摘要
在传统溶胶凝胶法的基础上,通过高温热处理LiNi_(0.5)Mn_(1.5)O_4前驱体,合成了高性能的LiNi_(0.5)Mn_(1.5)O_4材料。通过X射线衍射仪测试材料的结构,经过超高温热处理后,获得了晶体发育完好的LiNi_(0.5)Mn_(1.5)O_4。经电化学测试,高温热处理显著提高了材料的循环性能。经过900℃处理的LiNi_(0.5)Mn_(1.5)O_4首次充放电容量达到123 mAh/g,在1 C倍率下循环一百次以后容量仍在121.6 mAh/g左右,容量保持率达到98.9%,高温热处理显著的改善了材料的循环性能。
The high-capability LiNi0 5 Mr^ 5 0 4 was synthesized by using high temperature to roast the precursor of the traditional sol-gel method. The crystal structure was tested by X-ray diffraction. The structure of the samples which was roasted at high temperature was perfect. The cycle capability was significantly improved after being roasted at high temperature. The first charge-discharge capacity of the sample which is roasted at 900 Tl is about 123 mAh/g and it is 121.6 mAh/g after circulated 100 cycles at 1 C and the rate of capacity retention is 98. 9% . The cycle capability was improved obviously after being roasted at high temperature.Key word：
出处
《人工晶体学报》
CSCD
北大核心
2017年第11期2290-2294,共5页
Journal of Synthetic Crystals
基金
国家自然科学基金(5140040053)
