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

[1]

ALLIATA D, 2000, 10 INT M LITH BATT C

[2] Fine-particle lithium iron phosphate LiFePO4 synthesized by a new low-cost aqueous precipitation technique [J].

Arnold, G ;

Garche, J ;

Hemmer, R ;

Ströbele, S ;

Vogler, C ;

Wohlfahrt-Mehrens, A .

JOURNAL OF POWER SOURCES, 2003, 119 :247-251

[3]

AUDEMER A, 2003, Patent No. 2004001881

[4] A carbothermal reduction method for the preparation of electroactive materials for lithium ion applications [J].

Barker, J ;

Saidi, MY ;

Swoyer, JL .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (06) :A684-A688

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

Chung, SY ;

Bloking, JT ;

Chiang, YM .

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

[7] A novel concept for the synthesis of an improved LiFePO4 lithium battery cathode [J].

Croce, F ;

D'Epifanio, A ;

Hassoun, J ;

Deptula, A ;

Olczac, T ;

Scrosati, B .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2002, 5 (03) :A47-A50

[8] Catalytic effect of iron oxide on carbon/carbon composites during graphitization [J].

Dhakate, SR ;

Mathur, RB ;

Bahl, OP .

CARBON, 1997, 35 (12) :1753-1756

[9] Effect of surface carbon structure on the electrochemical performance of LiFePO4 [J].

Doeff, MM ;

Hu, YQ ;

McLarnon, F ;

Kostecki, R .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2003, 6 (10) :A207-A209

[10] Impact of LiFePO4/C composites porosity on their electrochemical performance [J].

Dominko, R ;

Goupil, JM ;

Bele, M ;

Gaberscek, M ;

Remskar, M ;

Hanzel, D ;

Jamnik, J .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2005, 152 (05) :A858-A863

← 1 2 3 4 →