Synthesis of mesoporous copper oxide microspheres with different surface areas and their lithium storage properties
Synthesis of mesoporous copper oxide microspheres with different surface areas and their lithium storage properties
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不同表面积介孔氧化铜微球的合成及其储锂性能
DOI：
10.1016/j.jpowsour.2012.05.088
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发表时间：
2012-11
影响因子：
9.2
通讯作者：
Su, Fabing
中科院分区：
文献类型：
--
作者：
Zhang, Zailei;Chen, Han;She, Xilin;Sun, Jin;Teo, Jaclyn;Su, Fabing
本文报道了不同表面积的介孔氧化铜（Cu2O和CuO）微球作为负极材料在锂离子电池中的电化学应用对比研究。采用水热法合成了粒径分布较窄的介孔Cu2O微球，并通过Cu2O的后续氧化得到CuO。合成的介孔Cu2O和CuO微球的表面积分别为12.7 ~ 65.8和5.2 ~ 37.6 m2²−1，平均晶粒尺寸分别为15.0 ~ 20.5和10.4 ~ 15.9 nm。结果表明，高表面积的介孔Cu2O和CuO微球比低表面积的介孔Cu2O和CuO微球具有更高的容量和更好的循环性。表面面积分别为65.8和37.6 m2g - 1的介孔Cu2O和CuO微球的初始充电容量分别为430.5 mAh g - 1和601.6 mAh g - 1，在0.1 C下循环50次后的充电容量分别高达355.2 mAh g - 1和569.8 mAh g - 1。这是因为高度发达的介孔结构可以增强锂离子的容纳能力，缩短锂离子的扩散距离，增加对电解质的吸收。
We report the comparative investigation on the electrochemical application of mesoporous copper oxide (Cu2O and CuO) microspheres with different surface areas as anode materials in Li-ion batteries. Mesoporous Cu2O microspheres with a narrow particle size distribution are synthesized by a hydrothermal method and CuO is obtained by subsequent oxidation of Cu2O. The synthesized mesoporous Cu2O and CuO microspheres possess a surface area of 12.7–65.8 and 5.2–37.6 m2g−1and an average crystal size of 15.0–20.5 and 10.4–15.9 nm, respectively. The result reveals that the mesoporous Cu2O and CuO microspheres with a higher surface area show a higher capacity and better cyclability than those with a lower surface area. The mesoporous Cu2O and CuO microspheres with a surface area of 65.8 and 37.6 m2g−1show an initial charge capacity of 430.5 mAh g−1and 601.6 mAh g−1and deliver a capacity as high as 355.2 mAh g−1and 569.8 mAh g−1at 0.1 C after 50 cycles, respectively. This is because the highly developed mesoporous structure can enhance the accommodation of lithium ions, shorten the diffusion distance for lithium ions, and increase the absorption of electrolyte.
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影响因子：
6
作者：
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