Long-term cycle stability at a high current for nanocrystalline LiFePO4 coated with a conductive polymer

被引：9

作者：

Dinh, Hung-Cuong ^{[1
]}

Lim, Hanjo ^{[2
]}

Park, Ki Dong ^{[3
]}

Yeo, In-Hyeong ^{[4
]}

Kang, Yongku ^{[5
]}

Mho, Sun-il ^{[1
]}

机构：

[1] Ajou Univ, Div Energy Syst Res, Suwon 443749, South Korea

[2] Ajou Univ, Dept Elect & Comp Engn, Suwon 443749, South Korea

[3] Ajou Univ, Dept Mol Sci & Engn, Suwon 443749, South Korea

[4] Dongguk Univ, Dept Chem, Seoul 100715, South Korea

[5] Korea Res Inst Chem Technol, Div Adv Mat, Daejeon 305600, South Korea

来源：

ADVANCES IN NATURAL SCIENCES-NANOSCIENCE AND NANOTECHNOLOGY | 2013年 / 4卷 / 01期

关键词：

Lithium-ion battery; nanocrystal; conductive polymer; cycle stability;

D O I：

10.1088/2043-6262/4/1/015011

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Highly uniform hierarchical-microstructured LiFePO4 particles with dumbbell-and donut-shape and individual LiFePO4 nanocrystals were prepared by a hydrothermal method utilizing citric acid or a triblock copolymer (Pluronic P123) as a surfactant. The cathode composed of the individual nanocrystalline LiFePO4 particles exhibited higher specific capacity than the cathodes composed of the hierarchically assembled microparticles. Coating a conductive polymer, poly-3,4-ethylenedioxythiophene (PEDOT), on the surface of LiFePO4 particles improved the battery performances such as large specific capacities, high rate capability and an improved cycle stability. The nanocrystalline LiFePO4 particles coated with PEDOT (20 wt%) exhibited the highest discharge capacities of 175 and 136 mAh g(-1) for the first battery cycle and 163 and 128 mAh g(-1) after 500 battery cycles, with a degradation rate of 6-7%, at the rates of 1 and 10 C, respectively.

引用

页数：5

共 21 条

[1]

Carvajal J R, 2008, FULLPROF 2000 RIETVE

[2] Response to "unsupported claims of ultrafast charging of Li-ion batteries" [J].

Ceder, G. ;

Kang, B. .

JOURNAL OF POWER SOURCES, 2009, 194 (02) :1024-1028

[3] Chemical synthesis of poly(3,4-ethylenedioxythiophene) [J].

Corradi, R ;

Armes, SP .

SYNTHETIC METALS, 1997, 84 (1-3) :453-454

[4] Hydrothermal and Solvothermal Process Towards Development of LiMPO4 (M = Fe, Mn) Nanomaterials for Lithium-Ion Batteries [J].

Devaraju, Murukanahally Kempaiah ;

Honma, Itaru .

ADVANCED ENERGY MATERIALS, 2012, 2 (03) :284-297

[5] Electrochemical Analysis of Conductive Polymer-Coated LiFePO4 Nanocrystalline Cathodes with Controlled Morphology [J].

Dinh, Hung-Cuong ;

Mho, Sun-Il ;

Yeo, In-Hyeong .

ELECTROANALYSIS, 2011, 23 (09) :2079-2086

[6] Synthesis of nanocrystals and morphology control of hydrothermally prepared LiFePO4 [J].

Ellis, B. ;

Kan, Wang Hay ;

Makahnouk, W. R. M. ;

Nazar, L. F. .

JOURNAL OF MATERIALS CHEMISTRY, 2007, 17 (30) :3248-3254

[7] Structural and electrochemical studies of PPy/PEG-LiFePO4 cathode material for Li-ion batteries [J].

Fedorkova, Andrea ;

Nacher-Alejos, Ana ;

Gomez-Romero, Pedro ;

Orinakova, Renata ;

Kaniansky, Dusan .

ELECTROCHIMICA ACTA, 2010, 55 (03) :943-947

[8] Surface structures and crystal morphologies of LiFePO4:: relevance to electrochemical behaviour [J].

Fisher, Craig A. J. ;

Islam, M. Saiful .

JOURNAL OF MATERIALS CHEMISTRY, 2008, 18 (11) :1209-1215

[9] Study of the LiFePO4/FePO4 two-phase system by high-resolution electron energy loss spectroscopy [J].

Laffont, L. ;

Delacourt, C. ;

Gibot, P. ;

Wu, M. Yue ;

Kooyman, P. ;

Masquelier, C. ;

Tarascon, J. Marie .

CHEMISTRY OF MATERIALS, 2006, 18 (23) :5520-5529

[10] A Soft Chemistry Approach to Coating of LiFePO4 with a Conducting Polymer [J].

Lepage, David ;

Michot, Christophe ;

Liang, Guoxian ;

Gauthier, Michel ;

Schougaard, Steen B. .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2011, 50 (30) :6884-6887

← 1 2 3 →