锂离子电池正极材料Li[Li_(0.167)Mn_(0.583)Ni_(0.25)]O_2的合成与性能研究

CORC > 厦门大学 > 2008年第14卷

	锂离子电池正极材料Li[Li_(0.167)Mn_(0.583)Ni_(0.25)]O_2的合成与性能研究; Synthesis and Electrochemical Characteristics of Li[Li_(0.167)Mn_(0.583)Ni_(0.25)]O_2 Cathode Material
	于凌燕 ; 仇卫华 ; 连芳 ; 黄佳原 ; 康晓丽 ; 刘伟 ; YU Ling-yan ; QIU Wei-hua ; LIAN Fang ; HUANG Jia-yuan ; KANG Xao-li ; LIU Wei
刊名	http://electrochem.xmu.edu.cn/CN/abstract/abstract8632.shtml
	2008-05-28
关键词	锂离子电池正极材料固溶体层状结构低热固相法 lithium batteries cathode materials solid solution layered structure low-heat solid state reaction
英文摘要	应用低热固相法制备镍锰复合正极材料Li[Li0.167Mn0.583Ni0.25]O2.XRD、FESEM和恒电流充放电测试表明,该材料结晶良好,可标定为α-NaFeO2型结构(空间群R3-m),颗粒粒径约为60~100 nm,粒度均匀细小.在2.5~4.4 V之间以0.5 C(100 mA/g)做充放电循环时,可逆比容量在120 mAh/g以上,循环性能非常稳定.如将截止电压升高到4.6 V,则比容量大大提高,最高可达234 mAh/g.上述充放电测试都出现了比容量随循环次数上升的现象.主要原因可归结为材料中Mn(Ⅳ)向Mn(Ⅲ)的转变,但在不同的电压范围内导致该转变的起因并不相同.; The cathode material of Li[Li0.167Mn0.583Ni0.25]O2 was synthesized by low-heat solid state reaction.The results of XRD and FESEM indicated that the powders of the material were well crystallized with the uniform diameters ranging from 60 nm to 100 nm and could be indexed as α-NaFeO2 structure(R3-m space).Galvanostatic charge-discharge tests showed that the electrode delivered the capacity of about 120 mAh/g with good cyclability when cycled in 2.5~4.4V at 0.5C.When the cut-off potential was set up to 4.6V,the cathode delivered much larger capacities with the maximum of 234 mAh/g.It was observed that the discharge capacity gradually increased with the increment of the cycle number.The transformation between Mn(Ⅳ) and Mn(Ⅲ) could be responsible for the increasing capacity.However,the causes for this transformation in different potenticals varied.; 作者联系地址：北京科技大学材料科学与工程学院北京市新能源材料与技术重点实验室,北京科技大学材料科学与工程学院北京市新能源材料与技术重点实验室,北京科技大学材料科学与工程学院北京市新能源材料与技术重点实验室,北京科技大学材料科学与工程学院北京市新能源材料与技术重点实验室,北京科技大学材料科学与工程学院北京市新能源材料与技术重点实验室,北京科技大学材料科学与工程学院北京市新能源材料与技术重点实验室北京100083,中钢集团洛阳耐火材料研究院,河南洛阳471039,北京100083,北京100083,北京100083,北京100083,北京100083; Author's Address: 1.Beijing Key Lab.of New Energy Materials and Technologies,School of Material Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China;2.Sinosteel Luoyang Institute of Refractories Research,Luoyang 471039,Hennan,China
语种	中文
出版者	厦门大学《电化学》编辑部
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/58177]
专题	2008年第14卷
推荐引用方式 GB/T 7714	于凌燕,仇卫华,连芳,等. 锂离子电池正极材料Li[Li_(0.167)Mn_(0.583)Ni_(0.25)]O_2的合成与性能研究, Synthesis and Electrochemical Characteristics of Li[Li_(0.167)Mn_(0.583)Ni_(0.25)]O_2 Cathode Material[J]. http://electrochem.xmu.edu.cn/CN/abstract/abstract8632.shtml,2008.
APA	于凌燕.,仇卫华.,连芳.,黄佳原.,康晓丽.,...&LIU Wei.(2008).锂离子电池正极材料Li[Li_(0.167)Mn_(0.583)Ni_(0.25)]O_2的合成与性能研究.http://electrochem.xmu.edu.cn/CN/abstract/abstract8632.shtml.
MLA	于凌燕,et al."锂离子电池正极材料Li[Li_(0.167)Mn_(0.583)Ni_(0.25)]O_2的合成与性能研究".http://electrochem.xmu.edu.cn/CN/abstract/abstract8632.shtml (2008).