Synthesis and characterization of Li3V(2-2x/3)Mgx(PO4)3/C cathode material for lithium-ion batteries

被引：150

作者：

Huang, J. S. ^{[1
]}

Yang, L. ^{[1
]}

Liu, K. Y. ^{[1
]}

Tang, Y. F. ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 15期

基金：

国家高技术研究发展计划(863计划);

关键词：

Lithium-ion battery; Li3V2(PO4)(3); Mg-doping; Sol-gel assisted; ELECTROCHEMICAL PERFORMANCE; DOPED LI3V2(PO4)(3); ELECTRODE MATERIALS; VANADIUM PHOSPHATE; ROOM-TEMPERATURE; OLIVINES; FE; COMPOSITES; CAPACITY; PHASE;

D O I：

10.1016/j.jpowsour.2010.02.009

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：

Li3V(2-2x/3)Mgx(PO4)(3)/C (x = 0, 0.15, 0.30, 0.45) composites have been synthesized by the sol-gel assisted solid state method, using adipic acid C6H10O4 (hexanedioic acid) as carbon source. The particle size of the composites is similar to 1 mu m. During the pyrolysis process. Li3V(2-2x/3)Mgx(PO4)(3)/C network structure is formed. The effect of Mg2+ doped on the electrochemical properties of Li3V2(PO4)(3)/C positive materials has been studied. Li3V1.8Mg0.30(PO4)(3)/C as the cathode materials of Li-ion batteries, the retention rate of discharge capacity is 91.4% (1 C) after 100 cycles. Compared with Li3V2(PO4)(3)/C, Li3V(2-2x/3)Mgx(PO4)(3)/C composites have shown enhanced capacity and retention rate capability. The long-term cycles and ex situ XRD tests disclose that Li3V1.8Mg0.30(PO4)(3) exhibits higher structural stability than the undoped system. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：5013 / 5018

页数：6

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