4 years ago

Graphene Foam Decorated with Ceria Microspheres as a Flexible Cathode for Foldable Lithium-Air Batteries

Graphene Foam Decorated with Ceria Microspheres as a Flexible Cathode for Foldable Lithium-Air Batteries
Lichao Jia, Yizhen Huang, Lu Zou, Junfang Cheng, Jian Pu, Bo Chi, Jian Li, Xinyu Li, Yuexing Jiang
Foldable lithium-air batteries with a high theoretical specific energy show wide applications in portable electronic devices, and the flexible cathodes play the most important role. In this work, CeO2 microspheres are grown in situ on 3 D interconnected graphene foam by hydrothermal treatment as the flexible cathode for lithium-air batteries. With the assistance of a macroporous framework for rapid O2 diffusion and CeO2 distributed uniformly for enhanced catalytic activity towards the oxygen reduction reaction, the lightweight flexible cathodes show a large discharge capacity of 3250 mA h g−1 at a current density of 200 mA g−1 (based on the whole cathode) and can cycle steadily for 80 times with a capacity limitation of 600 mA h g−1. The flexible lithium-air battery based on the new cathode also shows a stable discharge/charge potential platform during bending and good electrochemical reversibility after bending for at least 1000 times in ambient air. The study reveals that the high-catalytic-activity flexible cathode would be suitable for foldable lithium-air batteries. Foam party: CeO2 microspheres on 3 D graphene foam are synthesized by an in situ hydrothermal process. The materials are studied as flexible cathodes for foldable lithium-air batteries and show stable discharge and charge platforms even at 80 cycles.

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

DOI: 10.1002/cctc.201700942

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.