Electrochemical behavior of Li3-xM′xV2-yM"y(PO4)3 (M′ = K, M" = Sc, Mg plus Ti)/C composite cathode material for lithium-ion batteries

被引：61
作者：
Mateyshina, Yu G. [1 ,2 ]
Uvarov, N. F. [1 ,2 ]
机构：
[1] Inst Solid State Chem & Mechanochem, Novosibirsk 630128, Russia
[2] Novosibirsk State Univ, Novosibirsk 630090, Russia
来源：
JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 03期
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; SOL-GEL METHOD; VANADIUM PHOSPHATE; LI3V2(PO4)(3)/CARBON CATHODE; ROOM-TEMPERATURE; HIGH-PERFORMANCE; PHASE; CAPACITY;
D O I：
10.1016/j.jpowsour.2010.08.078
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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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收藏
页码：1494 / 1497
页数：4
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