Influence of LiFePO4/C interface on electrochemical properties

被引：17

作者：

Pan, Fangfang ^{[1
]}

Wang, Wen-lou ^{[1
]}

Chen, Dongming ^{[1
]}

Yan, Wensheng ^{[2
]}

机构：

[1] Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2011年 / 21卷 / 38期

关键词：

RECHARGEABLE LITHIUM BATTERIES; LI-ION BATTERIES; POSITIVE-ELECTRODE MATERIALS; RAY-ABSORPTION SPECTROSCOPY; CARBON COATING THICKNESS; SOL-GEL SYNTHESIS; CATHODE MATERIALS; COPRECIPITATION METHOD; ACTIVE MATERIALS; RATE PERFORMANCE;

D O I：

10.1039/c1jm11551k

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：

LiFePO4/C particles with different LiFePO4-C interface were prepared and investigated with emphasis on the interface property which has been found to be important for the power performance of LiFePO4. Soft-X-ray-absorption (XAS) spectra collected at O and C K-edge show a distinct bonding character between carbon and LiFePO4 in carbon coated LiFePO4/C. Galvanostatic change-discharge at different rates and electrochemical impedance tests demonstrate that the interface action between LiFePO4 and carbon within LiFePO4/C composites has a crucial effect on its electrochemical performance.

引用

页码：14680 / 14684

页数：5

共 53 条

[1] Nanostructured materials for advanced energy conversion and storage devices [J].

Aricò, AS ;

Bruce, P ;

Scrosati, B ;

Tarascon, JM ;

Van Schalkwijk, W .

NATURE MATERIALS, 2005, 4 (05) :366-377

[2] Electronic structure of phospho-olivines LixFePO4 (x=0,1) from soft-x-ray-absorption and -emission spectroscopies -: art. no. 184717 [J].

Augustsson, A ;

Zhuang, GV ;

Butorin, SM ;

Osorio-Guillén, JM ;

Dong, CL ;

Ahuja, R ;

Chang, CL ;

Ross, PN ;

Nordgren, J ;

Guo, JH .

JOURNAL OF CHEMICAL PHYSICS, 2005, 123 (18)

[3] Synthesis and characterization of Carbon Nano Fiber/LiFePO4 composites for Li-ion batteries [J].

Bhuvaneswari, M. S. ;

Bramnik, N. N. ;

Ensling, D. ;

Ehrenberg, H. ;

Jaegermann, W. .

JOURNAL OF POWER SOURCES, 2008, 180 (01) :553-560

[4] Nanomaterials for rechargeable lithium batteries [J].

Bruce, Peter G. ;

Scrosati, Bruno ;

Tarascon, Jean-Marie .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2008, 47 (16) :2930-2946

[5] Reducing carbon in LiFePO4/C composite electrodes to maximize specific energy, volumetric energy, and tap density [J].

Chen, ZH ;

Dahn, JR .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2002, 149 (09) :A1184-A1189

[6] The effect of carbon coating thickness on the capacity of LiFePO4/C composite cathodes [J].

Cho, Yung-Da ;

Fey, George Ting-Kuo ;

Kao, Hsien-Ming .

JOURNAL OF POWER SOURCES, 2009, 189 (01) :256-262

[7] Surfactant based sol-gel approach to nanostructured LiFePO4 for high rate Li-ion batteries [J].

Choi, Daiwon ;

Kumta, Prashant N. .

JOURNAL OF POWER SOURCES, 2007, 163 (02) :1064-1069

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

Chung, SY ;

Bloking, JT ;

Chiang, YM .

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

[9] Enhanced secondary electron yield from oxidized regions on amorphous carbon films studied by x-ray spectromicroscopy [J].

Díaz, J ;

Anders, S ;

Cossy-Favre, A ;

Samant, M ;

Stöhr, J .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1999, 17 (05) :2737-2740

[10] Hierarchically Porous Monolithic LiFePO4/Carbon Composite Electrode Materials for High Power Lithium Ion Batteries [J].

Doherty, Cara M. ;

Caruso, Rachel A. ;

Smarsly, Bernd M. ;

Adelhelm, Philipp ;

Drummond, Calum J. .

CHEMISTRY OF MATERIALS, 2009, 21 (21) :5300-5306

← 1 2 3 4 5 6 →