Cupric ion substituted LiFePO4/C composites with enhanced electrochemical performance for Li-ion batteries

被引：12

作者：

Ma, Zhipeng ^{[1
]}

Fan, Yugian ^{[1
]}

Shao, Guangjie ^{[1
,2
]}

Wang, Lin ^{[1
]}

Song, Jianjun ^{[1
]}

Wang, Guiling ^{[1
]}

Liu, Tingting ^{[1
]}

机构：

[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China

[2] Yanshan Univ, Coll Environm & Chem Engn, Hebei Key Lab Appl Chem, Qinhuangdao 066004, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2014年 / 139卷

关键词：

Lithium iron phosphate; Cupric ion substitution; Cathode material; Lithium-ion battery; DOPED LIFEPO4/C; CATHODE MATERIALS; ELECTRODE MATERIALS; PHOSPHO-OLIVINES; LIXMPO4; M; LITHIUM; DIFFUSION; CONDUCTIVITY; TEMPERATURE; BEHAVIOR;

D O I：

10.1016/j.electacta.2014.07.030

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Cupric ion substituted LiFePO4/C composites were successfully synthesized via a two-step solid state reaction method. The SEM mapping demonstrates that cupric is well substituted in LiFePO4. Interestingly, the XRD spectra indicate that the substituted cupric could enlarge the interplanar distance of planes that parallelled to [010] direction of LiFePO4 crystallines, which could widens the diffusion channels of Li+ along [010] direction. For further research, Lithium ion storage behavior of as-synthesized cupric ion substituted LiFePO4/C products were investigated via various electrochemical strategies, and the highest capacity of 152.4, 144.4, 126.7 and 110.5 mAhg(-1) was achieved by LiFe0.985Cu0.015PO4/C at discharge rate of I, 2, 5, and 10 C, respectively. Compared the result with that of LiFePO4/C, we can see that cupric ion substituted LiFePO4/C composites show enhanced electrochemical activity for Li+ storage with decreased overpotential and increased high rate capability for electrochemical reaction. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：256 / 263

页数：8

共 34 条

[1] Microwave-assisted solution synthesis of doped LiFePO4 with high specific charge and outstanding cycling performance [J].

Bilecka, Idalia ;

Hintennach, Andreas ;

Rossell, Marta D. ;

Xie, Dan ;

Novak, Petr ;

Niederberger, Markus .

JOURNAL OF MATERIALS CHEMISTRY, 2011, 21 (16) :5881-5890

[2] Electronically conductive phospho-olivines as lithium storage electrodes [J].

Chung, SY ;

Bloking, JT ;

Chiang, YM .

NATURE MATERIALS, 2002, 1 (02) :123-128

[3] Spurious chemical diffusion coefficients of Li+ in electrode materials evaluated with GITT [J].

Deiss, E .

ELECTROCHIMICA ACTA, 2005, 50 (14) :2927-2932

[4] Vanadium Modified LiFePO4 Cathode for Li-Ion Batteries [J].

Hong, Jian ;

Wang, C. S. ;

Chen, X. ;

Upreti, S. ;

Whittingham, M. Stanley .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2009, 12 (02) :A33-A38

[5] Approaching theoretical capacity of LiFePO4 at room temperature at high rates [J].

Huang, H ;

Yin, SC ;

Nazar, LF .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2001, 4 (10) :A170-A172

[6] Enhanced electrochemical performances of LiFePO4/C by co-doping with magnesium and fluorine [J].

Huang, Yongan ;

Xu, Yunlong ;

Yang, Xu .

ELECTROCHIMICA ACTA, 2013, 113 :156-163

[7] Atomic-scale investigation of defects, dopants, and lithium transport in the LiFePO4 olivine-type battery material [J].

Islam, MS ;

Driscoll, DJ ;

Fisher, CAJ ;

Slater, PR .

CHEMISTRY OF MATERIALS, 2005, 17 (20) :5085-5092

[8] Synthesis of carbon-coated LiFePO4 nanoparticles with high rate performance in lithium secondary batteries [J].

Konarova, Muxina ;

Taniguchi, Izumi .

JOURNAL OF POWER SOURCES, 2010, 195 (11) :3661-3667

[9] Effect of Mn2+-doping in LiFePO4 and the low temperature electrochemical performances [J].

Li, Chengfeng ;

Hua, Ning ;

Wang, Chengyun ;

Kang, Xueya ;

Wumair, Tuerdi ;

Han, Ying .

JOURNAL OF ALLOYS AND COMPOUNDS, 2011, 509 (05) :1897-1900

[10] Stable cycle-life properties of Ti-doped LiFePO4 compounds synthesized by co-precipitation and normal temperature reduction method [J].

Li, Lingjun ;

Li, Xinhai ;

Wang, Zhixing ;

Wu, Ling ;

Zheng, Junchao ;

Guo, Huajun .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2009, 70 (01) :238-242

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