Self‐Assembled 3D Foam‐Like NiCo2O4 as Efficient Catalyst for Lithium Oxygen Batteries |
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| Authors: | Lili Liu Jun Wang Yuyang Hou Jun Chen Hua‐Kun Liu Jiazhao Wang Yuping Wu |
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| Affiliation: | 1. New Energy and Materials Laboratory (NEML), College of Energy, Nanjing Tech University, Nanjing, China;2. Institute for Superconducting and Electronic Materials (ISEM), University of Wollongong, Wollongong, Australia;3. Intelligent Polymer Research Institute (IPRI), University of Wollongong, Wollongong, Australia |
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| Abstract: | A self‐assembled 3D foam‐like NiCo2O4 catalyst has been synthesized via a simple and environmental friendly approach, wherein starch acts as the template to form the unique 3D architecture. Interestingly, when employed as a cathode for lithium oxygen batteries, it demonstrates superior bifunctional electrocatalytic activities toward both the oxygen reduction reaction and the oxygen evolution reaction, with a relatively high round‐trip efficiency of 70% and high discharge capacity of 10 137 mAh g?1 at a current density of 200 mA g?1, which is much higher than those in previously reported results. Meanwhile, rotating disk electrode measurements in both aqueous and nonaqueous electrolyte are also employed to confirm the electrocatalytic activity for the first time. This excellent performance is attributed to the synergistic benefits of the unique 3D foam‐like structure and the intrinsically high catalytic activity of NiCo2O4. |
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| Keywords: | 3D foam‐like materials Li2O2 oxygen evolution reactions oxygen reduction reactions overpotential lithium oxygen batteries |
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