Doped Cathode Materials for Sodium-Ion Batteries

  • Author: Batteries & Supercaps
  • Published Date: 04 March 2020
  • Source / Publisher: Batteries & Supercaps/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
thumbnail image: Doped Cathode Materials for Sodium-Ion Batteries

Related Societies

Sodium-ion batteries (SIBs) provide a promising alternative to lithium-ion batteries (LIBs). SIBs are generally both cheaper and more sustainable than LIBs because they use earth-abundant elements.

Xin Li, Harvard University, Cambridge, MA, USA, and colleagues have introduced Cu into cathode materials for SIBs, resulting in improved performance. The team synthesized a series of layered Na0.75Mn0.6Fe0.2(CuxNi0.2‐x)O2 compounds, using only low-cost, earth-abundant metals. The compounds were synthesized by solid‐state reactions starting from sodium carbonate, manganese oxide, iron oxide, copper oxide, and nickel oxide. The team found optimal capacity retention in the resulting batteries at a moderate Cu doping level.

The researchers found that at a low voltage, Cu2+ can induce competing effects on the ionic and electronic conductivities, which is why medium copper levels result in optimal performance. The copper ions cause a Jahn‐Teller distortion, which enhances the Na-ion diffusivity (diffusion pathways pictured) and reduces the electronic conductivity. The work could help with the design of next-generation SIBs.



Article Views: 2576

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

If you would like to reuse any content, in print or online, from, please contact us first for permission and consult our permission guidance prior to making your request

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

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