Dual active material composite cathode structures for Li-ion batteries

The efficacy of composite Li-ion battery cathodes made by mixing active materials that possessed either high-rate capability or high specific energy was examined. The cathode structures studied contained carbon-coated LiFePO 4 and either Li[Li 0.17Mn 0.58Ni 0.25]O 2 or LiCoO 2. These active material...

Full description

Saved in:
Bibliographic Details
Published in:Journal of power sources 2008-03, Vol.177 (2), p.528-536
Main Authors: Whitacre, J.F., Zaghib, K., West, W.C., Ratnakumar, B.V.
Format: Article
Language:English
Subjects:
Applied sciences
Batteries
Cathodes
Composite materials
Correlation
Direct energy conversion and energy accumulation
Discharge
Effectiveness
Electric batteries
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Electrodes
Exact sciences and technology
Hybrid
Li Battery
LiCoO 2
LiFePO 4
LiNiMnO 2
Lithium-ion batteries
Mixed active material cathodes
Polarization
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The efficacy of composite Li-ion battery cathodes made by mixing active materials that possessed either high-rate capability or high specific energy was examined. The cathode structures studied contained carbon-coated LiFePO 4 and either Li[Li 0.17Mn 0.58Ni 0.25]O 2 or LiCoO 2. These active materials were arranged using three different electrode geometries: fully intermixed, fully separated, or layered. Discharge rate studies, cycle-life evaluation, and electrochemical impedance spectroscopy studies were conducted using coin cell test structures containing Li-metal anodes. Results indicated that electrode configuration was correlated to rate capability and degree of polarization if there was a large differential between the rate capabilities of the two active material species.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2007.11.076