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Self-sacrificing template method to controllable synthesize hollow SnO2@C nanoboxes for lithium-ion battery anode
Journal of Electroanalytical Chemistry ( IF 4.1 ) Pub Date : 2021-08-28 , DOI: 10.1016/j.jelechem.2021.115653
Qingshan Dai 1 , Cuiping Gu 1 , Yayun Xu 1 , Yang Zhang 2 , Yong Hong 1 , Sang Woo Joo 3 , Jiarui Huang 1
Affiliation  

A self-sacrificing template method is a common and straightforward way to synthesize hollow nanomaterials. In this study, a self-sacrificing template method was used for the facile preparation of well-defined hollow SnO2@C nanoboxes. CaSn(OH)6 nanocubes, as sacrificial templates, reacted with glucose under hydrothermal conditions to synthesize hollow SnO2 nanoboxes. The surface of the hollow SnO2 nanoboxes via the carbonization of polydopamine, resulting in hollow SnO2@C nanoboxes. The electrochemical performance test confirmed the excellent rate performance (806.5, 785.0, 718.8, 612.4, and 297.8 mA h g−1 at 0.1, 0.2, 0.5 1.0, and 2.0 A g−1, respectively) and outstanding reversible capacity (786.9 mAh g−1 after 100 cycles) of the hollow SnO2@C nanoboxes. The carbon-coated hollow structured SnO2 nanoboxes provide buffer space for volume expansion, high electrolyte contact area, and short ion transfer path, resulting in improved cycling stability and rate performance.



中文翻译:

自牺牲模板法可控合成锂离子电池负极用空心SnO2@C纳米盒

自牺牲模板法是合成中空纳米材料的一种常见且直接的方法。在这项研究中,自我牺牲模板方法被用于轻松制备明确定义的空心 SnO 2 @C 纳米盒。CaSn(OH) 6纳米立方体作为牺牲模板,在水热条件下与葡萄糖反应合成空心SnO 2纳米盒。中空 SnO 2纳米盒的表面通过聚多巴胺的碳化,产生中空 SnO 2 @C 纳米盒。电化学性能测试证实了优异的倍率性能(806.5、785.0、718.8、612.4 和 297.8 mA h g -1在0.1、0.2、0.5 1.0 和 2.0 A g -1分别)和中空 SnO 2 @C 纳米盒的出色可逆容量(100 次循环后为786.9 mAh g -1)。碳涂层中空结构的 SnO 2纳米盒为体积膨胀、高电解质接触面积和短离子传输路径提供缓冲空间,从而提高循环稳定性和倍率性能。

更新日期:2021-09-03
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