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P: Fachverband Plasmaphysik

P 5: Poster I

P 5.8: Poster

Dienstag, 31. August 2021, 14:00–16:00, P

Nitrogen-doped NiCo₂O₄ on carbon paper as a self-supported air cathode for Rechargeable Zn-air batteries — •He Li, Jan Benedikt, and Sadegh Askari — Institute of Experimental and Applied Physics, Kiel University, Germany

A noble-metal-free bifunctional oxygen evolution/reduction catalyst with outstanding activity and stability is of great importance for the development of rechargeable Zn-air batteries. NiCo₂O₄, a typical spinel oxide, is considered as one of the most promising bifunctional catalyst, but the electrocatalytic performance of this material is still unsatisfactory due to its poor conductivity and low surface area. Herein, we report an effective way to fabricate nitrogen-doped NiCo₂O₄ on carbon paper as a binder-free air cathode for rechargeable Zn-air batteries. After nitrogen plasma treatment, this modified material exhibits higher electrocatalytic performance than pristine NiCo₂O₄ because of the enhanced conductivity and more active sites. Both the liquid-state and the flexible all-solid-state Zn-air batteries with engineered nitrogen-doped NiCo₂O₄ show high operating potentials and excellent stability. This work provides an efficient and reliable approach for the modification of self-supported catalysts, thereby contributing to the development of rechargeable Zn-air batteries.