About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage VII
|
Presentation Title |
Investigation of Cost-effective AlCl3-urea Ionic Liquid Analog for Al-ion Batteries |
Author(s) |
Monu Malik, Kok Long Ng, Gisele Azimi |
On-Site Speaker (Planned) |
Monu Malik |
Abstract Scope |
The present study investigates the physicochemical properties of cost-effective AlCl3-urea ionic liquid analogs (ILAs) for aluminum-ion batteries. The neutral and the acidic regions for AlCl3/urea molar compositions was investigated using nuclear magnetic resonance spectroscopy (NMR), linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), and symmetrical cell testing to determine the speciation of ionic moieties, electrochemical stability, and ionic conductivity of this complex system. The physical characterization shows that only 1.2–1.5 molar compositions are suitable for Al-ion batteries at room temperature where 1.3 have the highest ionic conductivity. The NMR results indicate Al2Cl7– is dominating species for electrodeposition of aluminum at higher molar composition compared with AlCl2·(urea)2+, while the relative amount of AlCl4– remains almost unchanged across investigated compositions. The Al-ion battery prepared using aluminum anode and graphene nanoplatelets cathode delivered the highest specific capacity of 74 mAh g–1 with 1.4 molar composition ILAs at 100 mA g–1. |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, Characterization, Aluminum |