i4Energy Seminar: Printed Energy Storage Devices for Micro-power Supplies

  • April 30, 2010: 12:00pm – 1:00pm
  • Location: 250 Sutardja Dai Hall, UC Berkeley

Christine Ho, UC Berkeley

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As electronic devices become smaller in volume and more specialized in functionality, a paradigm shift in energy storage design and manufacture is beginning to emerge and can be realized with the development of simple, low-cost, solutions-based processing methods to incorporate custom energy buffers directly onto a device. I will discuss the motivations and implications of this paradigm shift and how this affects the rules for comprehensive device design especially for miniature (< 1 cm^3), low power applications. We have been developing the materials and direct write fabrication methods for printing carbon based electrochemical capacitors and zinc batteries directly onto a substrate. Our materials efforts include the optimization of mechanical and ionic transport properties of ionic liquid gel electrolytes, and this has enabled the fabrication of completely printable “solid-state” capacitors and batteries, mitigating manufacturing and packaging concerns. Through a pneumatic dispenser printing system, the energy storage devices can be patterned and integrated directly on-chip. Comprehensive device characterization, including long-term cycling performance and rate behavior will also be presented.


All i4energy talks take place at noon on Fridays in the Banatao Auditorium on the 3rd floor of Sutardja Dai Hall, UC Berkeley. These talks are free, open to the public and broadcast live on-line at  mms://media.citris.berkeley.edu/webcast the day and time of the event. Questions can be sent via Yahoo IM to username: citrisevents.

The spring series is online at http://www.citris-uc.org/events/i4e-spring2010.

Please note that all CITRIS Talks can now be viewed on youtube.com/citris