Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5149215 | Journal of Power Sources | 2017 | 10 Pages |
Abstract
The study reports on realization and electrochemical testing of prototype Si-alloy/Graphite|LiNi0.5Mn0.3Co0.2O2 batteries. Water soluble polyacrylic acid (PAA), used as the only binder at the anode side, demonstrates excellent dispersant and binding properties. Sedimentation tests and rheological measurements show remarkable stability and mostly a thinning behavior of the non-Newtonian type of slurry. The cathode is processed in N-Methylpyrrolidone based slurry using polyvinylidene fluoride (PVDF) as the binding agent. The electronic conductivities of the manufactured Si-alloy/Graphite and LiNi0.5Mn0.3Co0.2O2 electrodes are evaluated. Furthermore, the cathode and anode electrochemical behavior is initially studied in half-cells, and subsequently in full Li-ion stacked prototype soft pouch-cells (1.22Â Ah). It is demonstrated that the manufactured prototype cells can sustain about 290 charge/discharge galvanostatic cycles before the retained capacity drops below 80%. Cell aging is monitored using Electrochemical Impedance Spectroscopy (EIS), whereas post-mortem SEM analysis of electrodes cross-section is used to shed light on the causes of performance degradation of the cells.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Mario Marinaro, Dong-hwan Yoon, Giulio Gabrielli, Petra Stegmaier, Egbert Figgemeier, Paul C. Spurk, Daniël Nelis, Gregory Schmidt, Jerome Chauveau, Peter Axmann, Margret Wohlfahrt-Mehrens,