Optimization of carbon coatings on LiFePO4

被引：215

作者：

Doeff, Marca M. ^{[1
]}

Wilcox, James D.

Kostecki, Robert

Lau, Grace

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA

来源：

JOURNAL OF POWER SOURCES | 2006年 / 163卷 / 01期

关键词：

lithium iron phosphate; lithium batteries; carbon; conductive coatings;

D O I：

10.1016/j.jpowsour.2005.11.075

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：

The electrochemical performance of LiFePO4 in lithium cells is strongly dependent on the structure (disordered/graphene or D/G ratio) of the in situ carbon produced during synthesis from carbon-containing precursors. Addition of pyromellitic acid (PA) prior to final calcination results in lower D/G ratios, yielding a higher-rate material. Further, improvements in electrochemical performance are realized when graphitization catalysts such as ferrocene are also added during LiFePO4 preparation, although overall carbon content is still less than 2 wt.%. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：180 / 184

页数：5

共 32 条

[11] Synthesis of carbon nanotubes over Fe catalyst on aluminium and suggested growth mechanism [J].

Emmenegger, C ;

Bonard, JM ;

Mauron, P ;

Sudan, P ;

Lepora, A ;

Grobety, B ;

Züttel, A ;

Schlapbach, L .

CARBON, 2003, 41 (03) :539-547

[12] Comparison between different LiFePO4 synthesis routes and their influence on its physico-chemical properties [J].

Franger, S ;

Le Cras, F ;

Bourbon, C ;

Rouault, H .

JOURNAL OF POWER SOURCES, 2003, 119 :252-257

[13]

GABRISCH H, 2006, IN PRESS ELECTROCHEM

[14] Nano-network electronic conduction in iron and nickel olivine phosphates [J].

Herle, PS ;

Ellis, B ;

Coombs, N ;

Nazar, LF .

NATURE MATERIALS, 2004, 3 (03) :147-152

[15] Surface chemistry of carbon-treated LiFePO4 particles for Li-ion battery cathodes studied by PES [J].

Herstedt, M ;

Stjerndahl, M ;

Nytén, A ;

Gustafsson, T ;

Rensmo, H ;

Siegbahn, H ;

Ravet, N ;

Armand, M ;

Thomas, JO ;

Edström, K .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2003, 6 (09) :A202-A206

[16] Synthesis of LiFePO4 cathode material by microwave processing [J].

Higuchi, M ;

Katayama, K ;

Azuma, Y ;

Yukawa, M ;

Suhara, M .

JOURNAL OF POWER SOURCES, 2003, 119 :258-261

[17] Electrochemical performance of sol-gel synthesized LiFePO4 in lithium batteries [J].

Hu, YQ ;

Doeff, MM ;

Kostecki, R ;

Fiñones, R .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2004, 151 (08) :A1279-A1285

[18] 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

[19] Topological changes of vapor grown carbon fibers during heat treatment [J].

Kim, YA ;

Matusita, T ;

Hayashi, T ;

Endo, M ;

Dresselhaus, MS .

CARBON, 2001, 39 (11) :1747-1752

[20]

Kinoshita Kim., 1988, CARBON ELECTROCHEMIC

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