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
AbstractCu 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.
KeywordLithium-ion battery Copper and aluminum co-doping Lithium nickel manganese oxide Electrochemical performance
Indexed BySCI ; SCIE
Funding ProjectNational Natural Science Foundation of China[21566021] ; High Value Patent Conversion Implementation Project[18ZC1LA014] ; Gansu Province Science and Technology Major Project[17ZD2GC011]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000507854700147
EI Accession Number20195007831335
EI KeywordsLithium compounds
EI Classification Number531.1 Metallurgy - 541.1 Aluminum - 544.1 Copper - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 951 Materials Science
Source libraryWOS
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Cited Times:44[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorCui, Xiaoling
Affiliation1.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
First Author AffilicationColl Petrochem Engn
Corresponding Author AffilicationColl Petrochem Engn
First Signature AffilicationColl Petrochem Engn
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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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