Synergism of Cu and Al co-doping on improvements of structural integrity and electrochemical performance for LiNi0.5Mn1.5O4

doi:10.1016/j.jallcom.2019.153140

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	Synergism of Cu and Al co-doping on improvements of structural integrity and electrochemical performance for LiNi0.5Mn1.5O4
	Li, Shiyou 1,2; Wei, Yuan 1; Wang, Peng 1; Feng, Yaohua 1; Liang, Wenbiao 1; Ding, Hao 1; Cui, Xiaoling 1,2
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2020-04-15
卷号	820
关键词	Lithium-ion battery Copper and aluminum co-doping Lithium nickel manganese oxide Electrochemical performance
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2019.153140
英文摘要	Cu and Al co-doped LiNi0.5-xMn1.49Al0.01O4 (x = 0.01, 0.03, 0.05) cathode materials, are synthesized by the alcohol-colloidal method combined with high temperature calcination. The effect of Cu and Al doping on LiNi0.5Mn1.5O4 and their optimum content is investigated. Structural analyses indicate that co-doped LiNi0.5Mn1.5O4 materials remain spinet structure with an octahedral morphology, Fd-3m space group. Furthermore, Cu and Al doping enhances the degree of cation disorder. The most highlight result is that LiNi0.47Cu0.03Mn1.49Al0.01O4 has the optimal both rate and cycling performances. The capacity retention of LiNi0.47Cu0.03Mn1.49Al0.01O4 remains 96.55% after 100 cycles at 0.25 C and its specific capacities maintains up to 103.4 mAh g(-1) even at 5 C. The excellent electrochemical properties can be attributed to the synergistic effect of Cu and Al. Al enriched on the surface serves as a protective layer to suppress side reactions and compensate the adverse effect of more Mn3+, enhancing thermodynamic stability. Simultaneously, Cu in the bulk offers larger diffusion tunnel, accelerating transition kinetics of Li+. Co-doping of metal ions with different valence is a prospective approach to promoting properties of 5 V LiNi0.5Mn1.5O4 cathode materials. (C) 2019 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[21566021] ; High Value Patent Conversion Implementation Project[18ZC1LA014] ; Gansu Province Science and Technology Major Project[17ZD2GC011]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000507854700147
状态	已发表
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/64162]
专题	石油化工学院
通讯作者	Cui, Xiaoling
作者单位	1.Lanzhou Univ Technol, Coll Petrochem Technol, 36 Pengjiaping Rd, Lanzhou 730050, Gansu, Peoples R China 2.Gansu Engn Lab Cathode Mat Lithium Ion Battery, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Li, Shiyou,Wei, Yuan,Wang, Peng,et al. Synergism of Cu and Al co-doping on improvements of structural integrity and electrochemical performance for LiNi0.5Mn1.5O4[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,820.
APA	Li, Shiyou.,Wei, Yuan.,Wang, Peng.,Feng, Yaohua.,Liang, Wenbiao.,...&Cui, Xiaoling.(2020).Synergism of Cu and Al co-doping on improvements of structural integrity and electrochemical performance for LiNi0.5Mn1.5O4.JOURNAL OF ALLOYS AND COMPOUNDS,820.
MLA	Li, Shiyou,et al."Synergism of Cu and Al co-doping on improvements of structural integrity and electrochemical performance for LiNi0.5Mn1.5O4".JOURNAL OF ALLOYS AND COMPOUNDS 820(2020).