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A high performance SnO₂/C nanocomposite cathode for aluminum-ion batteries

Lu, Hongyan, Wan, Yuanxin, Wang, Tianyi, Jin, Rong, Ding, Peitao, Wang, Rong, Wang, Yong, Teng, Chao, Li, Linling, Wang, Xiaoliang, Zhou, Dongshan, Xue, Gi
Journal of materials chemistry A 2019 v.7 no.12 pp. 7213-7220
aluminum, batteries, carbon, cathodes, chemistry, nanocomposites, nanomaterials, tin dioxide
Rechargeable aluminum-ion batteries have been researched extensively due to their attractive features, such as the abundant aluminum resources and high capacity resulting from the three-electron redox properties. Herein, a porous carbon supported SnO₂ nanocomposite is reported as a cathode material for AIBs. The resultant cell exhibits a high discharge specific capacity of 370 mA h g⁻¹ (with an initial value of 434 mA h g⁻¹) at 50 mA g⁻¹. In the cycling performance, the cell retains a stabilized discharge capacity of 72 mA h g⁻¹ after 20 000 cycles with a coulombic efficiency of ∼100% under an ultrahigh current density of 2 A g⁻¹. Owing to the well-defined nanostructure, side reactions and pulverization of active particles can be prevented. The results indicate that the SnO₂/C nanocomposite is a favorable cathode material for AIBs and opens up a new opportunity for the design of high-performance AIBs.