Crosslinked Carbon Nanotube Aerogel Films Decorated with Cobalt Oxides for Flexible Rechargeable Zn–Air Batteries |
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| Authors: | Sha Zeng Hongyuan Chen Han Wang Xiao Tong Minghai Chen Jiangtao Di Qingwen Li |
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| Affiliation: | 1. School of Nano‐Technology and Nano‐Bionics, University of Science and Technology of China, Hefei, China;2. Key Lab of Nanodevices and Applications and Division of Advanced Nanomaterials, Suzhou Institute of Nano‐Tech and Nano‐Bionics, Chinese Academy of Sciences, Suzhou, China |
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| Abstract: | Air electrodes with high catalytic activity are of great importance for rechargeable zinc–air batteries. Herein, a flexible, binder‐free composite air electrode for zinc–air batteries is reported, which utilizes a lightweight, conductive, and crosslinked aerogel film of carbon nanotubes (CNTs) functioned as a 3D catalyst‐supporting scaffold for bifunctional cobalt (II/III) oxides and as a current collector. The composite electrode shows high catalytic activities for both oxygen reduction reaction and oxygen evolution reaction, resulting from the synergistic effect of nitrogen‐doped CNTs and spinel Co3O4 nanoparticles. Solid‐state Zn–air batteries assembled using such free‐standing air electrodes (without the need of additional current collectors) are bendable and show low resistances, low charge/discharge overpotentials, and a high cyclic stability. |
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| Keywords: | air electrodes carbon nanotube aerogel films crosslinked networks lightweight Zn– air battery |
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