Influence of Particle Size and Crystal Orientation on the Electrochemical Behavior of Carbon-Coated LiFePO4

被引：114

作者：

Ferrari, Stefania ^{[1
]}

Lavall, Rodrigo Lassarote ^{[1
]}

Capsoni, Doretta ^{[1
]}

Quartarone, Eliana ^{[1
]}

Magistris, Aldo ^{[1
]}

Mustarelli, Piercarlo ^{[1
]}

Canton, Patrizia ^{[2
]}

机构：

[1] Univ Pavia, Dipartimento Chim Fis M Rolla, I-27100 Pavia, Italy

[2] Univ Ca Foscari, Dipartimento Chim Fis, Venice, Italy

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 29期

关键词：

RAY-POWDER DIFFRACTOMETER; CATHODE MATERIAL; LI-INSERTION/EXTRACTION; AXIAL DIVERGENCE; PHOSPHO-OLIVINES; LITHIUM; PROFILE; REACTIVITY; CAPACITY; DENSITY;

D O I：

10.1021/jp1025834

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：

We investigate the influence of particle size and crystal orientation on the electrochemical behavior of carbon-coated LiFePO4 prepared by a hydrothermal synthesis in the presence of a polymeric surfactant and a source of carbon. We evaluated the charge/discharge profiles of two samples, one constituted by particles in the micrometer range with a platelet-like shape (large ac facet and (020) crystal orientation) and another made of sub-micrometer-rounded particles with a random crystal orientation. At low current rates the crystal orientation seems to be the prevailing factor, whereas at high current rates smaller particles can allow a shorter electronic conduction path, so reducing the resistance experienced by Li ions during diffusion.

引用

页码：12598 / 12603

页数：6

共 34 条

[1] AMIN P, 2007, J ELECTROCHEM SOLID, V10, pA13
[2] The source of first-cycle capacity loss in LiFePO4
Andersson, AS
Thomas, JO
[J]. JOURNAL OF POWER SOURCES, 2001, 97-8 : 498 - 502
[3] Local structure in the Li-ion battery cathode material Lix(MnyFe1-y)PO4 for 0 < x ≤ 1 and y=0.0, 0.5 and 1.0
Burba, Christopher A.
Frech, Roger
[J]. JOURNAL OF POWER SOURCES, 2007, 172 (02) : 870 - 876
[4] Synthesis and characterization of high-density LiFePO4/C composites as cathode materials for lithium-ion batteries
Chang, Zhao-Rong
Lv, Hao-Jie
Tang, Hong-Wei
Li, Hua-Ji
Yuan, Xiao-Zi
Wang, Haijiang
[J]. ELECTROCHIMICA ACTA, 2009, 54 (20) : 4595 - 4599
[5] Axial divergence in a conventional X-ray powder diffractometer. I. Theoretical foundations
Cheary, RW
Coelho, AA
[J]. JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1998, 31 (pt 6) : 851 - 861
[6] Axial divergence in a conventional X-ray powder diffractometer. II. Realization and evaluation in a fundamental-parameter profile fitting procedure
Cheary, RW
Coelho, AA
[J]. JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1998, 31 (pt 6) : 862 - 868
[7] A FUNDAMENTAL PARAMETERS APPROACH TO X-RAY LINE-PROFILE FITTING
CHEARY, RW
COELHO, A
[J]. JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1992, 25 (pt 2) : 109 - 121
[8] Electron microscopy study of the LiFePO4 to FePO4 phase transition
Chen, GY
Song, XY
Richardson, TJ
[J]. ELECTROCHEMICAL AND SOLID STATE LETTERS, 2006, 9 (06) : A295 - A298
[9] The effect of carbon coating thickness on the capacity of LiFePO4/C composite cathodes
Cho, Yung-Da
Fey, George Ting-Kuo
Kao, Hsien-Ming
[J]. JOURNAL OF POWER SOURCES, 2009, 189 (01) : 256 - 262
[10] Electronically conductive phospho-olivines as lithium storage electrodes
Chung, SY
Bloking, JT
Chiang, YM
[J]. NATURE MATERIALS, 2002, 1 (02) : 123 - 128

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