Low-Temperature Supercapacitors Using Porous Carbon Aerogels

  • Author: ChemistryViews.org
  • Published: 19 March 2021
  • Copyright: Wiley-VCH GmbH
  • Source / Publisher: Nano Letters/ACS Publications
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: Low-Temperature Supercapacitors Using Porous Carbon Aerogels

Supercapacitors are an alternative to batteries that can charge and discharge very fast. However, preserving this fast-charging capability at low temperatures is challenging. Conventional porous carbon electrodes do not perform well in the cold due to the lowered ion- and charge transport.

Jennifer Q. Lu, University of California, Merced, USA, Yat Li, University of California, Santa Cruz, USA, and colleagues have developed 3D-printed porous carbon aerogels for electrodes in ultralow-temperature supercapacitors, reducing heating needs, e.g., for capacitors used in space or polar missions. The team 3D-printed a porous carbon aerogel in a lattice pattern via a direct ink writing (DIW) method, using an ink based on cellulose nanocrystals and a silica nanosphere suspension. The cellulose nanocrystals act as a carbon precursor and the silica serves as a template for creating pores. After printing, the material was freeze-dried and carbonized, the silica template was removed, and the material was activated using KOH.

The resulting product has multiple levels of pores, from 500-µm pores in its lattice-like structure to nanometer-sized pores within the bars of the lattice. This multiscale porous network provides adequate ion diffusion and charge transfer through the resulting electrode at –70 °C, achieving higher energy storage capacitance than previously reported low-temperature supercapacitors.



Article Views: 1274

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 ChemistryViews.org, please contact us first for permission. more

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