Enhanced Aluminum-Ion Storage Properties of N-Doped Titanium Dioxide Electrode in Aqueous Aluminum-Ion Batteries

• Published in: Nanomaterials (Basel, Switzerland) Vol. 14; no. 5; p. 472
• Main Authors: Jian, Le, Wu, Xibing, Li, Ruichun, Zhao, Fangzheng, Liu, Peng, Wang, Feng, Liu, Daosheng, Yao, Qingrong, Deng, Jianqiu
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 05-03-2024; MDPI
• Subjects: Aluminum; Aluminum-ion batteries; Analysis; anode; Anodes; aqueous aluminum-ion batteries; Aqueous solutions; Batteries; Carbon; Charge transfer; Chemical synthesis; Composite materials; Crystal structure; Discharge capacity; Electric properties; Electrochemistry; Electrode materials; Electrodes; Electrolytes; Electrons; Energy storage; Fourier transforms; Investigations; Ion storage; Lithium; Low resistance; Mechanical properties; Methods; Microscopy; Nanoparticles; Nitrogen; nitrogen-doping; rate performance; Sol-gel processes; Spectrum analysis; Storage systems; Titanium; Titanium dioxide; United States > US; Japan; rate performance; anode; titanium dioxide; aqueous aluminum-ion batteries; nitrogen-doping
• ISSN: 2079-4991; 2079-4991
• DOI: 10.3390/nano14050472

Aqueous aluminum-ion batteries (AIBs) have great potential as devices for future large-scale energy storage systems due to the cost efficiency, environmentally friendly nature, and impressive theoretical energy density of Al. However, currently, available materials used as anodes for aqueous AIBs are scarce. In this study, a novel sol-gel method was used to synthesize nitrogen-doped titanium dioxide (N-TiO
) as a potential anode material for AIBs in water. The annealed N-TiO
showed a high discharge capacity of 43.2 mAh g
at a current density of 3 A g
. Analysis of the electrode kinetics revealed that the N-TiO
anodes exhibited rapid diffusion of aluminum ions, low resistance to charge transfer, and high electronic conductivity, enabling good rate performance. The successful implementation of a nitrogen-doping strategy provides a promising approach to enhance the electrochemical characteristics of electrode materials for aqueous AIBs.