Sn-LiTiO/C as a promising cathode material with a large capacity and high rate performance for Mg-Li hybrid batteries

• Published in: Dalton transactions : an international journal of inorganic chemistry Vol. 53; no. 5; pp. 255 - 264
• Main Authors: Lin, Wei, Zuo, Xingwei, Ma, Chao, Xia, Peng, Bian, Haowei, Liang, Guobing, Hu, Jianbing, Song, Zhongcheng, Mao, Wutao, Bao, Keyan
• Format: Journal Article
• Published: 30.01.2024
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/d3dt02502k

The development prospects of conventional Li-ion batteries are limited by the paucity of Li resources. Mg-Li hybrid batteries (MLIBs) combine the advantages of Li-ion batteries and magnesium batteries. Li + can migrate rapidly in the cathode materials, and the Mg anode has the advantage of being dendrite-free. In this study, a type of Li 4 Ti 5 O 12 composite material doped with Sn 4+ and a conductive carbon skeleton (Li 4 Ti 4.9 Sn 0.1 O 12 /C, Sn 0.1 -LTO/C) was prepared by a simple one-pot sol-gel method. The doped Sn 4+ replaces part of Ti 4+ in the crystal lattice, which makes Ti 3+ require charge compensation, thus improving the ionic conductivity. The intervention of the conductive carbon skeleton further improves the conductivity of the Sn 0.1 -LTO/C composite material. The performance of Sn 0.1 -LTO/C as the cathode of MLIBs is explored. The initial discharge capacity was 159.1 mA h g −1 at 0.5 C, and it was maintained at 105 mA h g −1 even after 500 cycles. The excellent electrochemical performance is attributed to a small amount of Sn doping and the involvement of the conductive carbon skeleton, which indicated that the Sn 0.1 -LTO/C composite material provides great potential application in MLIBs. The development prospects of conventional Li-ion batteries are limited by the paucity of Li resources.