Alla, Aminy, Michael, Jerica, Igal, and Balthazar’s Paper in Science Advances

Alla, Aminy, Michael, Jerica, Igal, and Balthazar’s on flexible and stretchable power sources got published in Science Advances. Congrats!!!

Paper title: Flexible and stretchable power sources for wearable electronics

Abstract: Flexible and stretchable power sources represent a key technology for the realization of wearable electronics. Developing flexible and stretchable batteries with mechanical endurance that is on par with commercial standards and offer compliance while retaining safety remains a significant challenge. We present a unique approach that demonstrates mechanically robust, intrinsically safe silver-zinc batteries. This approach uses current collectors with enhanced mechanical design, such as helical springs and serpentines, as a structural support and backbone for all battery components. We show wire-shaped batteries based on helical band springs that are resilient to fatigue and retain electrochemical performance over 17,000 flexure cycles at a 0.5-cm bending radius. Serpentine-shaped batteries can be stretched with tunable degree and directionality while maintaining their specific capacity. Finally, the batteries are integrated, as a wearable device, with a photovoltaic module that enables recharging of the batteries.

Publication:

  • [PDF] [URL] A. M. Zamarayeva, A. E. Ostfeld, M. Wang, J. K. Duey, I. Deckman, B. P. LechĂȘne, G. Davies, D. A. Steingart, and A. C. Arias, “Flexible and stretchable power sources for wearable electronics,” Science Advances, vol. 3, iss. 6, 2017.

    [Abstract]

    Flexible and stretchable power sources represent a key technology for the realization of wearable electronics. Developing flexible and stretchable batteries with mechanical endurance that is on par with commercial standards and offer compliance while retaining safety remains a significant challenge. We present a unique approach that demonstrates mechanically robust, intrinsically safe silver-zinc batteries. This approach uses current collectors with enhanced mechanical design, such as helical springs and serpentines, as a structural support and backbone for all battery components. We show wire-shaped batteries based on helical band springs that are resilient to fatigue and retain electrochemical performance over 17,000 flexure cycles at a 0.5-cm bending radius. Serpentine-shaped batteries can be stretched with tunable degree and directionality while maintaining their specific capacity. Finally, the batteries are integrated, as a wearable device, with a photovoltaic module that enables recharging of the batteries.

    [Bibtex]

    @article {zamarayeva2017flexible,
    author = {Zamarayeva, Alla M. and Ostfeld, Aminy E. and Wang, Michael and Duey, Jerica K. and Deckman, Igal and Lech{\^e}ne, Balthazar P. and Davies, Greg and Steingart, Daniel A. and Arias, Ana Claudia},
    title = {Flexible and stretchable power sources for wearable electronics},
    volume = {3},
    number = {6},
    year = {2017},
    doi = {10.1126/sciadv.1602051},
    publisher = {American Association for the Advancement of Science},
    abstract = {Flexible and stretchable power sources represent a key technology for the realization of wearable electronics. Developing flexible and stretchable batteries with mechanical endurance that is on par with commercial standards and offer compliance while retaining safety remains a significant challenge. We present a unique approach that demonstrates mechanically robust, intrinsically safe silver-zinc batteries. This approach uses current collectors with enhanced mechanical design, such as helical springs and serpentines, as a structural support and backbone for all battery components. We show wire-shaped batteries based on helical band springs that are resilient to fatigue and retain electrochemical performance over 17,000 flexure cycles at a 0.5-cm bending radius. Serpentine-shaped batteries can be stretched with tunable degree and directionality while maintaining their specific capacity. Finally, the batteries are integrated, as a wearable device, with a photovoltaic module that enables recharging of the batteries.},
    URL = {http://advances.sciencemag.org/content/3/6/e1602051},
    eprint = {http://advances.sciencemag.org/content/3/6/e1602051.full.pdf},
    journal = {Science Advances},
    thumbnail = {https://www.ocf.berkeley.edu/~arias/public/publications/files/zamarayeva2017flexible.png},
    pdf = {https://www.ocf.berkeley.edu/~arias/public/publications/files/zamarayeva2017flexible.pdf}
    }