Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Sendai 980-8577, Japan.
Nano Lett. 2012 Mar 14;12(3):1146-51. doi: 10.1021/nl202681b. Epub 2012 Feb 17.
Novel ultrathin Li(2)MnSiO(4) nanosheets have been prepared in a rapid one pot supercritical fluid synthesis method. Nanosheets structured cathode material exhibits a discharge capacity of ~340 mAh/g at 45 ± 5 °C. This result shows two lithium extraction/insertion performances with good cycle ability without any structural instability up to 20 cycles. The two-dimensional nanosheets structure enables us to overcome structural instability problem in the lithium metal silicate based cathode materials and allows successful insertion/extraction of two complete lithium ions.
新型超薄 Li(2)MnSiO(4) 纳米片通过快速一锅超临界流体合成法制备而成。纳米片结构的正极材料在 45±5°C 时的放电容量约为 340 mAh/g。该结果表明，在 20 次循环内，具有良好的循环能力，没有任何结构不稳定性，可进行两次锂的提取/插入。二维纳米片结构使我们能够克服基于锂硅酸盐的正极材料中的结构不稳定性问题，并允许两个完整的锂离子成功插入/提取。
