期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 476, 期 1-2, 页码 539-542出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2008.09.055
关键词
Lithium-ion batteries; Cathode materials; Zn-doped; Co-precipitation
资金
- National Natural Science Foundation of China [20273047]
Zn-doped LiCo0.3Ni0.4-xMn0.3ZnxO2 cathode materials were synthesized via co-precipitation method. The structure, electrochemical performance and thermal stability were characterized by X-ray diffraction (XRD), charge/discharge cycling, cyclic voltammograms (CV), electrochemical impedance spectroscopies (EIS) and differential scanning calorimetry (DSC). LiCo0.3Ni0.4-xMn0.3ZnxO2 had stable layered structure with a-NaFeO2 type with x up to 0.05. The compounds of x = 0.02 showed the best discharge capacity and cycle performance which was related to the most stable structure and Zn-doping prevented structural transformations during the topotactic reactions. Meanwhile, Zn-doping improved the high rate discharge capability and thermal stability. (C) 2008 Elsevier B.V. All rights reserved.
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