Wolframite-type ZnWO4 Nanorods as New Anodes for Li-Ion Batteries

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• 作者：Hyun-Woo Shim ; In-Sun Cho ; Kug Sun Hong ; Ah-Hyeon Lim ; Dong-Wan Kim
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：August 18, 2011
• 年：2011
• 卷：115
• 期：32
• 页码：16228-16233
• 全文大小：976K
• 年卷期：v.115,no.32(August 18, 2011)
• ISSN：1932-7455

文摘

A divalent wolframite-structure zinc tungstate (ZnWO₄) was synthesized using a facile hydrothermal process at 180 掳C, with pH adjustment to drive the preferential growth along the [100] direction, resulting in the formation of one-dimensional nanorods. The resulting nanorods were characterized in detail using X-ray diffraction, Raman spectroscopy, field-emission scanning electron microscopy, high-resolution transmission electron microscopy, energy-dispersive X-ray analysis, and Brunauer鈥揈mmett鈥揟eller measurements. In addition, the Li electroactivities of the ZnWO₄ nanorods were investigated using cyclic voltammetry and galvanostatic cycling. The ZnWO₄ nanorods could deliver reversibly sustained high capacities of over 420 mAh g^鈥? after 150 cycles, which are much higher than those of graphite-based anodes.