A mathematical model for intercalation electrode behavior I. Effect of particle-size distribution on discharge capacity

被引:68
作者
Nagarajan, GS [1 ]
Van Zee, JW
Spotnitz, RM
机构
[1] Univ S Carolina, Dept Chem Engn, Columbia, SC 29208 USA
[2] Hoechst Celanese Corp, Charlotte, NC 28273 USA
关键词
D O I
10.1149/1.1838344
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A mathematical model is presented to study the effect of the particle size distribution (PSD) on the galvanostatic discharge behavior of the lithium/separator/intercalation electrode system. A recently developed packing theory has been incorporated into a first-principles model of an intercalation electrode to provide a rational basis for including the effect of PSD on packing density. The model is used to investigate how binary mixtures of spherical particles affect electrode capacity. The electrode capacity of an insertion electrode is calculated for various parameters including applied current density, thickness of the electrode, and volume fraction, size, and size ratio of the particles. The model shows that an electrode comprised of two different sized particles can have a significantly higher capacity than an electrode consisting of single-sized particles. However, increasing the packing density increases the liquid-phase diffusion resistance. As a result of the trade-off between packing density and liquid-phase diffusion resistance, discharge capacity can be optimized by adjusting the particle size, volume fraction of large and small particles, and the size ratio. Pulse discharge of an intercalation electrode comprised of two different sized particles shows a marked difference in transient behavior from that of an electrode which has single-sized particles. Since there are many parameters which control the performance of the electrode, use of this model should aid greatly in making superior electrodes.
引用
收藏
页码:771 / 779
页数:9
相关论文
共 16 条
[1]  
Brenan K. E., 1989, NUMERICAL SOLUTION I
[2]   THEORETICAL-STUDY OF A COMPOSITE ELECTRODE USING AN INTERCALATION COMPOUND - INFLUENCE OF THE PARTICLE-SIZE DISTRIBUTION ON THE DEPTH OF DISCHARGE [J].
DALARD, F ;
DEROO, D ;
FOSCALLO, D ;
MERIENNE, JL .
JOURNAL OF POWER SOURCES, 1985, 14 (1-3) :209-213
[3]   Analysis of capacity-rate data for lithium batteries using simplified models of the discharge process [J].
Doyle, M ;
Newman, J .
JOURNAL OF APPLIED ELECTROCHEMISTRY, 1997, 27 (07) :846-856
[4]   SIMULATION AND OPTIMIZATION OF THE DUAL LITHIUM ION INSERTION CELL [J].
FULLER, TF ;
DOYLE, M ;
NEWMAN, J .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1994, 141 (01) :1-10
[5]  
JOHNSON BA, IN PRESS J POWER SOU
[6]   A MODEL FOR THE DELIVERABLE CAPACITY OF THE TIS2 ELECTRODE IN A LI/TIS2 CELL [J].
MAO, Z ;
WHITE, RE .
JOURNAL OF POWER SOURCES, 1993, 43 (1-3) :181-191
[7]  
MEREDITH RE, 1962, ADVANCES ELECTROCHEM, V2, P15
[8]  
Newman J., 1991, ELECTROCHEMICAL SYST
[9]   EFFECT OF PARTICLE-SIZE ON IRON-PHTHALOCYANINE CATHODES IN SECONDARY LITHIUM CELLS [J].
OKADA, S ;
YAMAKI, J .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1989, 136 (09) :2437-2440
[10]   AN INVESTIGATION OF PARAMETERS AFFECTING THE APPARENT CHEMICAL DIFFUSION-COEFFICIENT IN COMPOSITE ELECTRODES IN SOLID-STATE CELLS [J].
ROGERS, MD ;
VINCENT, CA .
ELECTROCHIMICA ACTA, 1991, 36 (10) :1643-1647