Differential voltage analyses of high-power lithium-ion cells. 4. Cells containing NMC

被引：156

作者：

Bloom, Ira ^{[1
]}

Walker, Lee K. ^{[1
]}

Basco, John K. ^{[1
]}

Abraham, Daniel P. ^{[1
]}

Christophersen, Jon P. ^{[2
]}

Ho, Chinh D. ^{[2
]}

机构：

[1] Argonne Natl Lab, Argonne, IL 60439 USA

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

来源：

JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 03期

关键词：

Lithium-ion battery; Capacity fade; Battery testing; IMPEDANCE RISE; CATHODE COMPOSITION; CAPACITY FADE; BATTERIES; ELECTRODES; ELECTROCHEMISTRY; SURFACE;

D O I：

10.1016/j.jpowsour.2009.08.019

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：

Cells with and without a LiC(2)O(4)BF(2) electrolyte additive and that contained Li(1.05)(Mn(1/3)Co(1/3)Ni(1/3))(0.95)O(2) (NMC) positive electrodes were tested for calendar and cycle life at 60% state of charge. The temperatures used in these tests were 25 and 45 degrees C (cycle life) and 45 and 55 degrees C (calendar life). An analysis of the C/25 capacity data shows that the C/25 capacity decreases with the square root of time. The additive slowed down the rate of capacity decline. The C/25 data were subjected to differential voltage analysis to determine the possible cause of the capacity decrease and at which electrode the capacity decrease was occurring. Data from full cells and half-cells were compared to elucidate individual electrode contributions. This analysis indicated that lithium-capacity-consuming side reactions were Occurring primarily at the negative electrode. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：877 / 882

页数：6

共 19 条

[1] Performance degradation of high-power lithium-ion cells- Electrochemistry of harvested electrodes [J].