Analysis and prediction of the open circuit potential of lithium-ion cells

被引：79

作者：

Schmidt, Jan Philipp ^{[1
]}

Hai Yen Tran ^{[2
]}

Richter, Jan ^{[1
]}

Ivers-Tiffee, Ellen ^{[1
]}

Wohlfahrt-Mehrens, Margret ^{[2
]}

机构：

[1] KIT, IWE, D-76131 Karlsruhe, Germany

[2] ZSW Ctr Solar Energy & Hydrogen Res, D-89081 Ulm, Germany

来源：

JOURNAL OF POWER SOURCES | 2013年 / 239卷

关键词：

Lithium-ion; Open circuit potential; Model; Diagnosis; Blend; Analysis; AGING MECHANISMS; BATTERIES; ELECTRODES; INSERTION;

D O I：

10.1016/j.jpowsour.2012.11.101

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：

A model is presented, which allows quantitative analysis as well as prediction of the open circuit potential of lithium-ion cells. Furthermore, the model determines half-cell potentials of already stressed lithium-ion cells, using a data set accomplished just once from half-cell potentials of a new reference cell. Its capability to describe thereby two relevant degradation processes, namely, (i) loss of active mass, and, (ii) loss of active lithium, is experimentally verified on a LiNi0.8Co0.15Al0.05O2 (NCA)/LiCoO2 (LCO) blend cell. A further extension of the model allows the prediction of the open circuit potential of a blend cathode with various blend ratios as well as the analysis of unknown blend ratios. This ability is experimentally verified for cathodes made of LiNi0.8Co0.15Al0.05O2 (NCA)/LiMn2O4 (LMO) blends. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：696 / 704

页数：9

共 24 条

[1] Modeling the impedance versus voltage characteristics of LiNi0.8Co0.15Al0.05O2 [J].