Cell for felt electrode characterization
The present invention relates to a cell for felt electrode characterization which analyzes a characteristic of a felt electrode used in a redox flow battery. According to the present invention, the cell for felt electrode characterization can accurately analyze an electrical characteristic of the felt electrode by adjusting contact strength applied to the working electrode to be constant by adjusting the thickness of the first support that supports one side of the working electrode.
1. A cell for felt electrode characterization, the cell comprising:
a reference electrode portion having
an electrolyte chamber in which a space filled with an electrolyte is formed and having a top surface, a first side surface, and a second side surface opposite to the first side surface, and
a reference electrode disposed at the top surface of the electrolyte chamber and configured to provide a reference value;
a working electrode portion disposed at the first side surface of the electrolyte chamber and having a working electrode provided as a felt electrode, and configured to receive a first current from the working electrode; and
a counter electrode portion disposed at the second side surface of the electrolyte chamber and having a counter electrode, and configured to maintain charge balance according to transfer of electrons from the working electrode portion,
wherein the working electrode portion comprises:
a first flow frame contacted with the first side surface of the electrolyte chamber and having a first opening to receive the electrolyte from electrolyte chamber;
an insulation film contacted with the first flow frame and having a first receiving hole formed at a center thereof to receive the working electrode;
a first bipolar plate contacted with the insulation film and the working electrode so as to form a first closed space by the first opening and the first receiving hole, wherein the first closed space prevents the electrolyte received in the first opening from being discharged to outside the cell; and
a first measurement plate contacted with the first bipolar plate and configured to receive the first current applied from the working electrode via the first bipolar plate,
wherein the first measurement plate, the first bipolar plate, the insulation film, and the first flow frame are sequentially disposed from the first measurement plate,
wherein the counter electrode portion comprises:
a second flow frame contacted with the second side surface of the electrolyte chamber and having a second opening to receive the electrolyte from electrolyte chamber;
a third flow frame contacted with the second flow frame and having a second receiving hole formed at a center thereof to receive the counter electrode;
a second bipolar plate contacted with the third flow frame and the counter electrode so as to form a second closed space by the second opening and the second receiving hole, wherein the second closed space prevents the electrolyte received in the second receiving hole of the third flow frame and the second opening of the second flow frame from being discharged to outside the cell; and
a second measurement plate contacted with the second bipolar plate and configured to receive a second current applied from the counter electrode via the second bipolar plate,
wherein the second measurement plate, the second bipolar plate, the third flow frame, and the second flow frame are sequentially disposed from the second measurement plate.
2. The cell of claim 1 ,
wherein the first flow frame comprises a first support portion formed across the first opening to be contacted with the working electrode, and
wherein the first support portion is formed with a thickness thinner than a thickness of a rest of the first frame to form a space in which the working electrode is seated.
3. The cell of claim 2 , wherein a pressure applied to the working electrode is determined by a depth of a step of the first support portion.
4. The cell of claim 1 ,
wherein the second flow frame comprises a second support portion formed across the second opening to be contacted with the counter electrode.
5. The cell of claim 4 , wherein the first flow frame, the second flow frame, the third flow frame, and the insulation film include polytetrafluoroethylene (PTFE).
6. The cell of claim 1 , further comprising
a case coupled to the working electrode portion and the counter electrode with the electrolyte chamber therebetween.
7. The cell of claim 6 , wherein the case comprises:
a first case coupled to the working electrode portion;
a second case coupled to the counter electrode portion; and
a fixing member coupled to the first case and the second case with the electrolyte chamber therebetween.