ChemElectroChem
ChemElectroChem
5 years ago

Carbon Nanotubes/Carbon Fiber Paper Supported MnO2 Cathode Catalyst for Li−Air Batteries

Carbon Nanotubes/Carbon Fiber Paper Supported MnO2 Cathode Catalyst for Li−Air Batteries
You-Guo Huang, Qing-Yu Li, Hong-Qiang Wang, Jing Chen, Si-Jiang Hu, Xiao-Ping Fan, Ji-Ming Peng
Lithium−air batteries (LABs) are considered one of the most promising energy conversion systems for delivering large specific energy. However, practical applications still face major challenges, including poor rate capability, short cycle life, and low round-trip efficiencies. Here, we report a novel strategy to improve the catalytic activity of MnO2 through the combination of 3D MnO2 and carbon nanotubes/carbon fiber paper (CNTs/CFP) with a binder-free structure. Side reactions related to the binder are precluded in this design. The presence of CNTs not only promotes the formation of a 3D structure of the air electrode, but directs the uniform deposition of MnO2. When applied as a cathode in LABs, the as-prepared MnO2/CNTs/CFP electrode achieves comparable specific capacity (with a discharge capacity of 8723.5 mAh g−1(CNTs+MnO2) at 100 mA g−1). The encouraging electrochemical performance is found to benefit from free-standing nanoporous structures, which provide more active sites for enabling oxygen reduction. It is also attributed to the decreased side reactions. Binder-free and freestanding: The in situ formation of a binder-free and freestanding 3D MnO2/CNTs/CFP electrode increases the use efficiency of the catalyst. It achieves a good specific capacity, with a discharge capacity of 8723.5 mAh g−1(CNTs+MnO2) at 100 mA g−1.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/celc.201700582

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.