A study on time-dependent low temperature power performance of a lithium-ion battery

被引:97
作者
Cho, Hyung-Man [1 ]
Choi, Woo-Sung [1 ]
Go, Joo-Young [2 ]
Bae, Sang-Eun [3 ]
Shin, Heon-Cheol [1 ]
机构
[1] Pusan Natl Univ, Sch Mat Sci & Engn, Pusan 609735, South Korea
[2] SB LiMot, R&D Team, Yongin 446577, Gyeonggi Do, South Korea
[3] Korea Atom Energy Res Inst, Nucl Chem Res Div, Taejon 305353, South Korea
基金
新加坡国家研究基金会;
关键词
Low temperature; Polarization; Power; Lithium battery; Pulse discharging; LI-ION; COMPUTER-SIMULATIONS; INSERTION CELL; IMPEDANCE; ELECTRODE; GRAPHITE; MODEL; LAYER; CHEMISTRIES; CAPACITY;
D O I
10.1016/j.jpowsour.2011.09.111
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
Time-dependent elementary polarizations of a lithium-ion battery are quantitatively investigated below room temperature in an attempt to determine the critical factors affecting low temperature power decline. From three-electrode impedance measurements and the theoretical analysis of the phenomenological equivalent circuit, the proportional contribution of the internal resistances to the total polarization is satisfactorily analyzed as a function of the pulse discharging time. The results prove that the interfacial charge-transfer resistances of the anode (graphite) and the cathode (lithium cobalt dioxide) make the highest contributions to the low temperature power decline. On this basis, a strategy for the material design to enhance the low temperature performance is suggested with two examples of surface modification and hybridization with an electrochemical capacitor. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:273 / 280
页数:8
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