Energy Storage from Industrial Waste

  • Author: Nancy McGuire
  • Published: 21 October 2015
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
  • Source / Publisher: ACS Sustainable Chemistry and Engineering/American Chemical Society
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: Energy Storage from Industrial Waste

Energy storage devices must be designed with the end use in mind: power-dense sources provide a large surge of energy very quickly (e.g., camera flash units), while energy-dense sources provide a steady supply of energy over a longer period of time (e.g., laptop batteries). Transition-metal oxide capacitors store and quickly release electrical charge through fast, reversible redox reactions at their surfaces.


Chaopeng Fu and Patrick Grant, University of Oxford, UK, showed how mill scale, a mixed iron oxide waste product that steel mills generate in tonne quantities, could be upcycled to form inexpensive pseudocapacitors. They sprayed powdered mill scale suspensions onto stainless steel sheets and aluminum foils to form electrodes. The electrodes where used in electrochemical cells with platinum counter-electrodes and aqueous sodium sulfite as the electrolyte.


This arrangement yielded 25 F/g capacitance at 0.25 A/g current, and the cells retained 83 % of their initial capacitance after 5000 cycles. Electrodes made from mill scale, an industrial waste product, can be made much more cheaply than similar electrodes made from commercial iron oxide nanoparticles or activated carbon.


 

Article Views: 1551

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


CONNECT:

ChemistryViews.org on Facebook

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


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH