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Structural Batteries with LiFePO4-Impregnated Carbon Fibers

Yucel, Yasemin Duygu (author)
KTH,Tillämpad elektrokemi
Bouton, Karl (author)
KTH,Farkostteknik och Solidmekanik
Adolfsson, Erik (author)
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Dykhoff, Henrik (author)
Pettersson, Jocke (author)
Trey, Stacy (author)
Wysocki, Maciej (author)
Zenkert, Dan, 1961- (author)
KTH,Farkostteknik och Solidmekanik
Wreland Lindström, Rakel, 1973- (author)
KTH,Tillämpad elektrokemi
Lindbergh, Göran, 1959- (author)
KTH,Tillämpad elektrokemi
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 (creator_code:org_t)
English.
Related links:
https://urn.kb.se/re...
  • Other publication (other academic/artistic)
Abstract Subject headings
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  • This study focuses on the fabrication and evaluation of structural batteries, emphasizing their electrochemical performance. LiFePO4 (LFP)-impregnated carbon fibers (CFs), produced via the powder impregnation method, were employed as positive electrodes. These electrodes underwent infusion with structural battery electrolyte (SBE) and curing to yield positive structural battery electrodes. A structural battery fully based on CFs was constructed and subjected to electrochemical testing, with positive electrodes assembled versus pristine CF of T800S as negative electrodes. The results revealed specific discharge capacities of 123 mAh g-1LFP for the structural positive electrode and 178 mAh g-1T800S for the structural battery, both at similar current densities. Both the half and full structural cells maintained capacities of 94% and 96%, respectively, during rate capability tests when reverting to their initial current densities. The electrochemical impedance spectroscopy (EIS) results revealed that, the structural battery demonstrated a relatively improved surface impedance, with the values ranging between 186 Ω cm² and 2000 Ω cm². Additionally, similar comparative studies were conducted on full cells in a commercial liquid electrolyte consisting of 1M LiPF6 in EC: DEC (1:1 vol.%). The research introduces a prototype of laminated composite batteries, showing their potential, especially when utilizing fully carbon fiber-based electrodes.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Kemiteknik -- Annan kemiteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Chemical Engineering -- Other Chemical Engineering (hsv//eng)

Keyword

Carbon fibers
LiFePO4
polymer electrolyte
structural battery
Lithium-ion battery
Chemical Engineering
Kemiteknik

Publication and Content Type

vet (subject category)
ovr (subject category)

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