High-Performance Anode Material for Potassium-Ion Batteries

  • Author: ChemistryViews.org
  • Published: 18 January 2019
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Energy & Environmental Science/Royal Society of Chemistry
  • Associated Societies: Royal Society of Chemistry (RSC), UK
thumbnail image: High-Performance Anode Material for Potassium-Ion Batteries

Potassium-ion batteries (PIBs) could be a promising alternative for the commonly used lithium-ion batteries. This is due to the higher abundance of potassium on earth. Lithium resources are limited. However, it is difficult to find suitable electrode materials which can accommodate the larger potassium ions and provide sufficiently fast reaction dynamics.

Michael R. Zachariah, Chunsheng Wang, University of Maryland, College Park, USA, and colleagues have developed a high-performance composite anode material for PIBs, consisting of Sb nanoparticles encapsulated by a carbon-sphere network (CSN). The team used an electrospray strategy to create microdroplets of a precursor solution containing polyacrylonitrile (PAN) and SbCl3. The resulting SbCl3-containing PAN nanospheres were heated and reduced with H2 to give the desired Sb@CSN material, which contains metallic Sb.

Sb@CSN anodes can incorporate potassium and form phases such as KSb2, KSb, K5Sb4, and K3Sb sequentially and reversibly. The carbon network provides electrical conductivity. Sb@CSN anodes have a high reversible capacity with a slow capacity decay. According to the researchers, the material provides one of the best anode performances for all-potassium-ion batteries so far.


Article Views: 1986

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter

Magazine of Chemistry Europe (16 European Chemical Societies)published by Wiley-VCH