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Characterization of the adhesive properties between structural battery electrolytes and carbon fibers
Luleå Univ Technol, Mat Sci, Dept Engn Sci & Math, SE-97187 Luleå, Sweden.;Chalmers Univ Technol, Dept Ind & Mat Sci, SE-41296' Gothenburg, Sweden..
KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Vehicle Engineering and Solid Mechanics.ORCID iD: 0000-0002-1194-9479
Chalmers Univ Technol, Dept Ind & Mat Sci, SE-41296' Gothenburg, Sweden..
Chalmers Univ Technol, Dept Ind & Mat Sci, SE-41296' Gothenburg, Sweden..
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2020 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 188, article id 107962Article in journal (Refereed) Published
Abstract [en]

Structural batteries can simultaneously store electrical energy and carry mechanical load, being similar to both laminated carbon fiber composites and lithium ion batteries. The matrix in a structural battery must both conduct ions and transfer load between the fibers, made possible with a phase-separated combination of a solid polymer and a liquid electrolyte. This leads to a trade-off between the polymer contact creating adhesion and liquid contact creating ionic conductivity. Here we investigate the fiber-matrix adhesion between carbon fibres with different sizing and two different matrix systems, using microbond testing supported by transverse tensile tests. The results show that the mechanical adhesion of the fiber-matrix interface is lower than that of a commercial non-ion conducting polymer matrix but sufficient for structural battery applications.

Place, publisher, year, edition, pages
ELSEVIER SCI LTD , 2020. Vol. 188, article id 107962
Keywords [en]
Functional composites, Carbon fibres, Fibre/matrix bond, Interfacial strength, Scanning electron microscopy (SEM)
National Category
Composite Science and Engineering
Identifiers
URN: urn:nbn:se:kth:diva-270887DOI: 10.1016/j.compscitech.2019.107962ISI: 000515192300014Scopus ID: 2-s2.0-85077147525OAI: oai:DiVA.org:kth-270887DiVA, id: diva2:1416751
Note

QC 20200325

Available from: 2020-03-25 Created: 2020-03-25 Last updated: 2022-06-26Bibliographically approved
In thesis
1. Exploring structural carbon fiber composites for mass-less energy and actuation
Open this publication in new window or tab >>Exploring structural carbon fiber composites for mass-less energy and actuation
2020 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The energy consumption in transport is today a large contributor to global greenhouse emissions. One way of reducing these emissions is by electrification, which is an ongoing journey for the vehicle industry. The aeronautical industry has started investigations but are limited by the relatively low specific energy of batteries.

One way to improve the specific energy of batteries is by making them multifunctional by combining them with other functions of the vehicle. When the battery is combined with a structural material, the resulting material is referred to as a structural battery. This structural battery ultimately performs the fundamental function of mechanical rigidity and the battery function provides almost mass-less energy. The idea of structural batteries has been around for a while, but its actual construction has not yet been understood.

This thesis is focused on exploring the design and implications of structural batteries made from carbon fiber composites. The first section is focused on the construction of the structural battery. Specifically investigating a structural carbon fiber negative electrode with regards to its manufacturing, electrochemical properties and mechanical properties. The results show that the construction of a negative electrode for structural batteries is achievable. The next section is using the findings from the first section in exploring the implications of implementing a structural battery into vehicles with regards to weight saving and life cycle characteristics. The findings show that the structural batteries have the potential to decrease both weight and life cycle burdens. The last section presents the use of the structural carbon fiber negative electrodes as a morphing material controlled by applied electrical power. The morphing deformations are large and stationary when power is removed but the morphing rate of the material is limited. Additionally, it is solid state, lightweight and has an elastic modulus higher than aluminum with large morphing deformations.

The long-term outcomes of a thesis are hard to predict, but the findings herein conclude that the technology of structural batteries have the potential to disrupt energy storage in transportation, as well as traditional actuation and morphing technologies.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2020. p. 86
Series
TRITA-SCI-FOU ; 2020:15
National Category
Composite Science and Engineering
Research subject
Aerospace Engineering
Identifiers
urn:nbn:se:kth:diva-273192 (URN)978-91-7873-552-5 (ISBN)
Public defence
2020-06-03, Live-streaming: https://kth-se.zoom.us/j/64148260640 If you lack computer or computer skills, contact Dan Zenkert, danz@kth.se, Stockholm, 14:00 (English)
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Note

QC 20200512

Available from: 2020-05-12 Created: 2020-05-11 Last updated: 2022-06-26Bibliographically approved

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Johannisson, WilhelmZenkert, DanLindbergh, Göran

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