Exploring Mg and Fe co-doped Li4Ti5O12 electrode for lithium-ion battery

• Published in: Materials chemistry and physics Vol. 329; p. 129939
• Main Authors: Priyono, Bambang, Faizah, Faizah, Lestari, Kiki Rezki, Sofyan, Nofrijon, Alfaruqi, Muhammad Hilmy, Kim, Jaekook, Syahrial, Anne Zulfia
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.01.2025
• Subjects: Co-doping strategy; Density functional theory; Lithium titanate; Lithium-ion battery; Lithium-ion battery; Lithium titanate; Density functional theory; Co-doping strategy
• ISSN: 0254-0584
• DOI: 10.1016/j.matchemphys.2024.129939

Li4Ti5O12 (LTO) has been a great subject in lithium-ion battery research due to its high safety and electrochemical stability. However, the exploration of novel doping strategies to enhance its electrochemical performance remains a topic of interest. While single doping strategies have been widely investigated, co-doping strategies involving multiple dopants have only received limited attention. Here, we investigate the performance improvement of LTO through an Mg- and Fe-co-doping strategy. Fe precursors derived from steel manufacturing waste were used as dopants. Experimental results reveal that the co-doped samples exhibit enhanced capacity, cycleability, and rate capability. The theoretical analysis also provides valuable information on the electronic and structural changes induced by Mg- and Fe-co-doping, elucidating the impact on lithium-ion diffusion and storage. This approach contributes to the sustainable utilization of industrial waste and offers a low-cost method for the improvement of electrode materials. [Display omitted] •Mg- and Fe co-doping improves capacity, cycleability, and rate capability of LTO.•The enhanced LTO performance are due to improved electronic and ionic transport.•Fe precursors from steel waste offer sustainable and low-cost electrode development.