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Type: Journal article
Title: Synthesis and electrochemical properties of non-stoichiometric Li-Mn-spinel (Li₁⋅₀₂MₓMn₁⋅₉₅O₄−yFy) for lithium ion battery application
Other Titles: Synthesis and electrochemical properties of non-stoichiometric Li-Mn-spinel (Li(1)<NON-ASCII>⋅(8901)<NON-ASCII>(02)M(x)Mn(1)<NON-ASCII>⋅(8901)<NON-ASCII>(95)O(4)- yFy) for lithium ion battery application
Author: Feng, C.
Li, H.
Zhang, C.
Guo, Z.
Wu, H.
Tang, J.
Citation: Electrochimica Acta, 2012; 61:87-93
Publisher: Elsevier
Issue Date: 2012
ISSN: 0013-4686
Statement of
Chuanqi Feng, Hua Li, Chaofeng Zhang, Zaiping Guo, Huimin Wu, Jing Tang
Abstract: Non-stoichiometric spinel compounds Li1.02MxMn1.95O4−yFy (M = Co, Y, and Ga) were prepared for the first time by the rheological phase reaction method. The Li1.02MxMn1.95O4−yFy samples were characterized by X-ray diffraction, while the particle size and shape of the Li1.02MxMn1.95O4−yFy were observed by scanning and transmission electron microscopy. The as-prepared samples were used as cathode materials in lithium-ion batteries, their electrochemical properties were tested, and the results showed that the non-stoichiometric spinels Li1.02MxMn1.95O4−yFy had better cycling performance than pure LiMn2O4. In addition, among the different non-stoichiometric spinel samples, the Li1.02Mn1.95Co0.02Y0.01Ga0.01O3.97F0.03 sample not only had higher charge/discharge capacity, but also showed the best cycling performance, as the loss of its capacity was only 7% after 100 cycles. The possible reasons for the outstanding electrical properties of Li1.02Mn1.95Co0.02Y0.01Ga0.01O3.97F0.03 are also discussed.
Keywords: Lithium-ion batteries; Li–Mn-Spinel; electrochemical properties; chemical synthesis
Rights: © 2011 Elsevier Ltd. All rights reserved.
DOI: 10.1016/j.electacta.2011.11.090
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