O7; TiNb2O7; Aluminium; Anode; Li-ion batteries; First principle; Doping
• ISSN: 1876-1070; 1876-1089
• DOI: 10.1016/j.jtice.2021.104187

•The Al3+-substitutional doped TiNb2O7 material is prepared by a facile solvothermal method with calcination process.•Al3+-doped TiNb2O7 is used as an anode for the first time for LIBs.•Li-ion half-cell preserved a discharge capacity of 155 mAh g−1 after 250 cycles at 5 C.•Theoretical calculations of bare and doped-TiNb2O7 are demonstrated. Titanium and Niobium-based oxides are served as safety and more stable intercalation type potential anode materials for Li-ion batteries. In this work, we synthesize pristine titanium niobate (TiNb2O7, as denoted TNO) and novel aluminium doped TNO (Al-TNO) mesoporous materials via a facile solvothermal method for lithium-ion rechargeable batteries anode. The effect of Al-doping into the TNO crystal structure, physico-chemical properties and electrochemical performance are systematically analyzed. The optimized Ti0.95Al0.05Nb2O7 sample exhibits higher Li-ion storage performance. The observed initial specific capacity is 283 mAh g−1 at 0.1 C and sustains 155 mAh g−1 after 250 cycles at a current rate of 5 C. Whereas, the pristine TiNb2O7 exhibits initial discharge capacity of 278 mAh g−1 at 0.1 C and maintains 118 mAh g−1 after 250 cycles at 5 C. The resultant Al-TNO leads to enhance the conductivity and facilitate the fast Li-ion kinetics behaviours. Therefore, Al-doped TNO electrode cell revealed a higher electrochemical performance than that of pristine TNO electrode. Hence, this work provides an effective manner to improve the high-performance anode materials for Li-ion high-energy storage applications. [Display omitted]