Some Possible Approaches for Improving the Energy Density of Li-Air Batteries

被引:118
作者
Andrei, P. [1 ]
Zheng, J. P. [1 ,2 ]
Hendrickson, M. [3 ]
Plichta, E. J. [3 ]
机构
[1] Florida A&M Univ, Dept Elect & Comp Engn, Tallahassee, FL 32310 USA
[2] Florida State Univ, Ctr Adv Power Syst, Tallahassee, FL 32310 USA
[3] USA, CERDEC, Ft Monmouth, NJ 07703 USA
关键词
LITHIUM/OXYGEN BATTERY; ORGANIC ELECTROLYTE; CELL;
D O I
10.1149/1.3486114
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A physics-based model is proposed for the simulation of Li-air batteries. The model is carefully calibrated against published data and is used to simulate standard Li-air batteries with a nonaqueous (organic) electrolyte. The specific capacity is mainly limited by the oxygen diffusion length, which is a function of the oxygen diffusivity in the electrolyte and the discharge current density. Various approaches to increase the specific capacity of the cathode electrode and the energy density of Li-air batteries are discussed. To increase the specific capacity and energy density, it is more efficient to use a nonuniform catalyst that enhances the reaction rate only at the separator-cathode interface than a catalyst uniformly distributed. Using uniformly distributed catalysts enhances the current and power density of the cell but does not increase significantly the specific capacity and energy density. The specific capacity and energy density can be increased by suppressing the reaction rate at the oxygen-entrance interface to delay the pinch-off of the conduction channel in this region. Other possibilities to enhance the energy density such as using solvents with high oxygen solubility and diffusivity and partly wetted electrodes are discussed. (C) 2010 The Electrochemical Society. [DOI: 10.1149/1.3486114] All rights reserved.
引用
收藏
页码:A1287 / A1295
页数:9
相关论文
共 21 条
[1]   A polymer electrolyte-based rechargeable lithium/oxygen battery [J].
Abraham, KM ;
Jiang, Z .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (01) :1-5
[2]   Mathematical modeling of secondary lithium batteries [J].
Botte, GG ;
Subramanian, VR ;
White, RE .
ELECTROCHIMICA ACTA, 2000, 45 (15-16) :2595-2609
[3]   MODELING OF GALVANOSTATIC CHARGE AND DISCHARGE OF THE LITHIUM POLYMER INSERTION CELL [J].
DOYLE, M ;
FULLER, TF ;
NEWMAN, J .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1993, 140 (06) :1526-1533
[4]  
*FL STAT U, RANDFLUX P US MAN V
[5]   Li-air batteries: A classic example of limitations owing to solubilities [J].
Kowalczk, Ian ;
Read, Jeffery ;
Salomon, Mark .
PURE AND APPLIED CHEMISTRY, 2007, 79 (05) :851-860
[6]  
Lide D. R., 1996, CRC Handbook of Chemistry and Physics
[7]  
Newman J., 2004, ELECTROCHEMICAL SYST, V3rd
[8]   Electrochemical characterisation and modelling of the mass transport phenomena in LiPF6-EC-EMC electrolyte [J].
Nyman, Andreas ;
Behm, Marten ;
Lindbergh, Goran .
ELECTROCHIMICA ACTA, 2008, 53 (22) :6356-6365
[9]   Oxygen transport properties of organic electrolytes and performance of lithium/oxygen battery [J].
Read, J ;
Mutolo, K ;
Ervin, M ;
Behl, W ;
Wolfenstine, J ;
Driedger, A ;
Foster, D .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (10) :A1351-A1356
[10]   Characterization of the lithium/oxygen organic electrolyte battery [J].
Read, J .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2002, 149 (09) :A1190-A1195