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Correlating cycle performance improvement and structural alleviation in LiMn2-xMxO4 spinel cathode materials: A systematic study on the effects of metal-ion doping
Gu, HY; Wang, GJ; Zhu, CC; Hu, Y; Zhang, XM; Wen, W; Yang, XW; Wang, BF; Gao, X; Zhan, XL; Li, JK; Ma, ZF; He, QG
2019
Source PublicationELECTROCHIMICA ACTA
ISSN0013-4686
Volume298Issue:-Pages:806—817
Subtype期刊论文
AbstractLiMn2-xMxO4 (M = Co, Ni, Fe, Cr, Al; x = 0, 0.05, 0.15, 0.2) cathode materials for lithium-ion batteries have been synthesized by an improved solid-state method. Samples were characterized by XRD, SEM, and XPS for their structure, morphology and surface conditions. Their electrochemical performance was also tested. Compared with pristine LiMn2O4, all LiMn(2-x)MxO(4) materials exhibited much better cycling stability between 3.0 V and 4.3 V. LiMn1.85Cr0.15O4 showed a superior cycling stability with a capacity retention of 96.6% after 100 cycles, which is 23% higher than that of the LiMn2O4 phase. The underlying mechanism of the improved cycle performance has been investigated by synchrotron-based X-ray diffraction under operating conditions for batteries. In situ XRD results proved that metal-ion-doped LiMn2O4 could hinder the phase transformation, reduce microstrain and volume shrinkage during cycling and improve their structural stability. The role of the doped metal ions was also confirmed by density functional theory calculations. (c) 2018 Elsevier Ltd. All rights reserved.
KeywordSYNCHROTRON X-RAY DOPED LIMN2O4 ELECTROCHEMICAL PERFORMANCE COMPOSITE CATHODES SURFACE-CHEMISTRY PHASE-TRANSITIONS MANGANESE-SPINEL CAPACITY FADE LITHIUM AL
DOI10.1016/j.electacta.2018.12.152
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/31531
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Zhejiang Univ, Coll Chem & Biol Engn, Zhejiang Prov Key Lab Adv Chem Engn Manufacture T, Hangzhou 310027, Zhejiang, Peoples R China;
2.Hubei Engn Univ, Coll Chem & Mat Sci, Xiaogan 432000, Peoples R China;
3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China;
4.Tongji Univ, Sch Mat Sci & Engn, Shanghai 201804, Peoples R China;
5.Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China;
6.Shanghai Jiao Tong Univ, Dept Chem Engn, Shanghai Electrochem Energy Devices Res Ctr, Shanghai 200240, Peoples R China
Recommended Citation
GB/T 7714
Gu, HY,Wang, GJ,Zhu, CC,et al. Correlating cycle performance improvement and structural alleviation in LiMn2-xMxO4 spinel cathode materials: A systematic study on the effects of metal-ion doping[J]. ELECTROCHIMICA ACTA,2019,298(-):806—817.
APA Gu, HY.,Wang, GJ.,Zhu, CC.,Hu, Y.,Zhang, XM.,...&He, QG.(2019).Correlating cycle performance improvement and structural alleviation in LiMn2-xMxO4 spinel cathode materials: A systematic study on the effects of metal-ion doping.ELECTROCHIMICA ACTA,298(-),806—817.
MLA Gu, HY,et al."Correlating cycle performance improvement and structural alleviation in LiMn2-xMxO4 spinel cathode materials: A systematic study on the effects of metal-ion doping".ELECTROCHIMICA ACTA 298.-(2019):806—817.
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