Nano Energy
Nano Energy
5 years ago

Hierarchically mesoporous nickel-iron nitride as a cost-efficient and highly durable electrocatalyst for Zn-air battery

Hierarchically mesoporous nickel-iron nitride as a cost-efficient and highly durable electrocatalyst for Zn-air battery
Rechargeable Zn-air battery is largely limited by the lack of low-cost and highly efficient bifunctional oxygen catalysts for both oxygen evolution and reduction reactions (OER and ORR). Herein, we report a promising bifunctional electrocatalyst, mesoporous nickel-iron nitride (Ni3FeN), which was synthesized by thermal ammonalysis of hierarchal NiFe layered double hydroxide microspheres. Different from the widely studied carbon/oxide composite catalysts, this metallic nitride does not need carbon as a conducting support, thus avoiding the issue of carbon corrosion at high potentials. The catalysts provide outstanding bifunctional performance with a low overpotential (0.355V) at 10mAcm−2, a low Tafel slope (70mVdec−1) for OER, and a positive half-wave potential (0.78V) for ORR under alkaline solution. More importantly, it delivers a lower voltage gap between charge and discharge and a better stability over 300 cycles compared to that of the more costly RuO2 air-cathode.

Publisher URL: www.sciencedirect.com/science

DOI: S221128551730383X

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.