Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1614024 | Journal of Alloys and Compounds | 2013 | 6 Pages |
Abstract
LiFePO4 is a promising cathode material for lithium ion batteries and is prepared by a hydrothermal method. However, its practical application is limited due to its poor conductivity. In order to improve the electronic conductivity, we added poly (sodium 4-styrenesulfonate) (PSS) and multi walled carbon nanotube (MWCNT) in LiFePO4. In the results, PSS stacks and forms a layer about 3-6 nm around the surface of LiFePO4 particles. MWCNT provides pathways for electron transport. Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic discharge testing results indicate that LiFePO4/PSS-MWCNT composite exhibits higher discharge capacity than pure LiFePO4. LiFePO4/PSS(2.5%)-MWCNT(2.5%) shows the best discharge capacity of 144 mAh gâ1 at 2nd cycle, and high electronic conductivity of 6.3 Ã 10â3 S cmâ1.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Van Hiep Nguyen, Wan Lin Wang, En Mei Jin, Hal-Bon Gu,