Characteristics of LiCoO2 thin film cathodes according to the annealing ambient for the post-annealing process
Characteristics of LiCoO2 thin film cathodes according to the annealing ambient for the post-annealing process
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DOI：
10.1016/j.jpowsour.2004.02.035
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发表时间：
2004-07
影响因子：
9.2
通讯作者：
Wooseong Kim
中科院分区：
文献类型：
--
作者：
Wooseong Kim
为了获得晶体LiCoO 2阴极，分别在Ar和O2气氛下，在650-900°C的温度范围内对使用溅射系统生长的原样非晶LiCoO 2阴极进行退火。然后系统地比较所得阴极的充放电性能。O2气氛下的后退火工艺导致在高温下比Ar气氛下的上级循环性能和热稳定性。这种效果进行了讨论，在晶界，表面粗糙度，和氧的外扩散。
As-grown, amorphous LiCoO2cathodes grown using a sputtering system were annealed in the temperature range of 650–900°C under an Ar and O2ambients, respectively, in order to obtain crystalline LiCoO2cathodes. The resulting cathodes were then systematically compared with respect to their charge–discharge properties. The post-annealing process under an O2ambient resulted in superior cycling performance and thermal stability at high temperature than the Ar ambient. This effect is discussed in terms of grain boundary, surface roughness, and the outdiffusion of oxygen.