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An In Situ Formed Surface Coating Layer Enabling LiCoO(2)with Stable 4.6 V High-Voltage Cycle Performances
Wang, Y; Zhang, QH; Xue, ZC; Yang, LF; Wang, JY; Meng, FQ; Li, QH; Pan, HY; Zhang, JN; Jiang, Z; Yang, WL; Yu, XQ; Gu, L; Li, H
2020
Source PublicationADVANCED ENERGY MATERIALS
ISSN1614-6832
Volume10Issue:28Pages:-
Subtype期刊论文
AbstractThe development of high-voltage LiCoO(2)is essential for achieving lithium-ion batteries with high volumetric energy density, however, it faces a great deal of challenges owing to the materials, structure and interfacial instability issues. In this work, a strategy is developed, through heat annealing a precoated surface layer to in situ form a high-voltage-stable surface coating layer, which is demonstrated to be highly effective to improve the high-voltage performance of LiCoO2. It is discovered that LiCoO(2)reacts with Li1.5Al0.5Ti1.5(PO4)(3)(LATP) at 700 degrees C to form exclusively spinel phases in addition to Li3PO4, which are structurally coherent to the layered lattice of LiCoO2. The heat annealing of the precoated thin layer of LATP enables the formation of a high-quality surface layer. Spinel phases possess high-voltage-stable structures with much weaker oxidizing ability of lattice oxygen than layered structure. In addition, the Li(3)PO(4)is a good lithium-ion conductor with excellent chemical stability at high voltages. All these benefits contribute to the construction of a uniform and conformal high-voltage-stable surface layer with favorable lithium conducting kinetics at the LiCoO(2)surface. The modified LiCoO(2)shows excellent 4.6 V high-voltage cycle performance at both room temperature and 45 degrees C. The thermal stability is greatly enhanced as well.
KeywordLITHIUM ION BATTERIES X-RAY-DIFFRACTION LICOO2 CATHODE PHASE-TRANSITION STABILITY LIXCOO2 INTERCALATION ELECTRODES BEHAVIOR OXIDE
DOI10.1002/aenm.202001413
Indexed BySCI ; EI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/32701
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Chinese Acad Sci, Beijing Adv Innovat Ctr Mat Genome Engn, Beijing Key Lab New Energy Mat & Devices, Key Lab Renewable Energy,Inst Phys, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
4.Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA
5.Yangtze River Delta Phys Res Ctr Co Ltd, Liyang 213300, Peoples R China
Recommended Citation
GB/T 7714
Wang, Y,Zhang, QH,Xue, ZC,et al. An In Situ Formed Surface Coating Layer Enabling LiCoO(2)with Stable 4.6 V High-Voltage Cycle Performances[J]. ADVANCED ENERGY MATERIALS,2020,10(28):-.
APA Wang, Y.,Zhang, QH.,Xue, ZC.,Yang, LF.,Wang, JY.,...&Li, H.(2020).An In Situ Formed Surface Coating Layer Enabling LiCoO(2)with Stable 4.6 V High-Voltage Cycle Performances.ADVANCED ENERGY MATERIALS,10(28),-.
MLA Wang, Y,et al."An In Situ Formed Surface Coating Layer Enabling LiCoO(2)with Stable 4.6 V High-Voltage Cycle Performances".ADVANCED ENERGY MATERIALS 10.28(2020):-.
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