摘要
以碳微球为模板,通过溶剂热法及随后的煅烧处理得到中空的NiCo_2O_4纳米微球,通过X射线粉末衍射(XRD)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)对样品的组成及形貌进行了表征。结果表明,制备的NiCo_2O_4中空微球具有高度的结晶性,粒径为300 nm,空心球壁厚为30 nm,当用作锂离子电池负极材料时,在1 000 mA/g电流密度下,首次放电容量达到了1 360 mA/hg,循环250次后,容量仍然高达585 mA/hg,库伦效率高达99%,表现出了优异的循环性能。
Hollow NiCo2O4 nanospheres were synthesized via a solvothermal route followed by cacination in air.The crystalline structures and morphology features were examined by X-ray diffraction（ XRD）,scanning electron microscopy（SEM） and transmission electron microscopy（ TEM）,respectively.The hollow NiCo2O4 nanospheres has a high crystallinity with an average diameter of 300 nm and the size of outer shell is 30 nm.The hollow NiCo2O4 nanospheres,when applied as a LIB anode material,possess a high discharge capacity of 1 360 m A/hg and exhibit a long cycle life（585 m A/hg after 250 cycles） at a rate of 1 000 mA/g,corresponding to a high coulombic efficiency of 99%.
出处
《应用化工》
CAS
CSCD
北大核心
2016年第6期1062-1065,1069,共5页
Applied Chemical Industry
基金
山西省自然科学基金项目(2015011016)
山西省国际科技合作项目(2012081020)
