This study presents a simple method to synthesize cobalt and nitrogen codoped carbon nanotubes as bifunctional oxygen electrocatalysts for rechargeable Zn-air batteries. The resulting batteries exhibit high power density, large specific capacity, and long cycling life. This work opens up a promising avenue for the development of high-performance electrocatalysts.
The development of efficient and facile strategies to prepare metal and nitrogen codoped carbon (M-NC) materials as oxygen electrocatalysts in rechargeable Zn-air batteries with high performance and a long life is challenging. Herein, we report a simple route to synthesize cobalt and nitrogen codoped carbon nanotubes (denoted as Co/N-CNT) as bifunctional oxygen electrocatalysts for rechargeable Zn-air batteries (ZABs). The Co/N-CNT are fabricated through the surface modification of carbon nanotubes with cobalt salt and melamine followed by pyrolysis, which delivers outstanding oxygen reduction/evolution reaction (ORR/OER) activity with a low overall potential gap (Delta E = 0.77 V) and remarkable durability. The home-made Zn-air batteries exhibit a high power density (130 mW cm(-2) vs. 82 mW cm(-2)), a large specific capacity of (864 mA h g(-1) (Zn) vs. 785 mA h g(Zn)(-1)), and a long cycling life (1200 h vs. 60 h) in both aqueous and solid media. This work opens an avenue for the reasonable surface modification of carbon nanotubes with various metals and heteroatoms to achieve high-performance electrocatalysts for clean and sustainable energy conversion and storage devices.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据