Effect of cathode composition on impedance rise in high-power lithium-ion cells: Long-term aging results

被引：20

作者：

Bloom, I

Potter, BG

Johnson, CS

Gering, KL

Christophersen, JP

机构：

[1] Argonne Natl Lab, Electrochem Technol Program, Argonne, IL 60439 USA

[2] Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA

来源：

JOURNAL OF POWER SOURCES | 2006年 / 155卷 / 02期

关键词：

impedance rise; lithium-ion; cycle life; calendar life;

D O I：

10.1016/j.jpowsour.2005.05.008

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：

Extended cycle- and calendar-life testing of lithium-ion cells has shown the effect of aluminum concentration in the cathode on the area-specific impedance versus time behavior of the cell. In cells with a LiNi0.8Co0.15Al0.05O2 (5% Al) cathode, the change in mechanism from t(1/2) to t occurred at about 35 weeks. Increasing the aluminum concentration to 10% (LiNi0.8Co0.1Al0.1O2) delayed the change for, approximately, an additional 30 weeks. The factors affecting the rate of increase during the parabolic and linear portions of the curve depended on cathode composition and particle size. The difference in the time it took for the change in mechanism was related to the cathode composition. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：415 / 419

页数：5

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