Scalable Synthesis of Fe/N-Doped Porous Carbon Nanotube Frameworks for Aqueous Zn-Air Batteries

作者：Li, Fuyun; Li, Heng; Liu, Xiaoxiao; Wang, Libin; Lu, Yue; Hu, Xianluo^*

来源：Chemistry - A European Journal, 2019, 25(2): 635-641.

DOI：10.1002/chem.201804643

• hydroxyapatite nanowires
• interfacial assembly
• porous carbons
• template synthesis
• Zn-air batteries

Aqueous Zn-air batteries are emerging to be ideal next-generation energy-storage devices with high safety and high energy/power densities. However, the rational design and fabrication of low-cost, highly efficient, and durable electrocatalysts on the cathode side remain highly desired. Herein, template-assisted, scalable Fe-implanted N-doped porous carbon nanotube networks (Fe-N-CNNs) have been synthesized based on an environmentally friendly template hydroxyapatite nanowires (HAP NWs). Thanks to the hierarchical meso/micropores, high specific surface area, and abundant active sites, the optimized Fe-N-CNNs exhibit excellent oxygen reduction activity. Furthermore, the Zn-air batteries based on the Fe-N-CNNs cathode deliver a high discharge voltage of 1.27 V at a current density of 20 mA cm(-2) and a large peak power density of 202.2 mW cm(-2). More far-reaching, this HAP-based template strategy opens a new avenue toward the mass production of efficient, cost-effective electrocatalysts, and the Fe-N-CNNs with hollow interiors are expected to extend their other potential uses in energy storage, molecular sieves, adsorbents, and biomedical engineering.

• 出版日期2019-1-7
• 单位华中科技大学