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

IR > 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, Shiyou1,2 ; Wei, Yuan 1; Wang, Peng 1; Feng, Yaohua 1; Liang, Wenbiao 1; Ding, Hao 1; Cui, Xiaoling1,2
	2020-04-15
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	820
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.
关键词	Lithium-ion battery Copper and aluminum co-doping Lithium nickel manganese oxide Electrochemical performance
DOI	10.1016/j.jallcom.2019.153140
收录类别	SCI ; SCIE
语种	英语
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
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000507854700147
出版者	ELSEVIER SCIENCE SA
EI入藏号	20195007831335
EI主题词	Lithium compounds
EI分类号	531.1 Metallurgy - 541.1 Aluminum - 544.1 Copper - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 951 Materials Science
来源库	WOS
引用统计	被引频次：44[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://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
第一作者单位	石油化工学院
通讯作者单位	石油化工学院
第一作者的第一单位	石油化工学院
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).