Synergism of Cu and Al co-doping on improvements of structural integrity and electrochemical performance for LiNi0.5Mn1.5O4
Li, Shiyou1,2; Wei, Yuan1; Wang, Peng1; Feng, Yaohua1; Liang, Wenbiao1; Ding, Hao1; Cui, Xiaoling1,2
2020-04-15
发表期刊JOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
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
DOI10.1016/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
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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).
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