Effect of overcharge on Li(Ni0.5Mn0.3Co0.2)O2/Graphite cells-effect of binder
Abstract
Cells based on NMC/graphite, containing styrene-butadiene rubber/carboxymethylcellulose binder in the anodes and pVdF latex/carboxymethylcellulose in the cathodes, were systematically overcharged to 100, 120, 140, 160, 180, 250% and 270% state-of-charge. The impact of the binder was characterized by elemental analysis, SEM, and HPLC. These results were compared to similar cells just using the poly (vinylidene difluoride) binder. Not only did the binder impact the rate of transition metal transport from the cathode to the anode, it also had a marked effect on the microstructure and composition of the materials on the anode surface.
- Publication:
-
Journal of Power Sources
- Pub Date:
- February 2020
- DOI:
- 10.1016/j.jpowsour.2019.227414
- Bibcode:
- 2020JPS...44827414D
- Keywords:
-
- Lithium-ion battery;
- Overcharge;
- Microstructure;
- SEI;
- Anode;
- Binder