Aluminum Metal-Organic Batteries with Integrated 3D Thin Film Anodes
Journal article, 2020

Aluminum 3D thin film anodes fully integrated with a separator are fabricated by sputtering and enable rechargeable aluminum metal batteries with high power performance. The 3D thin film anodes have an approximately four to eight times larger active surface area than a metal foil, which significantly both reduces the electrochemical overpotential, and improves materials utilization. In full cells with organic cathodes, that is, aluminum metal-organic batteries, the 3D thin film anodes provide 165 mAh g(-1)at 0.5 C rate, with a capacity retention of 81% at 20 C, and 86% after 500 cycles. Post-mortem analysis reveals structural degradation to limit the long-term stability at high rates. As the multivalent charge carrier active here is AlCl2+, the realistic maximal specific energy, and power densities at cell level are approximate to 100 Wh kg(-1)and approximate to 3100 W kg(-1), respectively, which is significantly higher than the state-of-the-art for Al batteries.

organic cathodes

sputtering

3D anodes

aluminum batteries

thin films

Author

Niklas Lindahl

University of Gothenburg

Chalmers, Physics, Materials Physics

Jan Bitenc

National Institute of Chemistry

Robert Dominko

National Institute of Chemistry

University of Ljubljana

Centre national de la recherche scientifique (CNRS)

Patrik Johansson

Chalmers, Physics, Materials Physics

Advanced Functional Materials

1616-301X (ISSN)

Vol. 30 51 2004573

Subject Categories

Materials Chemistry

Other Chemical Engineering

Other Chemistry Topics

DOI

10.1002/adfm.202004573

More information

Latest update

1/5/2021 7