CAJ | 학술논문

采用溶胶-凝胶法制备了富锂层状材料Li1.18Ni0.15Co0.15Mn0.52O2．通过 X射线衍射仪（XRD）、X-射线光电子能谱（XPS）和扫描电子显微镜（SEM）分别对材料的结构、形貌进行了分析．XRD结果表明，材料属α-NaFeO2型层状结构；XPS结果表明，材料中的Ni，Co和Mn的价态分别为+2，+3和+4价；SEM结果表明，材料颗粒尺寸分布在200~400 nm，且颗粒之间分散比较均匀，无明显的团聚现象；电化学测试结果表明，材料在使用不同电解液进行充放电时，曲线的形状相似，但是充放电容量有所不同．其中在1 mol·L-1LiPF6作为溶质，碳酸亚乙酯（EC）∶碳酸二甲酯（DMC）∶碳酸甲乙酯（EMC）=1∶1∶8（V/V）电解液作用下，材料反应更加完全、彻底，进而使得首次充电及放电容量分别为331.4 mAh·g-1和233.6 mAh·g-1．
채용용효-응효법제비료부리층상재료Li1.18Ni0.15Co0.15Mn0.52O2．통과 X사선연사의（XRD）、X-사선광전자능보（XPS）화소묘전자현미경（SEM）분별대재료적결구、형모진행료분석．XRD결과표명，재료속α-NaFeO2형층상결구；XPS결과표명，재료중적Ni，Co화Mn적개태분별위+2，+3화+4개；SEM결과표명，재료과립척촌분포재200~400 nm，차과립지간분산비교균균，무명현적단취현상；전화학측시결과표명，재료재사용불동전해액진행충방전시，곡선적형상상사，단시충방전용량유소불동．기중재1 mol·L-1LiPF6작위용질，탄산아을지（EC）∶탄산이갑지（DMC）∶탄산갑을지（EMC）=1∶1∶8（V/V）전해액작용하，재료반응경가완전、철저，진이사득수차충전급방전용량분별위331.4 mAh·g-1화233.6 mAh·g-1．
Li-rich layered Li1.18Ni0.15Co0.15Mn0.52O2 were prepared by sol-gel method,and characterized by X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS)and scanning electron microscope(SEM), respectively.XRD results shows that the material belongs to layeredα-NaFeO2 structure,XPS confirms that the valence of Ni,Co,Mn was +2,+3 and +4,respectively.SEM shows that the material exists as loose micron-sized aggregates,being composed of primary grains with diameter of 200~400 nm.The electrochemistry performance of the material shows similar charge-discharge curves and different capacities at different electrolytes.Especially at the electrolyte with LiPF6 in a mixture of erhylene carbonate(EC),dimethylcarbonate(DMC) and ethyl methyl carbonate (EMC)with a volume ratio of 1∶1∶8,the material shows a more complete reaction,and the capacity is 331.4 mAh·g-1 and 233 mAh·g-1 at the initial charge and discharge,respectively.