(Sn, Ti)O2 solid solution: Mechanically reinforced SnO2@TiO2@C anode for cycle stability of lithium-ion batteries

Jinpeng Yin*, Xiaolin Li, Guanqin Wang, Dongqing Kong, Chuang Li, Dongbai Xie, Yangyang Yan, Ning Li, Qiang Li

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

摘要

Among the various materials investigated for use as anodes in lithium-ion batteries (LIBs), SnO2 faces the significant challenge of substantial volume expansion, severely limiting its practical applications. To address this issue, this paper uses a simple co-precipitation method to synthesize ultrafine SnO2 and TiO2 encapsulated in cross-linked porous carbon (SnO2@TiO2@C), in which SnO2 acts as the primary active material. At the same time, TiO2 functions as a mechanical buffer to mitigate the large volume expansion of SnO2. Additionally, developing (Sn, Ti)O2 solid solution at the interface between TiO2 and SnO2 significantly enhances the bonding between these components, effectively preventing their separation. The cross-linked carbon enhances the conductivity of the SnO2@TiO2@C. The combination of TiO2 and cross-linked carbon produces a synergistic effect that enhances the remarkable cycling performance of SnO2@TiO2@C (769.1 mAh/g after 100 cycles at 0.2 A/g), impressive rate performance (422.3 mAh/g at a discharge rate of 10 A/g) and extended cycle life (403.6 mAh/g after 2000 cycles at 5 A/g). Moreover, this study examined how various ratios of SnO2 and TiO2 influence the electrochemical performance of SnO2@TiO2@C.

源语言英语
文章编号145073
期刊Electrochimica Acta
507
DOI
出版状态已出版 - 10 12月 2024
已对外发布

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Yin, J., Li, X., Wang, G., Kong, D., Li, C., Xie, D., Yan, Y., Li, N., & Li, Q. (2024). (Sn, Ti)O2 solid solution: Mechanically reinforced SnO2@TiO2@C anode for cycle stability of lithium-ion batteries. Electrochimica Acta, 507, 文章 145073. https://doi.org/10.1016/j.electacta.2024.145073