期刊
JOURNAL OF POWER SOURCES
卷 196, 期 3, 页码 1494-1497出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2010.08.078
关键词
Lithium vanadium phosphates; Li(3-x)M '(x)V(2-y)M ''(2y)(PO(4))(3) (M ' = K, M '' = Sc, Mg plus Ti); Cathode materials for lithium batteries
资金
- Presidium of the Russian Academy of Sciences [26, 60]
Composites of monoclinic Li(3-x)M'(x)V(2-y)M ''(2y)(PO(4))(3) (M' = K, M '' = Sc, Mg + Ti) with carbon were synthesized by solid-state reaction using oxalic acid or 6% H(2)/Ar gas mixture as reducing agents at sintering temperature of 850 degrees C. The samples were characterized by X-ray diffraction (XRD), voltammetry and electrochemical galvanostatic cycling. The capacity of Li(3)V(2)(PO(4))(3) synthesized using hydrogen as the reducing agent was 127 mAh g(-1) and decreased to 120 mAh g(-1) after 20 charge-discharge cycles. The substitution of lithium and vanadium for other ions did not result in the improvement of the electrochemical characteristics of the samples. (C) 2010 Elsevier B.V. All rights reserved.
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