Facile synthesis and Li-storage performance of SnO nanoparticles and microcrystals
Facile synthesis and Li-storage performance of SnO nanoparticles and microcrystals
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DOI：
10.1039/c2ra22867j
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发表时间：
2013-02
期刊：
影响因子：
3.9
通讯作者：
C. Cherian;M. Reddy;Sow Chorng Haur;B. Chowdari
中科院分区：
文献类型：
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作者：
C. Cherian;M. Reddy;Sow Chorng Haur;B. Chowdari
用简单的化学方法制备了纳米和微米级SnO样品，并对它们的锂循环行为进行了研究和比较。以SnF2为原料，采用水溶液合成法合成了堆积网状结构的SnO微晶。以SnCl2、Na2CO3和氯化钠为原料，采用高能球磨法制备了SnO纳米颗粒聚集体。用X射线衍射仪、扫描电子显微镜和高分辨电子显微镜对化合物进行了表征。在电流密度为50 mA g−1，电流密度为50 mA g−1，电压范围为0.005~0.8V vs.Li的恒流循环研究中，微SnO的初始可逆容量为790 mA h g SnO 1，5-50次循环的容量保持率为43%。在相似的循环条件下，纳米SnO的可逆放电容量为738 mA h g−1，5~50次循环的容量保持率为77%。高能球磨技术可用于大规模合成SnO纳米颗粒，作为负极材料具有新颖的电化学性能。
Nano- and micron-sized SnO samples are prepared by simple chemical methods and their lithium cycling behavior is investigated and compared. SnO microcrystals with stacked mesh like morphology are prepared from SnF2 by an aqueous solution synthetic route. SnO nanoparticle-aggregates are prepared from SnCl2, Na2CO3 and NaCl by high energy ball milling. The compounds are characterized by X-ray diffraction, SEM and HRTEM techniques. Galvanostatic cycling studies at a current density of 50 mA g−1 in the voltage range 0.005–0.8 V vs. Li, showed that the micro-SnO has an initial reversible capacity of 790 mA h g−1 with capacity retention of 43% between 5–50 cycles. Under similar cycling conditions, nano-SnO showed a reversible discharge capacity of 738 mA h g−1 with much better capacity retention of 77% between 5–50 cycles. High energy ball milling technique can be adopted for the large scale synthesis of SnO nanoparticles which show novel electrochemical performance as anode material.