Electrophoretic coating of LiFePO4/Graphene oxide on carbon fibers as cathode electrodes for structural lithium ion batteries
Artikel i vetenskaplig tidskrift, 2021

Carbon fibers (CF), commonly used in the structure of airplanes or cars, can also work as conductive electrodes in “structural batteries” for distributed energy storage. To this aim CF should be chemically functionalized, which is challenging due to their complex geometry and surface. Here, we describe an “all-electrostatic” approach taking advantage of the intrinsic conductivity of CF to coat them with a cathode material composed of LiFePO4 blended
with nanosheets of electrochemically exfoliated graphene oxide (EGO). We first achieve electrostatic selfassembly of the nanometric components at the nanoscale, then use Electrophoretic Deposition (EPD) to obtain a uniform, macroscale coating on the fibers. We achieve a LiFePO4 loading >90 wt% featuring good adhesion on the carbon fibers, low degradation upon battery cycling, low charge transfer resistance. The electrode composite outperforms similar state-of-the-art cathode materials when used in Half-Cell vs. Li. Full battery cells using coated CF as cathode and pristine CF as anode yield specific energy density of 222.14 Wh⋅kg􀀀 1 and power density of 0.29 kW⋅kg􀀀 1 with 88.1% capacity retention at 1 C over 300 cycles, compatible with industrial applications of this technique in composites production.

Carbon fiber Structural batteries Electrophoretic deposition Graphene Li-ion batteries

Författare

Jaime Sanchez Sanchez

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Johanna Xu

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Zhenyuan Xia

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Jinhua Sun

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Leif Asp

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Vincenzo Palermo

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Composites Science and Technology

0266-3538 (ISSN)

Vol. 208 108768

SORCERER

Europeiska kommissionen (EU), 2017-02-01 -- 2020-02-28.

2D material-baserad teknologi för industriella applikationer (2D-TECH)

Västra Götalandsregionen, 2020-05-01 -- 2023-04-30.

VINNOVA, 2020-05-01 -- 2023-04-30.

Drivkrafter

Hållbar utveckling

Innovation och entreprenörskap

Styrkeområden

Transport

Energi

Materialvetenskap

Ämneskategorier

Annan kemiteknik

Kompositmaterial och -teknik

Infrastruktur

Chalmers materialanalyslaboratorium

DOI

10.1016/j.compscitech.2021.108768

Mer information

Skapat

2021-03-20