Study on the surface modification of spinel LiNi0.45Cr0.1Mn1.45O4
Liu, Guoqiang1,2,3; Sun, Lizhu1; Tong, Zizheng5; Liu, Ru-Shi5,6,7; Wang, Bao4; Xia, Xinde8
AbstractA amorphous compound Li-Al-Ti-O is coated on the surface of spinel LiNi0.45Cr0.1Mn1.45O4. Different from other coatings, the coating layer and the bulk material are not simply connected. There is a transition region between the coating layer and the bulk material, in which no sudden change of lattice emerges. High-resolution transmission electron microscopy (HRTEM) shows that lattice matching is formed at the contact region between coating layer and bulk material. The Cr Kedge XANES spectra show that the local structure of Cr has not changed before and after coating. According to the electrochemical impedance measurement, the diffusion coefficient of lithium ion has no much changes after coating. Compared with the pristine materials, this coated materials exhibits improved cycle performance. After 700 charging and discharging cycles, the capacity retention rate reaches over 83%, and the Coulomb efficiency of each cycle is 99.5%. This coating structure undoubtedly increases the bonding strength between the coating layer and the bulk material, and also reduces the resistance of lithium ions passing through transition region. This coating lays a good foundation for the practical application of the spinel LiNi0.45Cr0.1Mn1.45O4. (C) 2019 Elsevier B.V. All rights reserved.
KeywordSpinel LiNi0.45Cr0.1Mn1.45O4 Charge-discharge properties Surface modification Structure characteristics
Funding ProjectNational Natural Science Foundation of China[51574081] ; Ministry of Science and Technology of Taiwan ; MOST[107-2113-M-002-008-MY3]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China ; Ministry of Science and Technology of Taiwan ; MOST
WOS IDWOS:000512369200136
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Document Type期刊论文
Corresponding AuthorLiu, Guoqiang; Wang, Bao
Affiliation1.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China
2.Nankai Univ, Coll Chem, Key Lab Adv Energy Mat Chem, Minist Educ, Tianjin 300071, Peoples R China
3.Northeastern Univ, Sch Met, Liaoning Key Lab Met Sensor & Technol, Shenyang 110819, Liaoning, Peoples R China
4.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China
5.Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan
6.Natl Taipei Univ Technol, Dept Mech Engn, Taipei 106, Taiwan
7.Natl Taipei Univ Technol, Grad Inst Mfg Technol, Taipei 106, Taiwan
8.Guangzhou Great Power Energy & Technol Co Ltd, Guangzhou, Peoples R China
Recommended Citation
GB/T 7714
Liu, Guoqiang,Sun, Lizhu,Tong, Zizheng,et al. Study on the surface modification of spinel LiNi0.45Cr0.1Mn1.45O4[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,821:8.
APA Liu, Guoqiang,Sun, Lizhu,Tong, Zizheng,Liu, Ru-Shi,Wang, Bao,&Xia, Xinde.(2020).Study on the surface modification of spinel LiNi0.45Cr0.1Mn1.45O4.JOURNAL OF ALLOYS AND COMPOUNDS,821,8.
MLA Liu, Guoqiang,et al."Study on the surface modification of spinel LiNi0.45Cr0.1Mn1.45O4".JOURNAL OF ALLOYS AND COMPOUNDS 821(2020):8.
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