Ultrafine SnO2 anchored in ordered mesoporous carbon framework for lithium storage with high capacity and rate capability

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Vol. 406; p. 126710
• Main Authors: Liu, Dongdong, Wei, Zengyan, Liu, Liming, Pan, Hong, Duan, Xiaoming, Xia, Long, Zhong, Bo, Wang, Huatao, Jia, Dechang, Zhou, Yu, Huang, Xiaoxiao
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.02.2021
• Subjects: Anode; Lithium ion battery; Ordered mesoporous structure; Tin oxide; Ordered mesoporous structure; Lithium ion battery; Anode; Tin oxide
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2020.126710

•SnO2 NPs anchored in ordered mesoporous carbon were prepared for the first time.•The unique ordered mesoporous structure shortens the diffusion path of Li+.•The SnO2@OMC shows high capacity and rate capability.•Analyze the relationship between order and electrochemical performance. Improving the reversible capacity and sluggish reaction kinetics of SnO2-based anodes have attracted considerable attention. Herein, an effective strategy by anchoring ultrafine (~5 nm) and high content SnO2 nanoparticles (~90%) in ordered mesoporous carbon framework (SnO2@OMC) is proposed to advance anode materials in lithium ion batteries. The ultrafine SnO2 and ordered mesoporous, which not only shorten the diffusion distance of Li+ and decrease the polarization, but also enhance the conversion reaction of SnO2 and interfacial storage of Li+. Benefiting from the novel strategy and elaborate design, the obtained SnO2@OMC anodes deliver a high reversible capacity (930 mAh g−1 after 150 cycles at 0.2 A g−1) and excellent rate capabilities (321 mAh g−1 at 5 A g−1). After assessment of the rate capability, SnO2@OMC anodes still display stable capacity.