About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Inductance-Dominant Impedance Discovered in Polyelectrolyte |
| Author(s) |
Deborah D.L. Chung, Sathwika Chittluri |
| On-Site Speaker (Planned) |
Deborah D.L. Chung |
| Abstract Scope |
Polyelectrolyte is a solid-state electrolyte (ionic conductor) important for solid-state batteries and supercapacitors. This work discovers that polyelectrolyte exhibits inductance-dominant impedance, with θ reaching 77° and reactance reaching 92 kΩ, while the resistance is 21 kΩ. The positive reactance is dominated by the inductance, which is attributed to the entropy-driven multidirectional movement of the ions in response to an applied voltage. The polyelectrolyte is poly(ethylene oxide) (PEO) with lithium ions provided by dissolved lithium perchlorate trihydrate. It is in the form of a coating on a glass slide. The reactance and θ increase with increase in lithium ion content (PEO/Li mole ratio 7.6-13.0), thickness (30-120 µm), inter-electrode distance (20-50 mm), or frequency (0.5-5.0 kHz). The 800% increase in reactance with frequency and 140% increase in reactance with distance indicate that the inductance dominates over the capacitance in governing the reactance. The impedance and θ are measured using an LCR meter. |