Center for Nanoparticle Research, Institute for Basic Science , Seoul 151-742, Republic of Korea.
Beamline Department, Pohang Accelerator Laboratory , Pohang 790-784, Republic of Korea.
ACS Appl Mater Interfaces. 2015 Nov 25;7(46):25725-32. doi: 10.1021/acsami.5b07075. Epub 2015 Nov 13.
Hollow nanostructured materials have attracted considerable interest as lithium ion battery electrodes because of their good electrochemical properties. In this study, we developed a general procedure for the synthesis of hollow nanostructured metal silicates via a hydrothermal process using silica nanoparticles as templates. The morphology and composition of hollow nanostructured metal silicates could be controlled by changing the metal precursor. The as-prepared hierarchical hollow nanostructures with diameters of ∼100-200 nm were composed of variously shaped primary particles such as hollow nanospheres, solid nanoparticles, and thin nanosheets. Furthermore, different primary nanoparticles could be combined to form hybrid hierarchical hollow nanostructures. When hollow nanostructured metal silicates were applied as anode materials for lithium ion batteries, all samples exhibited good cyclic stability during 300 cycles, as well as tunable electrochemical properties.
中空纳米结构材料因其良好的电化学性能而被广泛应用于锂离子电池电极。在本研究中，我们开发了一种通过水热法以二氧化硅纳米颗粒为模板合成中空纳米结构金属硅酸盐的通用方法。通过改变金属前驱体，可以控制中空纳米结构金属硅酸盐的形态和组成。所制备的具有 ∼100-200nm 直径的分级中空纳米结构由各种形状的初级颗粒组成，如中空纳米球、实心纳米颗粒和薄纳米片。此外，不同的初级纳米颗粒可以组合形成混合分级中空纳米结构。当中空纳米结构金属硅酸盐作为锂离子电池的阳极材料时，所有样品在 300 次循环中都表现出良好的循环稳定性，以及可调的电化学性能。
