Hollow core-shell mesospheres of crystalline SnO2 nanoparticle aggregates for high capacity Li+ ion storage
Hollow core-shell mesospheres of crystalline SnO2 nanoparticle aggregates for high capacity Li+ ion storage
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DOI：
10.1021/cm7030575
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发表时间：
2008-03-11
影响因子：
8.6
通讯作者：
Lee, Jim Yang
中科院分区：
文献类型：
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作者：
Deng, Da;Lee, Jim Yang
通过简单、环保的溶剂热合成和合成后煅烧工艺，成功地将晶体氧化锡纳米颗粒组装成中空核壳介球的高阶纳米结构。采用适当配方的水-乙醇混合物，通过锡和碳前驱体的溶剂热合成，形成了负载SnO2晶体纳米颗粒的碳介球。随后的煅烧将SnO2纳米颗粒压缩成稳定的空心核壳球。在除碳过程中，内球中的碳对最终产物的形态起到了模板化的作用。该方法制备简单，成本低，易于规模化生产。这种独特的SnO2纳米结构可以储存大量的Li+，并且作为相纯SnO2阳极可以很好地循环。
Crystalline SnO2 nanoparticles were successfully assembled into a higher-order nanostructure of hollow core-shell mesospheres by a simple and environmentally benign procedure consisting of solvothermal synthesis and postsynthesis calcination. Carbon mesospheres laden with crystalline SnO2 nanoparticles were formed, using a suitably formulated water-ethanol Mixture, as the sole product of solvothermal synthesis from tin and carbon precursors. Subsequent calcination compressed the SnO2 nanoparticles into stable hollow core-shell rnesospheres. The carbon in the inesospheres played the constructive role of templating the final product morphology during the carbon removal process. This method of preparation is simple, low cost, and could be conveniently scaled LIP for volume production. This unique SnO2 nanostructure could store an exceedingly large amount of Li+, and it cycled well as a phase-pure SnO2 anode.