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Shape-morphing carbon fiber composite using electrochemical actuation

Proceedings of the National Academy of Sciences - PNAS, 2020-04, Vol.117 (14), p.7658-7664 [Peer Reviewed Journal]

Copyright © 2020 the Author(s). Published by PNAS. ;Copyright National Academy of Sciences Apr 7, 2020 ;Copyright © 2020 the Author(s). Published by PNAS. 2020 ;ISSN: 0027-8424 ;ISSN: 1091-6490 ;EISSN: 1091-6490 ;DOI: 10.1073/pnas.1921132117 ;PMID: 32213583

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  • Title:
    Shape-morphing carbon fiber composite using electrochemical actuation
  • Author: Johannisson, Wilhelm ; Harnden, Ross ; Zenkert, Dan ; Lindbergh, Göran
  • Subjects: Actuation ; Aluminum ; Carbon fibers ; Composite materials ; Correlation analysis ; Electrochemistry ; Fiber composites ; Lithium ; Lithium ions ; Morphing ; Physical Sciences ; Rechargeable batteries ; Solid state ; Stiffness
  • Is Part Of: Proceedings of the National Academy of Sciences - PNAS, 2020-04, Vol.117 (14), p.7658-7664
  • Description: Structures that are capable of changing shape can increase efficiency in many applications, but are often heavy and maintenance intensive. To reduce the mass and mechanical complexity solid-state morphing materials are desirable but are typically nonstructural and problematic to control. Here we present an electrically controlled solid-state morphing composite material that is lightweight and has a stiffness higher than aluminum. It is capable of producing large deformations and holding them with no additional power, albeit at low rates. The material is manufactured from commercial carbon fibers and a structural battery electrolyte, and uses lithiumion insertion to produce shape changes at low voltages. A proof-ofconcept material in a cantilever setup is used to show morphing, and analytical modeling shows good correlation with experimental observations. The concept presented shows considerable promise and paves the way for stiff, solid-state morphing materials.
  • Publisher: United States: National Academy of Sciences
  • Language: English
  • Identifier: ISSN: 0027-8424
    ISSN: 1091-6490
    EISSN: 1091-6490
    DOI: 10.1073/pnas.1921132117
    PMID: 32213583
  • Source: GFMER Free Medical Journals
    PubMed Central
    SWEPUB Freely available online
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